DO NOT MERGE - Merge pi-dev@5234907 into stage-aosp-master

Bug: 120848293
Change-Id: Iacf20e314aed7ad8dd63517c2c920077530527dc

library/main/src/com/android/setupwizardlib/view/IllustrationVideoView.java

@@ -65,6 +65,8 @@ public class IllustrationVideoView extends TextureView implements Animatable,
 
     @VisibleForTesting Surface mSurface;
 
+    protected int mWindowVisibility;
+
     public IllustrationVideoView(Context context, AttributeSet attrs) {
         super(context, attrs);
         final TypedArray a = context.obtainStyledAttributes(attrs,
@@ -125,7 +127,7 @@ public class IllustrationVideoView extends TextureView implements Animatable,
      * Creates a media player for the current URI. The media player will be started immediately if
      * the view's window is visible. If there is an existing media player, it will be released.
      */
-    private void createMediaPlayer() {
+    protected void createMediaPlayer() {
         if (mMediaPlayer != null) {
             mMediaPlayer.release();
         }
@@ -150,11 +152,35 @@ public class IllustrationVideoView extends TextureView implements Animatable,
         } else {
             Log.wtf(TAG, "Unable to initialize media player for video view");
         }
-        if (getWindowVisibility() == View.VISIBLE) {
+        if (mWindowVisibility == View.VISIBLE) {
             start();
         }
     }
 
+    protected void createSurface() {
+        if (mSurface != null) {
+            mSurface.release();
+            mSurface = null;
+        }
+        // Reattach only if it has been previously released
+        SurfaceTexture surfaceTexture = getSurfaceTexture();
+        if (surfaceTexture != null) {
+            setVisibility(View.INVISIBLE);
+            mSurface = new Surface(surfaceTexture);
+        }
+    }
+
+    @Override
+    protected void onWindowVisibilityChanged(int visibility) {
+        super.onWindowVisibilityChanged(visibility);
+        mWindowVisibility = visibility;
+        if (visibility == View.VISIBLE) {
+            reattach();
+        } else {
+            release();
+        }
+    }
+
     /**
      * Whether the media player should play the video in a continuous loop. The default value is
      * true.
@@ -179,14 +205,34 @@ public class IllustrationVideoView extends TextureView implements Animatable,
         }
     }
 
+    private void reattach() {
+        if (mSurface == null) {
+            initVideo();
+        }
+    }
+
+    private void initVideo() {
+        if (mWindowVisibility != View.VISIBLE) {
+            return;
+        }
+        createSurface();
+        if (mSurface != null) {
+            createMediaPlayer();
+        } else {
+            Log.w("IllustrationVideoView", "Surface creation failed");
+        }
+    }
+
+    protected void onRenderingStart() {
+    }
+
     /* SurfaceTextureListener methods */
 
     @Override
     public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
         // Keep the view hidden until video starts
         setVisibility(View.INVISIBLE);
-        mSurface = new Surface(surfaceTexture);
-        createMediaPlayer();
+        initVideo();
     }
 
     @Override
@@ -231,6 +277,7 @@ public class IllustrationVideoView extends TextureView implements Animatable,
         if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START) {
             // Video available, show view now
             setVisibility(View.VISIBLE);
+            onRenderingStart();
         }
         return false;
     }

library/test/robotest/src/com/android/setupwizardlib/view/IllustrationVideoViewTest.java

@@ -16,6 +16,8 @@
 
 package com.android.setupwizardlib.view;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
@@ -30,6 +32,7 @@ import android.graphics.SurfaceTexture;
 import android.media.MediaPlayer;
 import android.os.Build.VERSION_CODES;
 import android.view.Surface;
+import android.view.View;
 
 import androidx.annotation.RawRes;
 
@@ -91,6 +94,30 @@ public class IllustrationVideoViewTest {
         }
     }
 
+    @Test
+    public void onVisibilityChanged_notVisible_shouldRelease() {
+        createDefaultView();
+        mView.onWindowVisibilityChanged(View.GONE);
+
+        verify(ShadowMockMediaPlayer.sMediaPlayer).release();
+        assertThat(mView.mSurface).isNull();
+        assertThat(mView.mMediaPlayer).isNull();
+    }
+
+    @Test
+    public void onVisibilityChanged_visible_shouldPlay() {
+        createDefaultView();
+
+        mView.onWindowVisibilityChanged(View.GONE);
+        assertThat(mView.mSurface).isNull();
+        assertThat(mView.mMediaPlayer).isNull();
+
+        mView.onWindowVisibilityChanged(View.VISIBLE);
+
+        assertThat(mView.mSurface).isNotNull();
+        assertThat(mView.mMediaPlayer).isNotNull();
+    }
+
     @Test
     public void testPausedWhenWindowFocusLost() {
         createDefaultView();
@@ -149,6 +176,7 @@ public class IllustrationVideoViewTest {
                         // Any resource attribute should work, since the media player is mocked
                         .addAttribute(R.attr.suwVideo, "@android:color/white")
                         .build());
+        mView.setSurfaceTexture(mock(SurfaceTexture.class));
         mView.onSurfaceTextureAvailable(mSurfaceTexture, 500, 500);
     }