Minor improvements

- Use early return in case of nulls
- Use better variable names
- Remove non-required newlines, imports and add missing ones

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/org/schabi/newpipe/ExitActivity.kt

@@ -10,13 +10,12 @@ import android.app.Activity
 import android.content.Intent
 import android.os.Bundle
 import org.schabi.newpipe.util.NavigationHelper
+
 class ExitActivity : Activity() {
     @SuppressLint("NewApi")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-
         finishAndRemoveTask()
-
         NavigationHelper.restartApp(this)
     }
 
@@ -24,7 +23,6 @@ class ExitActivity : Activity() {
         @JvmStatic
         fun exitAndRemoveFromRecentApps(activity: Activity) {
             val intent = Intent(activity, ExitActivity::class.java)
-
             intent.addFlags(
                 Intent.FLAG_ACTIVITY_NEW_TASK
                     or Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS

app/src/main/java/org/schabi/newpipe/util/NewPipeTextViewHelper.kt

@@ -54,7 +54,7 @@ object NewPipeTextViewHelper {
         selectedText: CharSequence?
     ) {
         if (!selectedText.isNullOrEmpty()) {
-            ShareUtils.shareText(textView.getContext(), "", selectedText.toString())
+            ShareUtils.shareText(textView.context, "", selectedText.toString())
         }
     }
 }

app/src/main/java/org/schabi/newpipe/util/PeertubeHelper.kt

@@ -16,14 +16,17 @@ import org.schabi.newpipe.extractor.ServiceList
 import org.schabi.newpipe.extractor.services.peertube.PeertubeInstance
 
 object PeertubeHelper {
+
+    @JvmStatic
+    val currentInstance: PeertubeInstance
+        get() = ServiceList.PeerTube.instance
+
     @JvmStatic
     fun getInstanceList(context: Context): List<PeertubeInstance> {
         val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
         val savedInstanceListKey = context.getString(R.string.peertube_instance_list_key)
         val savedJson = sharedPreferences.getString(savedInstanceListKey, null)
-        if (savedJson == null) {
-            return listOf(currentInstance)
-        }
+            ?: return listOf(currentInstance)
 
         return runCatching {
             JsonParser.`object`().from(savedJson).getArray("instances")
@@ -46,8 +49,4 @@ object PeertubeHelper {
         ServiceList.PeerTube.instance = instance
         return instance
     }
-
-    @JvmStatic
-    val currentInstance: PeertubeInstance
-        get() = ServiceList.PeerTube.instance
 }

app/src/main/java/org/schabi/newpipe/util/ServiceHelper.kt

@@ -10,15 +10,12 @@ import androidx.annotation.DrawableRes
 import androidx.annotation.StringRes
 import androidx.core.content.edit
 import androidx.preference.PreferenceManager
-import com.grack.nanojson.JsonObject
 import com.grack.nanojson.JsonParser
-import com.grack.nanojson.JsonParserException
 import java.util.concurrent.TimeUnit
 import org.schabi.newpipe.R
 import org.schabi.newpipe.extractor.NewPipe
 import org.schabi.newpipe.extractor.ServiceList
 import org.schabi.newpipe.extractor.StreamingService
-import org.schabi.newpipe.extractor.exceptions.ExtractionException
 import org.schabi.newpipe.extractor.services.peertube.PeertubeInstance
 import org.schabi.newpipe.ktx.getStringSafe
 
@@ -133,8 +130,8 @@ object ServiceHelper {
     }
 
     private fun setSelectedServicePreferences(context: Context, serviceName: String?) {
-        val sp = PreferenceManager.getDefaultSharedPreferences(context)
-        sp.edit { putString(context.getString(R.string.current_service_key), serviceName) }
+        val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
+        sharedPreferences.edit { putString(context.getString(R.string.current_service_key), serviceName) }
     }
 
     @JvmStatic
@@ -152,17 +149,15 @@ object ServiceHelper {
             val json = sharedPreferences.getString(
                 context.getString(R.string.peertube_selected_instance_key),
                 null
-            )
-            if (null == json) {
-                return
-            }
+            ) ?: return
 
             val jsonObject = runCatching { JsonParser.`object`().from(json) }
                 .getOrElse { return@initService }
 
-            val name = jsonObject.getString("name")
-            val url = jsonObject.getString("url")
-            ServiceList.PeerTube.instance = PeertubeInstance(url, name)
+            ServiceList.PeerTube.instance = PeertubeInstance(
+                jsonObject.getString("url"),
+                jsonObject.getString("name")
+            )
         }
     }