-Fixed NPE issues when button views are clicked on local playlist and statistics playlist fragments are out of focus.

-Added disk cache size limit for image loader.
-Fixed button names for playlist rename dialog.

app/src/main/java/org/schabi/newpipe/App.java

@@ -11,8 +11,6 @@ import android.os.Build;
 import android.util.Log;
 
 import com.nostra13.universalimageloader.cache.memory.impl.LRULimitedMemoryCache;
-import com.nostra13.universalimageloader.cache.memory.impl.LruMemoryCache;
-import com.nostra13.universalimageloader.cache.memory.impl.WeakMemoryCache;
 import com.nostra13.universalimageloader.core.ImageLoader;
 import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
 
@@ -83,7 +81,7 @@ public class App extends Application {
         initNotificationChannel();
 
         // Initialize image loader
-        ImageLoader.getInstance().init(getImageLoaderConfigurations(10));
+        ImageLoader.getInstance().init(getImageLoaderConfigurations(10, 50));
 
         configureRxJavaErrorHandler();
     }
@@ -121,9 +119,11 @@ public class App extends Application {
         });
     }
 
-    private ImageLoaderConfiguration getImageLoaderConfigurations(final int memoryCacheSizeMb) {
+    private ImageLoaderConfiguration getImageLoaderConfigurations(final int memoryCacheSizeMb,
+                                                                  final int diskCacheSizeMb) {
         return new ImageLoaderConfiguration.Builder(this)
                 .memoryCache(new LRULimitedMemoryCache(memoryCacheSizeMb * 1024 * 1024))
+                .diskCacheSize(diskCacheSizeMb * 1024 * 1024)
                 .build();
     }
 

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

@@ -35,6 +35,7 @@ import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.OnClickGesture;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -289,6 +290,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     @Override
     public void handleResult(@NonNull List<PlaylistStreamEntry> result) {
         super.handleResult(result);
+        if (itemListAdapter == null) return;
+
         itemListAdapter.clearStreamItemList();
 
         if (result.isEmpty()) {
@@ -349,7 +352,7 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
                 .setView(dialogView)
                 .setCancelable(true)
                 .setNegativeButton(R.string.cancel, null)
-                .setPositiveButton(R.string.create, (dialogInterface, i) ->
+                .setPositiveButton(R.string.rename, (dialogInterface, i) ->
                         changePlaylistName(nameEdit.getText().toString())
                 );
 
@@ -382,6 +385,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     }
 
     private void deleteItem(final PlaylistStreamEntry item) {
+        if (itemListAdapter == null) return;
+
         itemListAdapter.removeItem(item);
         setVideoCount(itemListAdapter.getItemsList().size());
         saveChanges();
@@ -543,6 +548,10 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     }
 
     private PlayQueue getPlayQueue(final int index) {
+        if (itemListAdapter == null) {
+            return new SinglePlayQueue(Collections.emptyList(), 0);
+        }
+
         final List<LocalItem> infoItems = itemListAdapter.getItemsList();
         List<StreamInfoItem> streamInfoItems = new ArrayList<>(infoItems.size());
         for (final LocalItem item : infoItems) {

app/src/main/java/org/schabi/newpipe/fragments/local/bookmark/StatisticsPlaylistFragment.java

@@ -27,6 +27,7 @@ import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.OnClickGesture;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import icepick.State;
@@ -185,6 +186,8 @@ public abstract class StatisticsPlaylistFragment
     @Override
     public void handleResult(@NonNull List<StreamStatisticsEntry> result) {
         super.handleResult(result);
+        if (itemListAdapter == null) return;
+
         itemListAdapter.clearStreamItemList();
 
         if (result.isEmpty()) {
@@ -275,6 +278,10 @@ public abstract class StatisticsPlaylistFragment
     }
 
     private PlayQueue getPlayQueue(final int index) {
+        if (itemListAdapter == null) {
+            return new SinglePlayQueue(Collections.emptyList(), 0);
+        }
+
         final List<LocalItem> infoItems = itemListAdapter.getItemsList();
         List<StreamInfoItem> streamInfoItems = new ArrayList<>(infoItems.size());
         for (final LocalItem item : infoItems) {

app/src/main/res/values/strings.xml

@@ -233,6 +233,7 @@
     <string name="delete_all">Delete All</string>
     <string name="checksum">Checksum</string>
     <string name="dismiss">Dismiss</string>
+    <string name="rename">Rename</string>
 
     <!-- Fragment -->
     <string name="add">New mission</string>