Initial commit for better handling of background crashes

Fix crashing behaviour with entry in SharedPreferences

A few minor improvements

Added docs for isInBackground

Some more minor changes

Overwrite methods in MainActivity instead of creating a new class

Author: Thompson3142

app/build.gradle

@@ -233,6 +233,7 @@ dependencies {
     implementation 'androidx.fragment:fragment-ktx:1.6.2'
     implementation "androidx.lifecycle:lifecycle-livedata-ktx:${androidxLifecycleVersion}"
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:${androidxLifecycleVersion}"
+    implementation "androidx.lifecycle:lifecycle-process:${androidxLifecycleVersion}"
     implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.1.0'
     implementation 'androidx.media:media:1.7.0'
     implementation 'androidx.preference:preference:1.2.1'

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

@@ -126,7 +126,10 @@ public class MainActivity extends AppCompatActivity {
     private static final int ITEM_ID_ABOUT = 2;
 
     private static final int ORDER = 0;
+    public static final String KEY_IS_IN_BACKGROUND = "is_in_background";
 
+    private SharedPreferences sharedPreferences;
+    private SharedPreferences.Editor sharedPrefEditor;
     /*//////////////////////////////////////////////////////////////////////////
     // Activity's LifeCycle
     //////////////////////////////////////////////////////////////////////////*/
@@ -156,6 +159,8 @@ protected void onCreate(final Bundle savedInstanceState) {
 
         assureCorrectAppLanguage(this);
         super.onCreate(savedInstanceState);
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        sharedPrefEditor = sharedPreferences.edit();
 
         mainBinding = ActivityMainBinding.inflate(getLayoutInflater());
         drawerLayoutBinding = mainBinding.drawerLayout;
@@ -199,16 +204,29 @@ protected void onPostCreate(final Bundle savedInstanceState) {
         super.onPostCreate(savedInstanceState);
 
         final App app = App.getApp();
-        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(app);
 
-        if (prefs.getBoolean(app.getString(R.string.update_app_key), false)
-                && prefs.getBoolean(app.getString(R.string.update_check_consent_key), false)) {
+        if (sharedPreferences.getBoolean(app.getString(R.string.update_app_key), false)
+                && sharedPreferences
+                .getBoolean(app.getString(R.string.update_check_consent_key), false)) {
             // Start the worker which is checking all conditions
             // and eventually searching for a new version.
             NewVersionWorker.enqueueNewVersionCheckingWork(app, false);
         }
     }
 
+    @Override
+    protected void onStart() {
+        super.onStart();
+        sharedPrefEditor.putBoolean(KEY_IS_IN_BACKGROUND, false).apply();
+        Log.d(TAG, "App moved to foreground");
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        sharedPrefEditor.putBoolean(KEY_IS_IN_BACKGROUND, true).apply();
+        Log.d(TAG, "App moved to background");
+    }
     private void setupDrawer() throws ExtractionException {
         addDrawerMenuForCurrentService();
 
@@ -508,21 +526,19 @@ protected void onResume() {
             ErrorUtil.showUiErrorSnackbar(this, "Setting up service toggle", e);
         }
 
-        final SharedPreferences sharedPreferences =
-                PreferenceManager.getDefaultSharedPreferences(this);
         if (sharedPreferences.getBoolean(Constants.KEY_THEME_CHANGE, false)) {
             if (DEBUG) {
                 Log.d(TAG, "Theme has changed, recreating activity...");
             }
-            sharedPreferences.edit().putBoolean(Constants.KEY_THEME_CHANGE, false).apply();
+            sharedPrefEditor.putBoolean(Constants.KEY_THEME_CHANGE, false).apply();
             ActivityCompat.recreate(this);
         }
 
         if (sharedPreferences.getBoolean(Constants.KEY_MAIN_PAGE_CHANGE, false)) {
             if (DEBUG) {
                 Log.d(TAG, "main page has changed, recreating main fragment...");
             }
-            sharedPreferences.edit().putBoolean(Constants.KEY_MAIN_PAGE_CHANGE, false).apply();
+            sharedPrefEditor.putBoolean(Constants.KEY_MAIN_PAGE_CHANGE, false).apply();
             NavigationHelper.openMainActivity(this);
         }
 

app/src/main/java/org/schabi/newpipe/error/ErrorUtil.kt

@@ -11,7 +11,9 @@ import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.core.app.PendingIntentCompat
 import androidx.fragment.app.Fragment
+import androidx.preference.PreferenceManager
 import com.google.android.material.snackbar.Snackbar
+import org.schabi.newpipe.MainActivity
 import org.schabi.newpipe.R
 
 /**
@@ -35,12 +37,20 @@ class ErrorUtil {
          * activity (since the workflow would be interrupted anyway in that case). So never use this
          * for background services.
          *
+         * If the crashed occurred while the app was in the background open a notification instead
+         *
          * @param context the context to use to start the new activity
          * @param errorInfo the error info to be reported
          */
         @JvmStatic
         fun openActivity(context: Context, errorInfo: ErrorInfo) {
-            context.startActivity(getErrorActivityIntent(context, errorInfo))
+            if (PreferenceManager.getDefaultSharedPreferences(context)
+                .getBoolean(MainActivity.KEY_IS_IN_BACKGROUND, true)
+            ) {
+                createNotification(context, errorInfo)
+            } else {
+                context.startActivity(getErrorActivityIntent(context, errorInfo))
+            }
         }
 
         /**