Merge pull request #5333 from Isira-Seneviratne/Convert_AnimationUtils_to_extensions

Convert AnimationUtils functions to extension functions.

app/src/main/java/org/schabi/newpipe/fragments/BaseStateFragment.java

@@ -37,7 +37,7 @@ import icepick.State;
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
 import io.reactivex.rxjava3.disposables.Disposable;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 
 public abstract class BaseStateFragment<I> extends BaseFragment implements ViewContract<I> {
     @State
@@ -131,35 +131,35 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
     @Override
     public void showLoading() {
         if (emptyStateView != null) {
-            animateView(emptyStateView, false, 150);
+            animate(emptyStateView, false, 150);
         }
         if (loadingProgressBar != null) {
-            animateView(loadingProgressBar, true, 400);
+            animate(loadingProgressBar, true, 400);
         }
-        animateView(errorPanelRoot, false, 150);
+        animate(errorPanelRoot, false, 150);
     }
 
     @Override
     public void hideLoading() {
         if (emptyStateView != null) {
-            animateView(emptyStateView, false, 150);
+            animate(emptyStateView, false, 150);
         }
         if (loadingProgressBar != null) {
-            animateView(loadingProgressBar, false, 0);
+            animate(loadingProgressBar, false, 0);
         }
-        animateView(errorPanelRoot, false, 150);
+        animate(errorPanelRoot, false, 150);
     }
 
     @Override
     public void showEmptyState() {
         isLoading.set(false);
         if (emptyStateView != null) {
-            animateView(emptyStateView, true, 200);
+            animate(emptyStateView, true, 200);
         }
         if (loadingProgressBar != null) {
-            animateView(loadingProgressBar, false, 0);
+            animate(loadingProgressBar, false, 0);
         }
-        animateView(errorPanelRoot, false, 150);
+        animate(errorPanelRoot, false, 150);
     }
 
     @Override
@@ -174,11 +174,11 @@ public abstract class BaseStateFragment<I> extends BaseFragment implements ViewC
 
         errorTextView.setText(message);
         if (showRetryButton) {
-            animateView(errorButtonRetry, true, 600);
+            animate(errorButtonRetry, true, 600);
         } else {
-            animateView(errorButtonRetry, false, 0);
+            animate(errorButtonRetry, false, 0);
         }
-        animateView(errorPanelRoot, true, 300);
+        animate(errorPanelRoot, true, 300);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -76,11 +76,12 @@ import org.schabi.newpipe.fragments.BaseStateFragment;
 import org.schabi.newpipe.fragments.EmptyFragment;
 import org.schabi.newpipe.fragments.list.comments.CommentsFragment;
 import org.schabi.newpipe.fragments.list.videos.RelatedVideosFragment;
+import org.schabi.newpipe.ktx.AnimationType;
 import org.schabi.newpipe.local.dialog.PlaylistAppendDialog;
 import org.schabi.newpipe.local.dialog.PlaylistCreationDialog;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
-import org.schabi.newpipe.player.Player;
 import org.schabi.newpipe.player.MainPlayer;
+import org.schabi.newpipe.player.Player;
 import org.schabi.newpipe.player.event.OnKeyDownListener;
 import org.schabi.newpipe.player.event.PlayerServiceExtendedEventListener;
 import org.schabi.newpipe.player.helper.PlayerHelper;
@@ -125,7 +126,7 @@ import static org.schabi.newpipe.extractor.stream.StreamExtractor.NO_AGE_LIMIT;
 import static org.schabi.newpipe.player.helper.PlayerHelper.globalScreenOrientationLocked;
 import static org.schabi.newpipe.player.helper.PlayerHelper.isClearingQueueConfirmationRequired;
 import static org.schabi.newpipe.player.playqueue.PlayQueueItem.RECOVERY_UNSET;
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.util.ExtractorHelper.showMetaInfoInTextView;
 
 public final class VideoDetailFragment
@@ -745,8 +746,10 @@ public final class VideoDetailFragment
             }
 
             if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
-                animateView(appendControlsDetail, true, 250, 0, () ->
+                animate(appendControlsDetail, true, 250, AnimationType.ALPHA,
-                        animateView(appendControlsDetail, false, 1500, 1000));
+                        0, () ->
+                        animate(appendControlsDetail, false, 1500,
+                                AnimationType.ALPHA, 1000));
             }
             return false;
         };
@@ -1334,8 +1337,8 @@ public final class VideoDetailFragment
 
         thumbnailImageView.setImageDrawable(
                 AppCompatResources.getDrawable(requireContext(), imageResource));
-        animateView(thumbnailImageView, false, 0, 0,
+        animate(thumbnailImageView, false, 0, AnimationType.ALPHA, 0,
-                () -> animateView(thumbnailImageView, true, 500));
+                () -> animate(thumbnailImageView, true, 500));
     }
 
     @Override
@@ -1417,14 +1420,14 @@ public final class VideoDetailFragment
             contentRootLayoutHiding.setVisibility(View.INVISIBLE);
         }
 
-        animateView(thumbnailPlayButton, false, 50);
+        animate(thumbnailPlayButton, false, 50);
-        animateView(detailDurationView, false, 100);
+        animate(detailDurationView, false, 100);
-        animateView(detailPositionView, false, 100);
+        animate(detailPositionView, false, 100);
-        animateView(positionView, false, 50);
+        animate(positionView, false, 50);
 
         videoTitleTextView.setText(title);
         videoTitleTextView.setMaxLines(1);
-        animateView(videoTitleTextView, true, 0);
+        animate(videoTitleTextView, true, 0);
 
         videoDescriptionRootLayout.setVisibility(View.GONE);
         videoTitleToggleArrow.setVisibility(View.GONE);
@@ -1466,7 +1469,7 @@ public final class VideoDetailFragment
                         player != null && player.isFullscreen() ? View.GONE : View.VISIBLE);
             }
         }
-        animateView(thumbnailPlayButton, true, 200);
+        animate(thumbnailPlayButton, true, 200);
         videoTitleTextView.setText(title);
 
         if (!isEmpty(info.getSubChannelName())) {
@@ -1530,12 +1533,12 @@ public final class VideoDetailFragment
             detailDurationView.setText(Localization.getDurationString(info.getDuration()));
             detailDurationView.setBackgroundColor(
                     ContextCompat.getColor(activity, R.color.duration_background_color));
-            animateView(detailDurationView, true, 100);
+            animate(detailDurationView, true, 100);
         } else if (info.getStreamType() == StreamType.LIVE_STREAM) {
             detailDurationView.setText(R.string.duration_live);
             detailDurationView.setBackgroundColor(
                     ContextCompat.getColor(activity, R.color.live_duration_background_color));
-            animateView(detailDurationView, true, 100);
+            animate(detailDurationView, true, 100);
         } else {
             detailDurationView.setVisibility(View.GONE);
         }
@@ -1703,8 +1706,8 @@ public final class VideoDetailFragment
                 // Show saved position from backStack if user allows it
                 showPlaybackProgress(playQueue.getItem().getRecoveryPosition(),
                         playQueue.getItem().getDuration() * 1000);
-                animateView(positionView, true, 500);
+                animate(positionView, true, 500);
-                animateView(detailPositionView, true, 500);
+                animate(detailPositionView, true, 500);
             }
             return;
         }
@@ -1718,8 +1721,8 @@ public final class VideoDetailFragment
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(state -> {
                     showPlaybackProgress(state.getProgressTime(), info.getDuration() * 1000);
-                    animateView(positionView, true, 500);
+                    animate(positionView, true, 500);
-                    animateView(detailPositionView, true, 500);
+                    animate(detailPositionView, true, 500);
                 }, e -> {
                     if (DEBUG) {
                         e.printStackTrace();
@@ -1747,8 +1750,8 @@ public final class VideoDetailFragment
             detailPositionView.setText(position);
         }
         if (positionView.getVisibility() != View.VISIBLE) {
-            animateView(positionView, true, 100);
+            animate(positionView, true, 100);
-            animateView(detailPositionView, true, 100);
+            animate(detailPositionView, true, 100);
         }
     }
 
@@ -1802,8 +1805,8 @@ public final class VideoDetailFragment
                         && player.getPlayQueue() != null
                         && player.getPlayQueue().getItem() != null
                         && player.getPlayQueue().getItem().getUrl().equals(url)) {
-                    animateView(positionView, true, 100);
+                    animate(positionView, true, 100);
-                    animateView(detailPositionView, true, 100);
+                    animate(detailPositionView, true, 100);
                 }
                 break;
         }

app/src/main/java/org/schabi/newpipe/fragments/list/BaseListFragment.java

@@ -46,7 +46,7 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Queue;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 
 public abstract class BaseListFragment<I, N> extends BaseStateFragment<I>
         implements ListViewContract<I, N>, StateSaver.WriteRead,
@@ -406,23 +406,17 @@ public abstract class BaseListFragment<I, N> extends BaseStateFragment<I>
     // Contract
     //////////////////////////////////////////////////////////////////////////*/
 
-    @Override
-    public void showLoading() {
-        super.showLoading();
-        // animateView(itemsList, false, 400);
-    }
-
     @Override
     public void hideLoading() {
         super.hideLoading();
-        animateView(itemsList, true, 300);
+        animate(itemsList, true, 300);
     }
 
     @Override
     public void showError(final String message, final boolean showRetryButton) {
         super.showError(message, showRetryButton);
         showListFooter(false);
-        animateView(itemsList, false, 200);
+        animate(itemsList, false, 200);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java

@@ -37,12 +37,12 @@ import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
+import org.schabi.newpipe.ktx.AnimationType;
 import org.schabi.newpipe.local.subscription.SubscriptionManager;
 import org.schabi.newpipe.player.playqueue.ChannelPlayQueue;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.report.ErrorActivity;
 import org.schabi.newpipe.report.UserAction;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
 import org.schabi.newpipe.util.ImageDisplayConstants;
 import org.schabi.newpipe.util.Localization;
@@ -64,9 +64,9 @@ import io.reactivex.rxjava3.functions.Consumer;
 import io.reactivex.rxjava3.functions.Function;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateBackgroundColor;
+import static org.schabi.newpipe.ktx.TextViewUtils.animateTextColor;
-import static org.schabi.newpipe.util.AnimationUtils.animateTextColor;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animateBackgroundColor;
 
 public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
         implements View.OnClickListener {
@@ -224,7 +224,7 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
 
     private void monitorSubscription(final ChannelInfo info) {
         final Consumer<Throwable> onError = (Throwable throwable) -> {
-            animateView(headerBinding.channelSubscribeButton, false, 100);
+            animate(headerBinding.channelSubscribeButton, false, 100);
             showSnackBarError(throwable, UserAction.SUBSCRIPTION,
                     NewPipe.getNameOfService(currentInfo.getServiceId()),
                     "Get subscription status", 0);
@@ -379,8 +379,8 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
                     subscribedText);
         }
 
-        animateView(headerBinding.channelSubscribeButton, AnimationUtils.Type.LIGHT_SCALE_AND_ALPHA,
+        animate(headerBinding.channelSubscribeButton, true, 100,
-                true, 100);
+                AnimationType.LIGHT_SCALE_AND_ALPHA);
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -436,7 +436,7 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
         IMAGE_LOADER.cancelDisplayTask(headerBinding.channelBannerImage);
         IMAGE_LOADER.cancelDisplayTask(headerBinding.channelAvatarView);
         IMAGE_LOADER.cancelDisplayTask(headerBinding.subChannelAvatarView);
-        animateView(headerBinding.channelSubscribeButton, false, 100);
+        animate(headerBinding.channelSubscribeButton, false, 100);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.java

@@ -16,8 +16,8 @@ import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.comments.CommentsInfo;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
+import org.schabi.newpipe.ktx.ViewUtils;
 import org.schabi.newpipe.report.UserAction;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
 
 import io.reactivex.rxjava3.core.Single;
@@ -84,17 +84,15 @@ public class CommentsFragment extends BaseListInfoFragment<CommentsInfo> {
     public void handleResult(@NonNull final CommentsInfo result) {
         super.handleResult(result);
 
-        AnimationUtils.slideUp(requireView(), 120, 150, 0.06f);
+        ViewUtils.slideUp(requireView(), 120, 150, 0.06f);
 
         if (!result.getErrors().isEmpty()) {
             showSnackBarError(result.getErrors(), UserAction.REQUESTED_COMMENTS,
                     NewPipe.getNameOfService(result.getServiceId()), result.getUrl(), 0);
         }
 
-        if (disposables != null) {
         disposables.clear();
     }
-    }
 
     @Override
     public void handleNextItems(final ListExtractor.InfoItemsPage result) {

app/src/main/java/org/schabi/newpipe/fragments/list/kiosk/KioskFragment.java

@@ -28,7 +28,7 @@ import org.schabi.newpipe.util.Localization;
 import icepick.State;
 import io.reactivex.rxjava3.core.Single;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 
 /**
  * Created by Christian Schabesberger on 23.09.17.
@@ -160,7 +160,7 @@ public class KioskFragment extends BaseListInfoFragment<KioskInfo> {
     @Override
     public void showLoading() {
         super.showLoading();
-        animateView(itemsList, false, 100);
+        animate(itemsList, false, 100);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java

@@ -61,7 +61,7 @@ import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import io.reactivex.rxjava3.disposables.Disposable;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.util.ThemeHelper.resolveResourceIdFromAttr;
 
 public class PlaylistFragment extends BaseListInfoFragment<PlaylistInfo> {
@@ -261,19 +261,19 @@ public class PlaylistFragment extends BaseListInfoFragment<PlaylistInfo> {
     @Override
     public void showLoading() {
         super.showLoading();
-        animateView(headerBinding.getRoot(), false, 200);
+        animate(headerBinding.getRoot(), false, 200);
-        animateView(itemsList, false, 100);
+        animate(itemsList, false, 100);
 
         IMAGE_LOADER.cancelDisplayTask(headerBinding.uploaderAvatarView);
-        animateView(headerBinding.uploaderLayout, false, 200);
+        animate(headerBinding.uploaderLayout, false, 200);
     }
 
     @Override
     public void handleResult(@NonNull final PlaylistInfo result) {
         super.handleResult(result);
 
-        animateView(headerBinding.getRoot(), true, 100);
+        animate(headerBinding.getRoot(), true, 100);
-        animateView(headerBinding.uploaderLayout, true, 300);
+        animate(headerBinding.uploaderLayout, true, 300);
         headerBinding.uploaderLayout.setOnClickListener(null);
         // If we have an uploader put them into the UI
         if (!TextUtils.isEmpty(result.getUploaderName())) {

app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java

@@ -51,12 +51,12 @@ import org.schabi.newpipe.extractor.services.peertube.linkHandler.PeertubeSearch
 import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory;
 import org.schabi.newpipe.fragments.BackPressable;
 import org.schabi.newpipe.fragments.list.BaseListFragment;
+import org.schabi.newpipe.ktx.AnimationType;
 import org.schabi.newpipe.ktx.ExceptionUtils;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
 import org.schabi.newpipe.report.ErrorActivity;
 import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
@@ -82,7 +82,7 @@ import io.reactivex.rxjava3.subjects.PublishSubject;
 
 import static androidx.recyclerview.widget.ItemTouchHelper.Callback.makeMovementFlags;
 import static java.util.Arrays.asList;
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.util.ExtractorHelper.showMetaInfoInTextView;
 
 public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.InfoItemsPage<?>>
@@ -413,7 +413,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                 searchEditText.setText("");
                 showKeyboardSearch();
             }
-            animateView(errorPanelRoot, false, 200);
+            animate(errorPanelRoot, false, 200);
         }
     }
 
@@ -644,8 +644,8 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
             Log.d(TAG, "showSuggestionsPanel() called");
         }
         suggestionsPanelVisible = true;
-        animateView(searchBinding.suggestionsPanel, AnimationUtils.Type.LIGHT_SLIDE_AND_ALPHA,
+        animate(searchBinding.suggestionsPanel, true, 200,
-                true, 200);
+                AnimationType.LIGHT_SLIDE_AND_ALPHA);
     }
 
     private void hideSuggestionsPanel() {
@@ -653,8 +653,8 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
             Log.d(TAG, "hideSuggestionsPanel() called");
         }
         suggestionsPanelVisible = false;
-        animateView(searchBinding.suggestionsPanel, AnimationUtils.Type.LIGHT_SLIDE_AND_ALPHA,
+        animate(searchBinding.suggestionsPanel, false, 200,
-                false, 200);
+                AnimationType.LIGHT_SLIDE_AND_ALPHA);
     }
 
     private void showKeyboardSearch() {

app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java

@@ -20,8 +20,8 @@ import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
+import org.schabi.newpipe.ktx.ViewUtils;
 import org.schabi.newpipe.report.UserAction;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.RelatedStreamInfo;
 
 import java.io.Serializable;
@@ -123,7 +123,7 @@ public class RelatedVideosFragment extends BaseListInfoFragment<RelatedStreamInf
         if (headerBinding != null) {
             headerBinding.getRoot().setVisibility(View.VISIBLE);
         }
-        AnimationUtils.slideUp(getView(), 120, 96, 0.06f);
+        ViewUtils.slideUp(requireView(), 120, 96, 0.06f);
 
         if (!result.getErrors().isEmpty()) {
             showSnackBarError(result.getErrors(), UserAction.REQUESTED_STREAM,

app/src/main/java/org/schabi/newpipe/info_list/holder/StreamMiniInfoItemHolder.java

@@ -13,8 +13,8 @@ import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamType;
 import org.schabi.newpipe.info_list.InfoItemBuilder;
+import org.schabi.newpipe.ktx.ViewUtils;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.ImageDisplayConstants;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.views.AnimatedProgressBar;
@@ -125,10 +125,10 @@ public class StreamMiniInfoItemHolder extends InfoItemHolder {
             } else {
                 itemProgressView.setProgress((int) TimeUnit.MILLISECONDS
                         .toSeconds(state.getProgressTime()));
-                AnimationUtils.animateView(itemProgressView, true, 500);
+                ViewUtils.animate(itemProgressView, true, 500);
             }
         } else if (itemProgressView.getVisibility() == View.VISIBLE) {
-            AnimationUtils.animateView(itemProgressView, false, 500);
+            ViewUtils.animate(itemProgressView, false, 500);
         }
     }
 

app/src/main/java/org/schabi/newpipe/ktx/TextView.kt

@@ -0,0 +1,47 @@
+@file:JvmName("TextViewUtils")
+
+package org.schabi.newpipe.ktx
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.animation.ArgbEvaluator
+import android.animation.ValueAnimator
+import android.util.Log
+import android.widget.TextView
+import androidx.annotation.ColorInt
+import androidx.interpolator.view.animation.FastOutSlowInInterpolator
+import org.schabi.newpipe.MainActivity
+
+private const val TAG = "TextViewUtils"
+
+/**
+ * Animate the text color of any view that extends [TextView] (Buttons, EditText...).
+ *
+ * @param duration   the duration of the animation
+ * @param colorStart the text color to start with
+ * @param colorEnd   the text color to end with
+ */
+fun TextView.animateTextColor(duration: Long, @ColorInt colorStart: Int, @ColorInt colorEnd: Int) {
+    if (MainActivity.DEBUG) {
+        Log.d(
+            TAG,
+            "animateTextColor() called with: " +
+                "view = [" + this + "], duration = [" + duration + "], " +
+                "colorStart = [" + colorStart + "], colorEnd = [" + colorEnd + "]"
+        )
+    }
+    val viewPropertyAnimator = ValueAnimator.ofObject(ArgbEvaluator(), colorStart, colorEnd)
+    viewPropertyAnimator.interpolator = FastOutSlowInInterpolator()
+    viewPropertyAnimator.duration = duration
+    viewPropertyAnimator.addUpdateListener { setTextColor(it.animatedValue as Int) }
+    viewPropertyAnimator.addListener(object : AnimatorListenerAdapter() {
+        override fun onAnimationEnd(animation: Animator) {
+            setTextColor(colorEnd)
+        }
+
+        override fun onAnimationCancel(animation: Animator) {
+            setTextColor(colorEnd)
+        }
+    })
+    viewPropertyAnimator.start()
+}

app/src/main/java/org/schabi/newpipe/ktx/View.kt

@@ -0,0 +1,324 @@
+@file:JvmName("ViewUtils")
+
+package org.schabi.newpipe.ktx
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.animation.ArgbEvaluator
+import android.animation.ValueAnimator
+import android.content.res.ColorStateList
+import android.util.Log
+import android.view.View
+import androidx.annotation.ColorInt
+import androidx.annotation.FloatRange
+import androidx.core.view.ViewCompat
+import androidx.core.view.isGone
+import androidx.core.view.isInvisible
+import androidx.core.view.isVisible
+import androidx.interpolator.view.animation.FastOutSlowInInterpolator
+import org.schabi.newpipe.MainActivity
+
+private const val TAG = "ViewUtils"
+
+inline var View.backgroundTintListCompat: ColorStateList?
+    get() = ViewCompat.getBackgroundTintList(this)
+    set(value) = ViewCompat.setBackgroundTintList(this, value)
+
+/**
+ * Animate the view.
+ *
+ * @param enterOrExit   true to enter, false to exit
+ * @param duration      how long the animation will take, in milliseconds
+ * @param animationType Type of the animation
+ * @param delay         how long the animation will wait to start, in milliseconds
+ * @param execOnEnd     runnable that will be executed when the animation ends
+ */
+@JvmOverloads
+fun View.animate(
+    enterOrExit: Boolean,
+    duration: Long,
+    animationType: AnimationType = AnimationType.ALPHA,
+    delay: Long = 0,
+    execOnEnd: Runnable? = null
+) {
+    if (MainActivity.DEBUG) {
+        val id = try {
+            resources.getResourceEntryName(id)
+        } catch (e: Exception) {
+            id.toString() + ""
+        }
+        val msg = String.format(
+            "%8s →  [%s:%s] [%s %s:%s] execOnEnd=%s", enterOrExit,
+            javaClass.simpleName, id, animationType, duration, delay, execOnEnd
+        )
+        Log.d(TAG, "animate(): $msg")
+    }
+    if (isVisible && enterOrExit) {
+        if (MainActivity.DEBUG) {
+            Log.d(TAG, "animate(): view was already visible > view = [$this]")
+        }
+        animate().setListener(null).cancel()
+        isVisible = true
+        alpha = 1f
+        execOnEnd?.run()
+        return
+    } else if ((isGone || isInvisible) && !enterOrExit) {
+        if (MainActivity.DEBUG) {
+            Log.d(TAG, "animate(): view was already gone > view = [$this]")
+        }
+        animate().setListener(null).cancel()
+        isGone = true
+        alpha = 0f
+        execOnEnd?.run()
+        return
+    }
+    animate().setListener(null).cancel()
+    isVisible = true
+    when (animationType) {
+        AnimationType.ALPHA -> animateAlpha(enterOrExit, duration, delay, execOnEnd)
+        AnimationType.SCALE_AND_ALPHA -> animateScaleAndAlpha(enterOrExit, duration, delay, execOnEnd)
+        AnimationType.LIGHT_SCALE_AND_ALPHA -> animateLightScaleAndAlpha(enterOrExit, duration, delay, execOnEnd)
+        AnimationType.SLIDE_AND_ALPHA -> animateSlideAndAlpha(enterOrExit, duration, delay, execOnEnd)
+        AnimationType.LIGHT_SLIDE_AND_ALPHA -> animateLightSlideAndAlpha(enterOrExit, duration, delay, execOnEnd)
+    }
+}
+
+/**
+ * Animate the background color of a view.
+ *
+ * @param duration   the duration of the animation
+ * @param colorStart the background color to start with
+ * @param colorEnd   the background color to end with
+ */
+fun View.animateBackgroundColor(duration: Long, @ColorInt colorStart: Int, @ColorInt colorEnd: Int) {
+    if (MainActivity.DEBUG) {
+        Log.d(
+            TAG,
+            "animateBackgroundColor() called with: " +
+                "view = [" + this + "], duration = [" + duration + "], " +
+                "colorStart = [" + colorStart + "], colorEnd = [" + colorEnd + "]"
+        )
+    }
+    val empty = arrayOf(IntArray(0))
+    val viewPropertyAnimator = ValueAnimator.ofObject(ArgbEvaluator(), colorStart, colorEnd)
+    viewPropertyAnimator.interpolator = FastOutSlowInInterpolator()
+    viewPropertyAnimator.duration = duration
+    viewPropertyAnimator.addUpdateListener { animation: ValueAnimator ->
+        backgroundTintListCompat = ColorStateList(empty, intArrayOf(animation.animatedValue as Int))
+    }
+    viewPropertyAnimator.addListener(object : AnimatorListenerAdapter() {
+        override fun onAnimationEnd(animation: Animator) {
+            backgroundTintListCompat = ColorStateList(empty, intArrayOf(colorEnd))
+        }
+
+        override fun onAnimationCancel(animation: Animator) {
+            onAnimationEnd(animation)
+        }
+    })
+    viewPropertyAnimator.start()
+}
+
+fun View.animateHeight(duration: Long, targetHeight: Int): ValueAnimator {
+    if (MainActivity.DEBUG) {
+        Log.d(
+            TAG,
+            "animateHeight: duration = [" + duration + "], " +
+                "from " + height + " to → " + targetHeight + " in: " + this
+        )
+    }
+    val animator = ValueAnimator.ofFloat(height.toFloat(), targetHeight.toFloat())
+    animator.interpolator = FastOutSlowInInterpolator()
+    animator.duration = duration
+    animator.addUpdateListener { animation: ValueAnimator ->
+        val value = animation.animatedValue as Float
+        layoutParams.height = value.toInt()
+        requestLayout()
+    }
+    animator.addListener(object : AnimatorListenerAdapter() {
+        override fun onAnimationEnd(animation: Animator) {
+            layoutParams.height = targetHeight
+            requestLayout()
+        }
+
+        override fun onAnimationCancel(animation: Animator) {
+            layoutParams.height = targetHeight
+            requestLayout()
+        }
+    })
+    animator.start()
+    return animator
+}
+
+fun View.animateRotation(duration: Long, targetRotation: Int) {
+    if (MainActivity.DEBUG) {
+        Log.d(
+            TAG,
+            "animateRotation: duration = [" + duration + "], " +
+                "from " + rotation + " to → " + targetRotation + " in: " + this
+        )
+    }
+    animate().setListener(null).cancel()
+    animate()
+        .rotation(targetRotation.toFloat()).setDuration(duration)
+        .setInterpolator(FastOutSlowInInterpolator())
+        .setListener(object : AnimatorListenerAdapter() {
+            override fun onAnimationCancel(animation: Animator) {
+                rotation = targetRotation.toFloat()
+            }
+
+            override fun onAnimationEnd(animation: Animator) {
+                rotation = targetRotation.toFloat()
+            }
+        }).start()
+}
+
+private fun View.animateAlpha(enterOrExit: Boolean, duration: Long, delay: Long, execOnEnd: Runnable?) {
+    if (enterOrExit) {
+        animate().setInterpolator(FastOutSlowInInterpolator()).alpha(1f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    execOnEnd?.run()
+                }
+            }).start()
+    } else {
+        animate().setInterpolator(FastOutSlowInInterpolator()).alpha(0f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    isGone = true
+                    execOnEnd?.run()
+                }
+            }).start()
+    }
+}
+
+private fun View.animateScaleAndAlpha(enterOrExit: Boolean, duration: Long, delay: Long, execOnEnd: Runnable?) {
+    if (enterOrExit) {
+        scaleX = .8f
+        scaleY = .8f
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator())
+            .alpha(1f).scaleX(1f).scaleY(1f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    execOnEnd?.run()
+                }
+            }).start()
+    } else {
+        scaleX = 1f
+        scaleY = 1f
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator())
+            .alpha(0f).scaleX(.8f).scaleY(.8f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    isGone = true
+                    execOnEnd?.run()
+                }
+            }).start()
+    }
+}
+
+private fun View.animateLightScaleAndAlpha(enterOrExit: Boolean, duration: Long, delay: Long, execOnEnd: Runnable?) {
+    if (enterOrExit) {
+        alpha = .5f
+        scaleX = .95f
+        scaleY = .95f
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator())
+            .alpha(1f).scaleX(1f).scaleY(1f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    execOnEnd?.run()
+                }
+            }).start()
+    } else {
+        alpha = 1f
+        scaleX = 1f
+        scaleY = 1f
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator())
+            .alpha(0f).scaleX(.95f).scaleY(.95f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    isGone = true
+                    execOnEnd?.run()
+                }
+            }).start()
+    }
+}
+
+private fun View.animateSlideAndAlpha(enterOrExit: Boolean, duration: Long, delay: Long, execOnEnd: Runnable?) {
+    if (enterOrExit) {
+        translationY = -height.toFloat()
+        alpha = 0f
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator()).alpha(1f).translationY(0f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    execOnEnd?.run()
+                }
+            }).start()
+    } else {
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator())
+            .alpha(0f).translationY(-height.toFloat())
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    isGone = true
+                    execOnEnd?.run()
+                }
+            }).start()
+    }
+}
+
+private fun View.animateLightSlideAndAlpha(enterOrExit: Boolean, duration: Long, delay: Long, execOnEnd: Runnable?) {
+    if (enterOrExit) {
+        translationY = -height / 2.0f
+        alpha = 0f
+        animate()
+            .setInterpolator(FastOutSlowInInterpolator()).alpha(1f).translationY(0f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    execOnEnd?.run()
+                }
+            }).start()
+    } else {
+        animate().setInterpolator(FastOutSlowInInterpolator())
+            .alpha(0f).translationY(-height / 2.0f)
+            .setDuration(duration).setStartDelay(delay)
+            .setListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    isGone = true
+                    execOnEnd?.run()
+                }
+            }).start()
+    }
+}
+
+fun View.slideUp(duration: Long, delay: Long, @FloatRange(from = 0.0, to = 1.0) translationPercent: Float) {
+    val newTranslationY = (resources.displayMetrics.heightPixels * translationPercent).toInt()
+    animate().setListener(null).cancel()
+    alpha = 0f
+    translationY = newTranslationY.toFloat()
+    visibility = View.VISIBLE
+    animate()
+        .alpha(1f)
+        .translationY(0f)
+        .setStartDelay(delay)
+        .setDuration(duration)
+        .setInterpolator(FastOutSlowInInterpolator())
+        .start()
+}
+
+enum class AnimationType {
+    ALPHA, SCALE_AND_ALPHA, LIGHT_SCALE_AND_ALPHA, SLIDE_AND_ALPHA, LIGHT_SLIDE_AND_ALPHA
+}

app/src/main/java/org/schabi/newpipe/local/BaseLocalListFragment.java

@@ -24,7 +24,7 @@ import org.schabi.newpipe.databinding.PignateFooterBinding;
 import org.schabi.newpipe.fragments.BaseStateFragment;
 import org.schabi.newpipe.fragments.list.ListViewContract;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 
 /**
  * This fragment is design to be used with persistent data such as
@@ -185,10 +185,10 @@ public abstract class BaseLocalListFragment<I, N> extends BaseStateFragment<I>
     public void showLoading() {
         super.showLoading();
         if (itemsList != null) {
-            animateView(itemsList, false, 200);
+            animate(itemsList, false, 200);
         }
         if (headerRootBinding != null) {
-            animateView(headerRootBinding.getRoot(), false, 200);
+            animate(headerRootBinding.getRoot(), false, 200);
         }
     }
 
@@ -196,10 +196,10 @@ public abstract class BaseLocalListFragment<I, N> extends BaseStateFragment<I>
     public void hideLoading() {
         super.hideLoading();
         if (itemsList != null) {
-            animateView(itemsList, true, 200);
+            animate(itemsList, true, 200);
         }
         if (headerRootBinding != null) {
-            animateView(headerRootBinding.getRoot(), true, 200);
+            animate(headerRootBinding.getRoot(), true, 200);
         }
     }
 
@@ -209,10 +209,10 @@ public abstract class BaseLocalListFragment<I, N> extends BaseStateFragment<I>
         showListFooter(false);
 
         if (itemsList != null) {
-            animateView(itemsList, false, 200);
+            animate(itemsList, false, 200);
         }
         if (headerRootBinding != null) {
-            animateView(headerRootBinding.getRoot(), false, 200);
+            animate(headerRootBinding.getRoot(), false, 200);
         }
     }
 

app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt

@@ -42,9 +42,9 @@ import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.databinding.ErrorRetryBinding
 import org.schabi.newpipe.databinding.FragmentFeedBinding
 import org.schabi.newpipe.fragments.list.BaseListFragment
+import org.schabi.newpipe.ktx.animate
 import org.schabi.newpipe.local.feed.service.FeedLoadService
 import org.schabi.newpipe.report.UserAction
-import org.schabi.newpipe.util.AnimationUtils.animateView
 import org.schabi.newpipe.util.Localization
 import java.util.Calendar
 
@@ -180,50 +180,50 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
     // /////////////////////////////////////////////////////////////////////////
 
     override fun showLoading() {
-        animateView(feedBinding.refreshRootView, false, 0)
+        feedBinding.refreshRootView.animate(false, 0)
-        animateView(feedBinding.itemsList, false, 0)
+        feedBinding.itemsList.animate(false, 0)
 
-        animateView(feedBinding.loadingProgressBar, true, 200)
+        feedBinding.loadingProgressBar.animate(true, 200)
-        animateView(feedBinding.loadingProgressText, true, 200)
+        feedBinding.loadingProgressText.animate(true, 200)
 
-        animateView(feedBinding.emptyStateView.root, false, 0)
+        feedBinding.emptyStateView.root.animate(false, 0)
-        animateView(errorBinding.root, false, 0)
+        errorBinding.root.animate(false, 0)
     }
 
     override fun hideLoading() {
-        animateView(feedBinding.refreshRootView, true, 200)
+        feedBinding.refreshRootView.animate(true, 200)
-        animateView(feedBinding.itemsList, true, 300)
+        feedBinding.itemsList.animate(true, 300)
 
-        animateView(feedBinding.loadingProgressBar, false, 0)
+        feedBinding.loadingProgressBar.animate(false, 0)
-        animateView(feedBinding.loadingProgressText, false, 0)
+        feedBinding.loadingProgressText.animate(false, 0)
 
-        animateView(feedBinding.emptyStateView.root, false, 0)
+        feedBinding.emptyStateView.root.animate(false, 0)
-        animateView(errorBinding.root, false, 0)
+        errorBinding.root.animate(false, 0)
         feedBinding.swiperefresh.isRefreshing = false
     }
 
     override fun showEmptyState() {
-        animateView(feedBinding.refreshRootView, true, 200)
+        feedBinding.refreshRootView.animate(true, 200)
-        animateView(feedBinding.itemsList, false, 0)
+        feedBinding.itemsList.animate(false, 0)
 
-        animateView(feedBinding.loadingProgressBar, false, 0)
+        feedBinding.loadingProgressBar.animate(false, 0)
-        animateView(feedBinding.loadingProgressText, false, 0)
+        feedBinding.loadingProgressText.animate(false, 0)
 
-        animateView(feedBinding.emptyStateView.root, true, 800)
+        feedBinding.emptyStateView.root.animate(true, 800)
-        animateView(errorBinding.root, false, 0)
+        errorBinding.root.animate(false, 0)
     }
 
     override fun showError(message: String, showRetryButton: Boolean) {
         infoListAdapter.clearStreamItemList()
-        animateView(feedBinding.refreshRootView, false, 120)
+        feedBinding.refreshRootView.animate(false, 120)
-        animateView(feedBinding.itemsList, false, 120)
+        feedBinding.itemsList.animate(false, 120)
 
-        animateView(feedBinding.loadingProgressBar, false, 120)
+        feedBinding.loadingProgressBar.animate(false, 120)
-        animateView(feedBinding.loadingProgressText, false, 120)
+        feedBinding.loadingProgressText.animate(false, 120)
 
         errorBinding.errorMessageView.text = message
-        animateView(errorBinding.errorButtonRetry, showRetryButton, if (showRetryButton) 600 else 0)
+        errorBinding.errorButtonRetry.animate(showRetryButton, if (showRetryButton) 600 else 0)
-        animateView(errorBinding.root, true, 300)
+        errorBinding.root.animate(true, 300)
     }
 
     override fun handleResult(result: FeedState) {

app/src/main/java/org/schabi/newpipe/local/holder/LocalPlaylistStreamItemHolder.java

@@ -12,9 +12,9 @@ import org.schabi.newpipe.R;
 import org.schabi.newpipe.database.LocalItem;
 import org.schabi.newpipe.database.playlist.PlaylistStreamEntry;
 import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.ktx.ViewUtils;
 import org.schabi.newpipe.local.LocalItemBuilder;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.ImageDisplayConstants;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.views.AnimatedProgressBar;
@@ -117,10 +117,10 @@ public class LocalPlaylistStreamItemHolder extends LocalItemHolder {
             } else {
                 itemProgressView.setProgress((int) TimeUnit.MILLISECONDS
                         .toSeconds(item.getProgressTime()));
-                AnimationUtils.animateView(itemProgressView, true, 500);
+                ViewUtils.animate(itemProgressView, true, 500);
             }
         } else if (itemProgressView.getVisibility() == View.VISIBLE) {
-            AnimationUtils.animateView(itemProgressView, false, 500);
+            ViewUtils.animate(itemProgressView, false, 500);
         }
     }
 

app/src/main/java/org/schabi/newpipe/local/holder/LocalStatisticStreamItemHolder.java

@@ -12,9 +12,9 @@ import org.schabi.newpipe.R;
 import org.schabi.newpipe.database.LocalItem;
 import org.schabi.newpipe.database.stream.StreamStatisticsEntry;
 import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.ktx.ViewUtils;
 import org.schabi.newpipe.local.LocalItemBuilder;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.ImageDisplayConstants;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.views.AnimatedProgressBar;
@@ -148,10 +148,10 @@ public class LocalStatisticStreamItemHolder extends LocalItemHolder {
             } else {
                 itemProgressView.setProgress((int) TimeUnit.MILLISECONDS
                         .toSeconds(item.getProgressTime()));
-                AnimationUtils.animateView(itemProgressView, true, 500);
+                ViewUtils.animate(itemProgressView, true, 500);
             }
         } else if (itemProgressView.getVisibility() == View.VISIBLE) {
-            AnimationUtils.animateView(itemProgressView, false, 500);
+            ViewUtils.animate(itemProgressView, false, 500);
         }
     }
 }

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java

@@ -58,14 +58,14 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import icepick.State;
-import io.reactivex.rxjava3.core.Flowable;
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
 import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import io.reactivex.rxjava3.disposables.Disposable;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 import io.reactivex.rxjava3.subjects.PublishSubject;
 
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 
 public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistStreamEntry>, Void> {
     // Save the list 10 seconds after the last change occurred
@@ -201,8 +201,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     public void showLoading() {
         super.showLoading();
         if (headerBinding != null) {
-            animateView(headerBinding.getRoot(), false, 200);
+            animate(headerBinding.getRoot(), false, 200);
-            animateView(playlistControlBinding.getRoot(), false, 200);
+            animate(playlistControlBinding.getRoot(), false, 200);
         }
     }
 
@@ -210,8 +210,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     public void hideLoading() {
         super.hideLoading();
         if (headerBinding != null) {
-            animateView(headerBinding.getRoot(), true, 200);
+            animate(headerBinding.getRoot(), true, 200);
-            animateView(playlistControlBinding.getRoot(), true, 200);
+            animate(playlistControlBinding.getRoot(), true, 200);
         }
     }
 

app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionFragment.kt

@@ -36,6 +36,7 @@ import org.schabi.newpipe.databinding.DialogTitleBinding
 import org.schabi.newpipe.databinding.FragmentSubscriptionBinding
 import org.schabi.newpipe.extractor.channel.ChannelInfoItem
 import org.schabi.newpipe.fragments.BaseStateFragment
+import org.schabi.newpipe.ktx.animate
 import org.schabi.newpipe.local.subscription.SubscriptionViewModel.SubscriptionState
 import org.schabi.newpipe.local.subscription.dialog.FeedGroupDialog
 import org.schabi.newpipe.local.subscription.dialog.FeedGroupReorderDialog
@@ -56,7 +57,6 @@ import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService
 import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService.KEY_VALUE
 import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService.PREVIOUS_EXPORT_MODE
 import org.schabi.newpipe.report.UserAction
-import org.schabi.newpipe.util.AnimationUtils.animateView
 import org.schabi.newpipe.util.FilePickerActivityHelper
 import org.schabi.newpipe.util.NavigationHelper
 import org.schabi.newpipe.util.OnClickGesture
@@ -407,12 +407,12 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
 
     override fun showLoading() {
         super.showLoading()
-        animateView(binding.itemsList, false, 100)
+        binding.itemsList.animate(false, 100)
     }
 
     override fun hideLoading() {
         super.hideLoading()
-        animateView(binding.itemsList, true, 200)
+        binding.itemsList.animate(true, 200)
     }
 
     // /////////////////////////////////////////////////////////////////////////

app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedImportExportItem.kt

@@ -17,7 +17,7 @@ import kotlinx.android.synthetic.main.feed_import_export_group.import_from_optio
 import org.schabi.newpipe.R
 import org.schabi.newpipe.extractor.NewPipe
 import org.schabi.newpipe.extractor.exceptions.ExtractionException
-import org.schabi.newpipe.util.AnimationUtils
+import org.schabi.newpipe.ktx.animateRotation
 import org.schabi.newpipe.util.ServiceHelper
 import org.schabi.newpipe.util.ThemeHelper
 import org.schabi.newpipe.views.CollapsibleView
@@ -49,8 +49,7 @@ class FeedImportExportItem(
 
         expandIconListener?.let { viewHolder.import_export_options.removeListener(it) }
         expandIconListener = CollapsibleView.StateListener { newState ->
-            AnimationUtils.animateRotation(
+            viewHolder.import_export_expand_icon.animateRotation(
-                viewHolder.import_export_expand_icon,
                 250, if (newState == CollapsibleView.COLLAPSED) 0 else 180
             )
         }

app/src/main/java/org/schabi/newpipe/local/subscription/item/PickerSubscriptionItem.kt

@@ -9,8 +9,8 @@ import kotlinx.android.synthetic.main.picker_subscription_item.*
 import kotlinx.android.synthetic.main.picker_subscription_item.view.*
 import org.schabi.newpipe.R
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
-import org.schabi.newpipe.util.AnimationUtils
+import org.schabi.newpipe.ktx.AnimationType
-import org.schabi.newpipe.util.AnimationUtils.animateView
+import org.schabi.newpipe.ktx.animate
 import org.schabi.newpipe.util.ImageDisplayConstants
 
 data class PickerSubscriptionItem(
@@ -41,9 +41,6 @@ data class PickerSubscriptionItem(
 
     fun updateSelected(containerView: View, isSelected: Boolean) {
         this.isSelected = isSelected
-        animateView(
+        containerView.selected_highlight.animate(isSelected, 150, AnimationType.LIGHT_SCALE_AND_ALPHA)
-            containerView.selected_highlight,
-            AnimationUtils.Type.LIGHT_SCALE_AND_ALPHA, isSelected, 150
-        )
     }
 }

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -92,6 +92,7 @@ import org.schabi.newpipe.extractor.stream.VideoStream;
 import org.schabi.newpipe.fragments.OnScrollBelowItemsListener;
 import org.schabi.newpipe.fragments.detail.VideoDetailFragment;
 import org.schabi.newpipe.info_list.StreamSegmentAdapter;
+import org.schabi.newpipe.ktx.AnimationType;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
 import org.schabi.newpipe.player.MainPlayer.PlayerType;
 import org.schabi.newpipe.player.event.PlayerEventListener;
@@ -116,7 +117,6 @@ import org.schabi.newpipe.player.playqueue.PlayQueueItemTouchCallback;
 import org.schabi.newpipe.player.resolver.AudioPlaybackResolver;
 import org.schabi.newpipe.player.resolver.MediaSourceTag;
 import org.schabi.newpipe.player.resolver.VideoPlaybackResolver;
-import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.ImageDisplayConstants;
 import org.schabi.newpipe.util.KoreUtil;
@@ -150,6 +150,8 @@ import static com.google.android.exoplayer2.Player.REPEAT_MODE_ONE;
 import static com.google.android.exoplayer2.Player.RepeatMode;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
+import static org.schabi.newpipe.ktx.ViewUtils.animateRotation;
 import static org.schabi.newpipe.player.MainPlayer.ACTION_CLOSE;
 import static org.schabi.newpipe.player.MainPlayer.ACTION_FAST_FORWARD;
 import static org.schabi.newpipe.player.MainPlayer.ACTION_FAST_REWIND;
@@ -176,9 +178,6 @@ import static org.schabi.newpipe.player.helper.PlayerHelper.retrievePlayerTypeFr
 import static org.schabi.newpipe.player.helper.PlayerHelper.retrievePopupLayoutParamsFromPrefs;
 import static org.schabi.newpipe.player.helper.PlayerHelper.retrieveSeekDurationFromPreferences;
 import static org.schabi.newpipe.player.helper.PlayerHelper.savePlaybackParametersToPrefs;
-import static org.schabi.newpipe.util.AnimationUtils.Type.SLIDE_AND_ALPHA;
-import static org.schabi.newpipe.util.AnimationUtils.animateRotation;
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
 import static org.schabi.newpipe.util.ListHelper.getPopupResolutionIndex;
 import static org.schabi.newpipe.util.ListHelper.getResolutionIndex;
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
@@ -1560,8 +1559,8 @@ public final class Player implements
         }
 
         showControls(0);
-        animateView(binding.currentDisplaySeek, AnimationUtils.Type.SCALE_AND_ALPHA, true,
+        animate(binding.currentDisplaySeek, true, DEFAULT_CONTROLS_DURATION,
-                DEFAULT_CONTROLS_DURATION);
+                AnimationType.SCALE_AND_ALPHA);
     }
 
     @Override // seekbar listener
@@ -1576,7 +1575,7 @@ public final class Player implements
         }
 
         binding.playbackCurrentTime.setText(getTimeString(seekBar.getProgress()));
-        animateView(binding.currentDisplaySeek, AnimationUtils.Type.SCALE_AND_ALPHA, false, 200);
+        animate(binding.currentDisplaySeek, false, 200, AnimationType.SCALE_AND_ALPHA);
 
         if (currentState == STATE_PAUSED_SEEK) {
             changeState(STATE_BUFFERING);
@@ -1682,8 +1681,8 @@ public final class Player implements
                 : DPAD_CONTROLS_HIDE_TIME;
 
         showHideShadow(true, DEFAULT_CONTROLS_DURATION);
-        animateView(binding.playbackControlRoot, true, DEFAULT_CONTROLS_DURATION, 0,
+        animate(binding.playbackControlRoot, true, DEFAULT_CONTROLS_DURATION,
-                () -> hideControls(DEFAULT_CONTROLS_DURATION, hideTime));
+                AnimationType.ALPHA, 0, () -> hideControls(DEFAULT_CONTROLS_DURATION, hideTime));
     }
 
     public void showControls(final long duration) {
@@ -1694,7 +1693,7 @@ public final class Player implements
         showSystemUIPartially();
         controlsVisibilityHandler.removeCallbacksAndMessages(null);
         showHideShadow(true, duration);
-        animateView(binding.playbackControlRoot, true, duration);
+        animate(binding.playbackControlRoot, true, duration);
     }
 
     public void hideControls(final long duration, final long delay) {
@@ -1708,14 +1707,14 @@ public final class Player implements
         controlsVisibilityHandler.removeCallbacksAndMessages(null);
         controlsVisibilityHandler.postDelayed(() -> {
             showHideShadow(false, duration);
-            animateView(binding.playbackControlRoot, false, duration, 0,
+            animate(binding.playbackControlRoot, false, duration, AnimationType.ALPHA,
-                    this::hideSystemUIIfNeeded);
+                    0, this::hideSystemUIIfNeeded);
         }, delay);
     }
 
     private void showHideShadow(final boolean show, final long duration) {
-        animateView(binding.playerTopShadow, show, duration, 0, null);
+        animate(binding.playerTopShadow, show, duration, AnimationType.ALPHA, 0, null);
-        animateView(binding.playerBottomShadow, show, duration, 0, null);
+        animate(binding.playerBottomShadow, show, duration, AnimationType.ALPHA, 0, null);
     }
 
     private void showOrHideButtons() {
@@ -1913,15 +1912,15 @@ public final class Player implements
         }
 
         controlsVisibilityHandler.removeCallbacksAndMessages(null);
-        animateView(binding.playbackControlRoot, false, DEFAULT_CONTROLS_DURATION);
+        animate(binding.playbackControlRoot, false, DEFAULT_CONTROLS_DURATION);
 
         binding.playbackSeekBar.setEnabled(false);
         binding.playbackSeekBar.getThumb()
                 .setColorFilter(new PorterDuffColorFilter(Color.RED, PorterDuff.Mode.SRC_IN));
 
         binding.loadingPanel.setBackgroundColor(Color.BLACK);
-        animateView(binding.loadingPanel, true, 0);
+        animate(binding.loadingPanel, true, 0);
-        animateView(binding.surfaceForeground, true, 100);
+        animate(binding.surfaceForeground, true, 100);
 
         binding.playPauseButton.setImageResource(R.drawable.ic_play_arrow_white_24dp);
         animatePlayButtons(false, 100);
@@ -1948,9 +1947,9 @@ public final class Player implements
 
         binding.loadingPanel.setVisibility(View.GONE);
 
-        animateView(binding.currentDisplaySeek, AnimationUtils.Type.SCALE_AND_ALPHA, false, 200);
+        animate(binding.currentDisplaySeek, false, 200, AnimationType.SCALE_AND_ALPHA);
 
-        animateView(binding.playPauseButton, AnimationUtils.Type.SCALE_AND_ALPHA, false, 80, 0,
+        animate(binding.playPauseButton, false, 80, AnimationType.SCALE_AND_ALPHA, 0,
                 () -> {
                     binding.playPauseButton.setImageResource(R.drawable.ic_pause_white_24dp);
                     animatePlayButtons(true, 200);
@@ -1991,7 +1990,7 @@ public final class Player implements
         showControls(400);
         binding.loadingPanel.setVisibility(View.GONE);
 
-        animateView(binding.playPauseButton, AnimationUtils.Type.SCALE_AND_ALPHA, false, 80, 0,
+        animate(binding.playPauseButton, false, 80, AnimationType.SCALE_AND_ALPHA, 0,
                 () -> {
                     binding.playPauseButton.setImageResource(R.drawable.ic_play_arrow_white_24dp);
                     animatePlayButtons(true, 200);
@@ -2029,7 +2028,7 @@ public final class Player implements
             Log.d(TAG, "onCompleted() called");
         }
 
-        animateView(binding.playPauseButton, AnimationUtils.Type.SCALE_AND_ALPHA, false, 0, 0,
+        animate(binding.playPauseButton, false, 0, AnimationType.SCALE_AND_ALPHA, 0,
                 () -> {
                     binding.playPauseButton.setImageResource(R.drawable.ic_replay_white_24dp);
                     animatePlayButtons(true, DEFAULT_CONTROLS_DURATION);
@@ -2051,13 +2050,13 @@ public final class Player implements
         }
 
         showControls(500);
-        animateView(binding.currentDisplaySeek, AnimationUtils.Type.SCALE_AND_ALPHA, false, 200);
+        animate(binding.currentDisplaySeek, false, 200, AnimationType.SCALE_AND_ALPHA);
         binding.loadingPanel.setVisibility(View.GONE);
-        animateView(binding.surfaceForeground, true, 100);
+        animate(binding.surfaceForeground, true, 100);
     }
 
     private void animatePlayButtons(final boolean show, final int duration) {
-        animateView(binding.playPauseButton, AnimationUtils.Type.SCALE_AND_ALPHA, show, duration);
+        animate(binding.playPauseButton, show, duration, AnimationType.SCALE_AND_ALPHA);
 
         boolean showQueueButtons = show;
         if (playQueue == null) {
@@ -2065,18 +2064,18 @@ public final class Player implements
         }
 
         if (!showQueueButtons || playQueue.getIndex() > 0) {
-            animateView(
+            animate(
                     binding.playPreviousButton,
-                    AnimationUtils.Type.SCALE_AND_ALPHA,
                     showQueueButtons,
-                    duration);
+                    duration,
+                    AnimationType.SCALE_AND_ALPHA);
         }
         if (!showQueueButtons || playQueue.getIndex() + 1 < playQueue.getStreams().size()) {
-            animateView(
+            animate(
                     binding.playNextButton,
-                    AnimationUtils.Type.SCALE_AND_ALPHA,
                     showQueueButtons,
-                    duration);
+                    duration,
+                    AnimationType.SCALE_AND_ALPHA);
         }
     }
     //endregion
@@ -2274,7 +2273,7 @@ public final class Player implements
     @Override
     public void onRenderedFirstFrame() {
         //TODO check if this causes black screen when switching to fullscreen
-        animateView(binding.surfaceForeground, false, DEFAULT_CONTROLS_DURATION);
+        animate(binding.surfaceForeground, false, DEFAULT_CONTROLS_DURATION);
     }
     //endregion
 
@@ -2871,8 +2870,8 @@ public final class Player implements
 
         hideControls(0, 0);
         binding.itemsListPanel.requestFocus();
-        animateView(binding.itemsListPanel, SLIDE_AND_ALPHA, true,
+        animate(binding.itemsListPanel, true, DEFAULT_CONTROLS_DURATION,
-                DEFAULT_CONTROLS_DURATION);
+                AnimationType.SLIDE_AND_ALPHA);
 
         binding.itemsList.scrollToPosition(playQueue.getIndex());
     }
@@ -2905,8 +2904,8 @@ public final class Player implements
 
         hideControls(0, 0);
         binding.itemsListPanel.requestFocus();
-        animateView(binding.itemsListPanel, SLIDE_AND_ALPHA, true,
+        animate(binding.itemsListPanel, true, DEFAULT_CONTROLS_DURATION,
-                DEFAULT_CONTROLS_DURATION);
+                AnimationType.SLIDE_AND_ALPHA);
 
         final int adapterPosition = getNearestStreamSegmentPosition(simpleExoPlayer
                 .getCurrentPosition());
@@ -2942,8 +2941,8 @@ public final class Player implements
                 itemTouchHelper.attachToRecyclerView(null);
             }
 
-            animateView(binding.itemsListPanel, SLIDE_AND_ALPHA, false,
+            animate(binding.itemsListPanel, false, DEFAULT_CONTROLS_DURATION,
-                    DEFAULT_CONTROLS_DURATION, 0, () -> {
+                    AnimationType.SLIDE_AND_ALPHA, 0, () -> {
                         // Even when queueLayout is GONE it receives touch events
                         // and ruins normal behavior of the app. This line fixes it
                         binding.itemsListPanel.setTranslationY(
@@ -3451,7 +3450,8 @@ public final class Player implements
         if (currentState != STATE_COMPLETED) {
             controlsVisibilityHandler.removeCallbacksAndMessages(null);
             showHideShadow(true, DEFAULT_CONTROLS_DURATION);
-            animateView(binding.playbackControlRoot, true, DEFAULT_CONTROLS_DURATION, 0, () -> {
+            animate(binding.playbackControlRoot, true, DEFAULT_CONTROLS_DURATION,
+                    AnimationType.ALPHA, 0, () -> {
                         if (currentState == STATE_PLAYING && !isSomePopupMenuVisible) {
                             if (v.getId() == binding.playPauseButton.getId()
                                     // Hide controls in fullscreen immediately
@@ -3531,9 +3531,8 @@ public final class Player implements
 
         animateRotation(binding.moreOptionsButton, DEFAULT_CONTROLS_DURATION,
                 isMoreControlsVisible ? 0 : 180);
-        animateView(binding.secondaryControls, SLIDE_AND_ALPHA, !isMoreControlsVisible,
+        animate(binding.secondaryControls, !isMoreControlsVisible, DEFAULT_CONTROLS_DURATION,
-                DEFAULT_CONTROLS_DURATION, 0,
+                AnimationType.SLIDE_AND_ALPHA, 0, () -> {
-                () -> {
                     // Fix for a ripple effect on background drawable.
                     // When view returns from GONE state it takes more milliseconds than returning
                     // from INVISIBLE state. And the delay makes ripple background end to fast

app/src/main/java/org/schabi/newpipe/player/event/BasePlayerGestureListener.kt

@@ -7,11 +7,11 @@ import android.view.GestureDetector
 import android.view.MotionEvent
 import android.view.View
 import android.view.ViewConfiguration
+import org.schabi.newpipe.ktx.animate
 import org.schabi.newpipe.player.MainPlayer
 import org.schabi.newpipe.player.Player
 import org.schabi.newpipe.player.helper.PlayerHelper
 import org.schabi.newpipe.player.helper.PlayerHelper.savePopupPositionAndSizeToPrefs
-import org.schabi.newpipe.util.AnimationUtils
 import kotlin.math.abs
 import kotlin.math.hypot
 import kotlin.math.max
@@ -364,7 +364,7 @@ abstract class BasePlayerGestureListener(
         }
 
         if (!isMovingInPopup) {
-            AnimationUtils.animateView(player.closeOverlayButton, true, 200)
+            player.closeOverlayButton.animate(true, 200)
         }
 
         isMovingInPopup = true

app/src/main/java/org/schabi/newpipe/player/event/PlayerGestureListener.java

@@ -17,11 +17,12 @@ import org.schabi.newpipe.player.MainPlayer;
 import org.schabi.newpipe.player.Player;
 import org.schabi.newpipe.player.helper.PlayerHelper;
 
-import static org.schabi.newpipe.player.Player.STATE_PLAYING;
+import static org.schabi.newpipe.ktx.AnimationType.ALPHA;
+import static org.schabi.newpipe.ktx.AnimationType.SCALE_AND_ALPHA;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.player.Player.DEFAULT_CONTROLS_DURATION;
 import static org.schabi.newpipe.player.Player.DEFAULT_CONTROLS_HIDE_TIME;
-import static org.schabi.newpipe.util.AnimationUtils.Type.SCALE_AND_ALPHA;
+import static org.schabi.newpipe.player.Player.STATE_PLAYING;
-import static org.schabi.newpipe.util.AnimationUtils.animateView;
 
 /**
  * GestureListener for the player
@@ -123,11 +124,11 @@ public class PlayerGestureListener
             final View closingOverlayView = player.getClosingOverlayView();
             if (player.isInsideClosingRadius(movingEvent)) {
                 if (closingOverlayView.getVisibility() == View.GONE) {
-                    animateView(closingOverlayView, true, 250);
+                    animate(closingOverlayView, true, 250);
                 }
             } else {
                 if (closingOverlayView.getVisibility() == View.VISIBLE) {
-                    animateView(closingOverlayView, false, 0);
+                    animate(closingOverlayView, false, 0);
                 }
             }
         }
@@ -153,7 +154,7 @@ public class PlayerGestureListener
         );
 
         if (player.getVolumeRelativeLayout().getVisibility() != View.VISIBLE) {
-            animateView(player.getVolumeRelativeLayout(), SCALE_AND_ALPHA, true, 200);
+            animate(player.getVolumeRelativeLayout(), true, 200, SCALE_AND_ALPHA);
         }
         if (player.getBrightnessRelativeLayout().getVisibility() == View.VISIBLE) {
             player.getBrightnessRelativeLayout().setVisibility(View.GONE);
@@ -195,7 +196,7 @@ public class PlayerGestureListener
         );
 
         if (player.getBrightnessRelativeLayout().getVisibility() != View.VISIBLE) {
-            animateView(player.getBrightnessRelativeLayout(), SCALE_AND_ALPHA, true, 200);
+            animate(player.getBrightnessRelativeLayout(), true, 200, SCALE_AND_ALPHA);
         }
         if (player.getVolumeRelativeLayout().getVisibility() == View.VISIBLE) {
             player.getVolumeRelativeLayout().setVisibility(View.GONE);
@@ -215,21 +216,18 @@ public class PlayerGestureListener
             }
 
             if (player.getVolumeRelativeLayout().getVisibility() == View.VISIBLE) {
-                animateView(player.getVolumeRelativeLayout(), SCALE_AND_ALPHA,
+                animate(player.getVolumeRelativeLayout(), false, 200, SCALE_AND_ALPHA,
-                        false, 200, 200);
+                        200);
             }
             if (player.getBrightnessRelativeLayout().getVisibility() == View.VISIBLE) {
-                animateView(player.getBrightnessRelativeLayout(), SCALE_AND_ALPHA,
+                animate(player.getBrightnessRelativeLayout(), false, 200, SCALE_AND_ALPHA,
-                        false, 200, 200);
+                        200);
             }
 
             if (player.isControlsVisible() && player.getCurrentState() == STATE_PLAYING) {
                 player.hideControls(DEFAULT_CONTROLS_DURATION, DEFAULT_CONTROLS_HIDE_TIME);
             }
         } else {
-            if (player == null) {
-                return;
-            }
             if (player.isControlsVisible() && player.getCurrentState() == STATE_PLAYING) {
                 player.hideControls(DEFAULT_CONTROLS_DURATION, DEFAULT_CONTROLS_HIDE_TIME);
             }
@@ -237,10 +235,10 @@ public class PlayerGestureListener
             if (player.isInsideClosingRadius(event)) {
                 player.closePopup();
             } else {
-                animateView(player.getClosingOverlayView(), false, 0);
+                animate(player.getClosingOverlayView(), false, 0);
 
                 if (!player.isPopupClosing()) {
-                    animateView(player.getCloseOverlayButton(), false, 200);
+                    animate(player.getCloseOverlayButton(), false, 200);
                 }
             }
         }
@@ -255,8 +253,8 @@ public class PlayerGestureListener
         player.getLoadingPanel().setVisibility(View.GONE);
 
         player.hideControls(0, 0);
-        animateView(player.getCurrentDisplaySeek(), false, 0, 0);
+        animate(player.getCurrentDisplaySeek(), false, 0, ALPHA, 0);
-        animateView(player.getResizingIndicator(), true, 200, 0);
+        animate(player.getResizingIndicator(), true, 200, ALPHA, 0);
     }
 
     @Override
@@ -264,7 +262,7 @@ public class PlayerGestureListener
         if (DEBUG) {
             Log.d(TAG, "onPopupResizingEnd called");
         }
-        animateView(player.getResizingIndicator(), false, 100, 0);
+        animate(player.getResizingIndicator(), false, 100, ALPHA, 0);
     }
 }
 

app/src/main/java/org/schabi/newpipe/util/AnimationUtils.java

@@ -1,478 +0,0 @@
-/*
- * Copyright 2018 Mauricio Colli <mauriciocolli@outlook.com>
- * AnimationUtils.java is part of NewPipe
- *
- * License: GPL-3.0+
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.schabi.newpipe.util;
-
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.animation.ArgbEvaluator;
-import android.animation.ValueAnimator;
-import android.content.res.ColorStateList;
-import android.util.Log;
-import android.view.View;
-import android.widget.TextView;
-
-import androidx.annotation.ColorInt;
-import androidx.annotation.FloatRange;
-import androidx.core.view.ViewCompat;
-import androidx.interpolator.view.animation.FastOutSlowInInterpolator;
-
-import org.schabi.newpipe.MainActivity;
-
-public final class AnimationUtils {
-    private static final String TAG = "AnimationUtils";
-    private static final boolean DEBUG = MainActivity.DEBUG;
-
-    private AnimationUtils() { }
-
-    public static void animateView(final View view, final boolean enterOrExit,
-                                   final long duration) {
-        animateView(view, Type.ALPHA, enterOrExit, duration, 0, null);
-    }
-
-    public static void animateView(final View view, final boolean enterOrExit,
-                                   final long duration, final long delay) {
-        animateView(view, Type.ALPHA, enterOrExit, duration, delay, null);
-    }
-
-    public static void animateView(final View view, final boolean enterOrExit, final long duration,
-                                   final long delay, final Runnable execOnEnd) {
-        animateView(view, Type.ALPHA, enterOrExit, duration, delay, execOnEnd);
-    }
-
-    public static void animateView(final View view, final Type animationType,
-                                   final boolean enterOrExit, final long duration) {
-        animateView(view, animationType, enterOrExit, duration, 0, null);
-    }
-
-    public static void animateView(final View view, final Type animationType,
-                                   final boolean enterOrExit, final long duration,
-                                   final long delay) {
-        animateView(view, animationType, enterOrExit, duration, delay, null);
-    }
-
-    /**
-     * Animate the view.
-     *
-     * @param view          view that will be animated
-     * @param animationType {@link Type} of the animation
-     * @param enterOrExit   true to enter, false to exit
-     * @param duration      how long the animation will take, in milliseconds
-     * @param delay         how long the animation will wait to start, in milliseconds
-     * @param execOnEnd     runnable that will be executed when the animation ends
-     */
-    public static void animateView(final View view, final Type animationType,
-                                   final boolean enterOrExit, final long duration,
-                                   final long delay, final Runnable execOnEnd) {
-        if (DEBUG) {
-            String id;
-            try {
-                id = view.getResources().getResourceEntryName(view.getId());
-            } catch (final Exception e) {
-                id = view.getId() + "";
-            }
-
-            final String msg = String.format("%8s →  [%s:%s] [%s %s:%s] execOnEnd=%s", enterOrExit,
-                    view.getClass().getSimpleName(), id, animationType, duration, delay, execOnEnd);
-            Log.d(TAG, "animateView()" + msg);
-        }
-
-        if (view.getVisibility() == View.VISIBLE && enterOrExit) {
-            if (DEBUG) {
-                Log.d(TAG, "animateView() view was already visible > view = [" + view + "]");
-            }
-            view.animate().setListener(null).cancel();
-            view.setVisibility(View.VISIBLE);
-            view.setAlpha(1f);
-            if (execOnEnd != null) {
-                execOnEnd.run();
-            }
-            return;
-        } else if ((view.getVisibility() == View.GONE || view.getVisibility() == View.INVISIBLE)
-                && !enterOrExit) {
-            if (DEBUG) {
-                Log.d(TAG, "animateView() view was already gone > view = [" + view + "]");
-            }
-            view.animate().setListener(null).cancel();
-            view.setVisibility(View.GONE);
-            view.setAlpha(0f);
-            if (execOnEnd != null) {
-                execOnEnd.run();
-            }
-            return;
-        }
-
-        view.animate().setListener(null).cancel();
-        view.setVisibility(View.VISIBLE);
-
-        switch (animationType) {
-            case ALPHA:
-                animateAlpha(view, enterOrExit, duration, delay, execOnEnd);
-                break;
-            case SCALE_AND_ALPHA:
-                animateScaleAndAlpha(view, enterOrExit, duration, delay, execOnEnd);
-                break;
-            case LIGHT_SCALE_AND_ALPHA:
-                animateLightScaleAndAlpha(view, enterOrExit, duration, delay, execOnEnd);
-                break;
-            case SLIDE_AND_ALPHA:
-                animateSlideAndAlpha(view, enterOrExit, duration, delay, execOnEnd);
-                break;
-            case LIGHT_SLIDE_AND_ALPHA:
-                animateLightSlideAndAlpha(view, enterOrExit, duration, delay, execOnEnd);
-                break;
-        }
-    }
-
-    /**
-     * Animate the background color of a view.
-     *
-     * @param view       the view to animate
-     * @param duration   the duration of the animation
-     * @param colorStart the background color to start with
-     * @param colorEnd   the background color to end with
-     */
-    public static void animateBackgroundColor(final View view, final long duration,
-                                              @ColorInt final int colorStart,
-                                              @ColorInt final int colorEnd) {
-        if (DEBUG) {
-            Log.d(TAG, "animateBackgroundColor() called with: "
-                    + "view = [" + view + "], duration = [" + duration + "], "
-                    + "colorStart = [" + colorStart + "], colorEnd = [" + colorEnd + "]");
-        }
-
-        final int[][] empty = {new int[0]};
-        final ValueAnimator viewPropertyAnimator = ValueAnimator
-                .ofObject(new ArgbEvaluator(), colorStart, colorEnd);
-        viewPropertyAnimator.setInterpolator(new FastOutSlowInInterpolator());
-        viewPropertyAnimator.setDuration(duration);
-        viewPropertyAnimator.addUpdateListener(animation ->
-                ViewCompat.setBackgroundTintList(view,
-                        new ColorStateList(empty, new int[]{(int) animation.getAnimatedValue()})));
-        viewPropertyAnimator.addListener(new AnimatorListenerAdapter() {
-            @Override
-            public void onAnimationEnd(final Animator animation) {
-                ViewCompat.setBackgroundTintList(view,
-                        new ColorStateList(empty, new int[]{colorEnd}));
-            }
-
-            @Override
-            public void onAnimationCancel(final Animator animation) {
-                onAnimationEnd(animation);
-            }
-        });
-        viewPropertyAnimator.start();
-    }
-
-    /**
-     * Animate the text color of any view that extends {@link TextView} (Buttons, EditText...).
-     *
-     * @param view       the text view to animate
-     * @param duration   the duration of the animation
-     * @param colorStart the text color to start with
-     * @param colorEnd   the text color to end with
-     */
-    public static void animateTextColor(final TextView view, final long duration,
-                                        @ColorInt final int colorStart,
-                                        @ColorInt final int colorEnd) {
-        if (DEBUG) {
-            Log.d(TAG, "animateTextColor() called with: "
-                    + "view = [" + view + "], duration = [" + duration + "], "
-                    + "colorStart = [" + colorStart + "], colorEnd = [" + colorEnd + "]");
-        }
-
-        final ValueAnimator viewPropertyAnimator = ValueAnimator
-                .ofObject(new ArgbEvaluator(), colorStart, colorEnd);
-        viewPropertyAnimator.setInterpolator(new FastOutSlowInInterpolator());
-        viewPropertyAnimator.setDuration(duration);
-        viewPropertyAnimator.addUpdateListener(animation ->
-                view.setTextColor((int) animation.getAnimatedValue()));
-        viewPropertyAnimator.addListener(new AnimatorListenerAdapter() {
-            @Override
-            public void onAnimationEnd(final Animator animation) {
-                view.setTextColor(colorEnd);
-            }
-
-            @Override
-            public void onAnimationCancel(final Animator animation) {
-                view.setTextColor(colorEnd);
-            }
-        });
-        viewPropertyAnimator.start();
-    }
-
-    public static ValueAnimator animateHeight(final View view, final long duration,
-                                              final int targetHeight) {
-        final int height = view.getHeight();
-        if (DEBUG) {
-            Log.d(TAG, "animateHeight: duration = [" + duration + "], "
-                    + "from " + height + " to → " + targetHeight + " in: " + view);
-        }
-
-        final ValueAnimator animator = ValueAnimator.ofFloat(height, targetHeight);
-        animator.setInterpolator(new FastOutSlowInInterpolator());
-        animator.setDuration(duration);
-        animator.addUpdateListener(animation -> {
-            final float value = (float) animation.getAnimatedValue();
-            view.getLayoutParams().height = (int) value;
-            view.requestLayout();
-        });
-        animator.addListener(new AnimatorListenerAdapter() {
-            @Override
-            public void onAnimationEnd(final Animator animation) {
-                view.getLayoutParams().height = targetHeight;
-                view.requestLayout();
-            }
-
-            @Override
-            public void onAnimationCancel(final Animator animation) {
-                view.getLayoutParams().height = targetHeight;
-                view.requestLayout();
-            }
-        });
-        animator.start();
-
-        return animator;
-    }
-
-    public static void animateRotation(final View view, final long duration,
-                                       final int targetRotation) {
-        if (DEBUG) {
-            Log.d(TAG, "animateRotation: duration = [" + duration + "], "
-                    + "from " + view.getRotation() + " to → " + targetRotation + " in: " + view);
-        }
-        view.animate().setListener(null).cancel();
-
-        view.animate()
-                .rotation(targetRotation).setDuration(duration)
-                .setInterpolator(new FastOutSlowInInterpolator())
-                .setListener(new AnimatorListenerAdapter() {
-                    @Override
-                    public void onAnimationCancel(final Animator animation) {
-                        view.setRotation(targetRotation);
-                    }
-
-                    @Override
-                    public void onAnimationEnd(final Animator animation) {
-                        view.setRotation(targetRotation);
-                    }
-                }).start();
-    }
-
-    private static void animateAlpha(final View view, final boolean enterOrExit,
-                                     final long duration, final long delay,
-                                     final Runnable execOnEnd) {
-        if (enterOrExit) {
-            view.animate().setInterpolator(new FastOutSlowInInterpolator()).alpha(1f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        } else {
-            view.animate().setInterpolator(new FastOutSlowInInterpolator()).alpha(0f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    view.setVisibility(View.GONE);
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        }
-    }
-
-    /*//////////////////////////////////////////////////////////////////////////
-    // Internals
-    //////////////////////////////////////////////////////////////////////////*/
-
-    private static void animateScaleAndAlpha(final View view, final boolean enterOrExit,
-                                             final long duration, final long delay,
-                                             final Runnable execOnEnd) {
-        if (enterOrExit) {
-            view.setScaleX(.8f);
-            view.setScaleY(.8f);
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(1f).scaleX(1f).scaleY(1f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        } else {
-            view.setScaleX(1f);
-            view.setScaleY(1f);
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(0f).scaleX(.8f).scaleY(.8f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    view.setVisibility(View.GONE);
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        }
-    }
-
-    private static void animateLightScaleAndAlpha(final View view, final boolean enterOrExit,
-                                                  final long duration, final long delay,
-                                                  final Runnable execOnEnd) {
-        if (enterOrExit) {
-            view.setAlpha(.5f);
-            view.setScaleX(.95f);
-            view.setScaleY(.95f);
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(1f).scaleX(1f).scaleY(1f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        } else {
-            view.setAlpha(1f);
-            view.setScaleX(1f);
-            view.setScaleY(1f);
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(0f).scaleX(.95f).scaleY(.95f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    view.setVisibility(View.GONE);
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        }
-    }
-
-    private static void animateSlideAndAlpha(final View view, final boolean enterOrExit,
-                                             final long duration, final long delay,
-                                             final Runnable execOnEnd) {
-        if (enterOrExit) {
-            view.setTranslationY(-view.getHeight());
-            view.setAlpha(0f);
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator()).alpha(1f).translationY(0)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        } else {
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(0f).translationY(-view.getHeight())
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    view.setVisibility(View.GONE);
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        }
-    }
-
-    private static void animateLightSlideAndAlpha(final View view, final boolean enterOrExit,
-                                                  final long duration, final long delay,
-                                                  final Runnable execOnEnd) {
-        if (enterOrExit) {
-            view.setTranslationY(-view.getHeight() / 2.0f);
-            view.setAlpha(0f);
-            view.animate()
-                    .setInterpolator(new FastOutSlowInInterpolator()).alpha(1f).translationY(0)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        } else {
-            view.animate().setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(0f).translationY(-view.getHeight() / 2.0f)
-                    .setDuration(duration).setStartDelay(delay)
-                    .setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(final Animator animation) {
-                    view.setVisibility(View.GONE);
-                    if (execOnEnd != null) {
-                        execOnEnd.run();
-                    }
-                }
-            }).start();
-        }
-    }
-
-    public static void slideUp(final View view, final long duration, final long delay,
-                               @FloatRange(from = 0.0f, to = 1.0f)
-                               final float translationPercent) {
-        final int translationY = (int) (view.getResources().getDisplayMetrics().heightPixels
-                * (translationPercent));
-
-        view.animate().setListener(null).cancel();
-        view.setAlpha(0f);
-        view.setTranslationY(translationY);
-        view.setVisibility(View.VISIBLE);
-        view.animate()
-                .alpha(1f)
-                .translationY(0)
-                .setStartDelay(delay)
-                .setDuration(duration)
-                .setInterpolator(new FastOutSlowInInterpolator())
-                .start();
-    }
-
-    public enum Type {
-        ALPHA,
-        SCALE_AND_ALPHA, LIGHT_SCALE_AND_ALPHA,
-        SLIDE_AND_ALPHA, LIGHT_SLIDE_AND_ALPHA
-    }
-}

app/src/main/java/org/schabi/newpipe/views/CollapsibleView.java

@@ -31,7 +31,7 @@ import androidx.annotation.IntDef;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 
-import org.schabi.newpipe.util.AnimationUtils;
+import org.schabi.newpipe.ktx.ViewUtils;
 
 import java.lang.annotation.Retention;
 import java.util.ArrayList;
@@ -128,7 +128,7 @@ public class CollapsibleView extends LinearLayout {
         if (currentAnimator != null && currentAnimator.isRunning()) {
             currentAnimator.cancel();
         }
-        currentAnimator = AnimationUtils.animateHeight(this, ANIMATION_DURATION, 0);
+        currentAnimator = ViewUtils.animateHeight(this, ANIMATION_DURATION, 0);
 
         setCurrentState(COLLAPSED);
     }
@@ -151,7 +151,7 @@ public class CollapsibleView extends LinearLayout {
         if (currentAnimator != null && currentAnimator.isRunning()) {
             currentAnimator.cancel();
         }
-        currentAnimator = AnimationUtils.animateHeight(this, ANIMATION_DURATION, this.targetHeight);
+        currentAnimator = ViewUtils.animateHeight(this, ANIMATION_DURATION, this.targetHeight);
         setCurrentState(EXPANDED);
     }