Add AnimatedVectorDrawable support for VideoPreference

- We are planning to use animation vector drawable to replace mp4
file to reduce apk size
- Add vectorAnimation attr in VideoPreference
- Delegate VideoPreference media control to AnimationController

Bug: 143270527
Test: manual, robolectric
Change-Id: Ia5859f928a9082085cdf715c762f964e1c99e003

src/com/android/settings/widget/MediaAnimationController.java

@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.widget;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.graphics.SurfaceTexture;
+import android.media.MediaPlayer;
+import android.net.Uri;
+import android.view.Surface;
+import android.view.TextureView;
+import android.view.View;
+
+/**
+ * A {@link VideoPreference.AnimationController} containing a {@link
+ * MediaPlayer}. The controller is used by {@link VideoPreference} to display
+ * a mp4 resource.
+ */
+class MediaAnimationController implements VideoPreference.AnimationController {
+    private MediaPlayer mMediaPlayer;
+    private boolean mVideoReady;
+
+    MediaAnimationController(Context context, int videoId) {
+        final Uri videoPath = new Uri.Builder().scheme(ContentResolver.SCHEME_ANDROID_RESOURCE)
+                .authority(context.getPackageName())
+                .appendPath(String.valueOf(videoId))
+                .build();
+        mMediaPlayer = MediaPlayer.create(context, videoPath);
+        // when the playback res is invalid or others, MediaPlayer create may fail
+        // and return null, so need add the null judgement.
+        if (mMediaPlayer != null) {
+            mMediaPlayer.seekTo(0);
+            mMediaPlayer.setOnSeekCompleteListener(mp -> mVideoReady = true);
+            mMediaPlayer.setOnPreparedListener(mediaPlayer -> mediaPlayer.setLooping(true));
+        }
+    }
+
+    @Override
+    public int getVideoWidth() {
+        return mMediaPlayer.getVideoWidth();
+    }
+
+    @Override
+    public int getVideoHeight() {
+        return mMediaPlayer.getVideoHeight();
+    }
+
+    @Override
+    public void pause() {
+        mMediaPlayer.pause();
+    }
+
+    @Override
+    public void start() {
+        mMediaPlayer.start();
+    }
+
+    @Override
+    public boolean isPlaying() {
+        return mMediaPlayer.isPlaying();
+    }
+
+    @Override
+    public int getDuration() {
+        return mMediaPlayer.getDuration();
+    }
+
+    @Override
+    public void attachView(TextureView video, View preview, View playButton) {
+        updateViewStates(preview, playButton);
+        video.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
+            @Override
+            public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width,
+                    int height) {
+                if (mMediaPlayer != null) {
+                    final Surface surface = new Surface(surfaceTexture);
+                    mMediaPlayer.setSurface(surface);
+                }
+            }
+
+            @Override
+            public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width,
+                    int height) {
+            }
+
+            @Override
+            public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
+                preview.setVisibility(View.VISIBLE);
+                return false;
+            }
+
+            @Override
+            public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
+                if (mVideoReady) {
+                    if (preview.getVisibility() == View.VISIBLE) {
+                        preview.setVisibility(View.GONE);
+                    }
+                    if (mMediaPlayer != null
+                            && !mMediaPlayer.isPlaying()) {
+                        mMediaPlayer.start();
+                        playButton.setVisibility(View.GONE);
+                    }
+                }
+                if (mMediaPlayer != null && !mMediaPlayer.isPlaying()
+                        && playButton.getVisibility() != View.VISIBLE) {
+                    playButton.setVisibility(View.VISIBLE);
+                }
+            }
+        });
+        video.setOnClickListener(v -> updateViewStates(preview, playButton));
+    }
+
+    @Override
+    public void release() {
+        if (mMediaPlayer != null) {
+            mMediaPlayer.stop();
+            mMediaPlayer.reset();
+            mMediaPlayer.release();
+            mMediaPlayer = null;
+            mVideoReady = false;
+        }
+    }
+
+    private void updateViewStates(View imageView, View playButton) {
+        if (mMediaPlayer.isPlaying()) {
+            mMediaPlayer.pause();
+            playButton.setVisibility(View.VISIBLE);
+            imageView.setVisibility(View.VISIBLE);
+        } else {
+            imageView.setVisibility(View.GONE);
+            playButton.setVisibility(View.GONE);
+            mMediaPlayer.start();
+        }
+    }
+}