Improve picture in picture transition

Author: samfundev

app/src/main/java/com/perflyst/twire/activities/stream/StreamActivity.java

@@ -200,6 +200,10 @@ public void onBackPressed() {
     public void onUserLeaveHint() {
         super.onUserLeaveHint();
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            return;
+        }
+
         if (getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_PICTURE_IN_PICTURE)) {
             mStreamFragment.prePictureInPicture();
             enterPictureInPictureMode();

app/src/main/java/com/perflyst/twire/fragments/StreamFragment.java

@@ -2,6 +2,7 @@
 
 import android.app.Activity;
 import android.app.PendingIntent;
+import android.app.PictureInPictureParams;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.Context;
@@ -22,6 +23,7 @@
 import android.transition.Transition;
 import android.util.DisplayMetrics;
 import android.util.Log;
+import android.util.Rational;
 import android.view.Display;
 import android.view.DisplayCutout;
 import android.view.LayoutInflater;
@@ -652,6 +654,28 @@ public void onPlayWhenReadyChanged(boolean isPlaying, int _ignored) {
         }
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.O)
+    @Override
+    public void onSurfaceSizeChanged(int width, int height) {
+        Rect videoRect = new Rect();
+        mVideoView.getVideoSurfaceView().getGlobalVisibleRect(videoRect);
+
+        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            videoRect.left += totalVerticalInset;
+            videoRect.right += totalVerticalInset;
+        }
+
+        PictureInPictureParams.Builder builder = new PictureInPictureParams.Builder()
+                .setAspectRatio(new Rational(16, 9))
+                .setSourceRectHint(videoRect);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            builder.setAutoEnterEnabled(true);
+        }
+
+        mActivity.setPictureInPictureParams(builder.build());
+    }
+
     /**
      * Hides the preview image and updates the state
      */