Merge pull request #2444 from moneytoo/rotate

Handle (auto)rotation changes during activity lifecycle

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

@@ -24,11 +24,13 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
 import android.content.res.Configuration;
+import android.database.ContentObserver;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
 import android.media.AudioManager;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Handler;
 import android.preference.PreferenceManager;
 import android.provider.Settings;
 import android.support.annotation.ColorInt;
@@ -113,6 +115,8 @@ public final class MainVideoPlayer extends AppCompatActivity
     private boolean isInMultiWindow;
     private boolean isBackPressed;
 
+    private ContentObserver rotationObserver;
+
     /*//////////////////////////////////////////////////////////////////////////
     // Activity LifeCycle
     //////////////////////////////////////////////////////////////////////////*/
@@ -147,6 +151,23 @@ public final class MainVideoPlayer extends AppCompatActivity
             Toast.makeText(this, R.string.general_error, Toast.LENGTH_SHORT).show();
             finish();
         }
+
+        rotationObserver = new ContentObserver(new Handler()) {
+            @Override
+            public void onChange(boolean selfChange) {
+                super.onChange(selfChange);
+                if (globalScreenOrientationLocked()) {
+                    final boolean lastOrientationWasLandscape = defaultPreferences.getBoolean(
+                            getString(R.string.last_orientation_landscape_key), false);
+                    setLandscape(lastOrientationWasLandscape);
+                } else {
+                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
+                }
+            }
+        };
+        getContentResolver().registerContentObserver(
+                Settings.System.getUriFor(Settings.System.ACCELEROMETER_ROTATION),
+                false, rotationObserver);
     }
 
     @Override
@@ -239,6 +260,9 @@ public final class MainVideoPlayer extends AppCompatActivity
         playerState = createPlayerState();
         playerImpl.destroy();
 
+        if (rotationObserver != null)
+            getContentResolver().unregisterContentObserver(rotationObserver);
+
         isInMultiWindow = false;
         isBackPressed = false;
     }