src/com/android/settings/gestures/GesturePreference.java

   1 /*
   2  * Copyright (C) 2016 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
   5  * except in compliance with the License. You may obtain a copy of the License at
   6  *
   7  *      http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software distributed under the
  10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  11  * KIND, either express or implied. See the License for the specific language governing
  12  * permissions and limitations under the License.
  13  */
  14
  15 package com.android.settings.gestures;
  16
  17 import android.content.Context;
  18 import android.content.res.TypedArray;
  19 import android.graphics.Bitmap;
  20 import android.graphics.drawable.BitmapDrawable;
  21 import android.graphics.SurfaceTexture;
  22 import android.media.MediaMetadataRetriever;
  23 import android.media.MediaPlayer;
  24 import android.net.Uri;
  25 import android.support.v14.preference.SwitchPreference;
  26 import android.support.v7.preference.PreferenceViewHolder;
  27 import android.view.MotionEvent;
  28 import android.view.View;
  29 import android.view.Surface;
  30 import android.view.TextureView;
  31 import android.widget.ImageView;
  32 import android.util.AttributeSet;
  33 import android.util.Log;
  34
  35 import com.android.settings.R;
  36
  37 /**
  38  * Preference item for a gesture with a switch to signify if it should be enabled.
  39  * This shows the title and description of the gesture along with an animation showing how to do
  40  * the gesture
  41  */
  42 public class GesturePreference extends SwitchPreference {
  43     private static final String TAG = "GesturePreference";
  44     private Uri mVideoPath;
  45     private Context mContext;
  46     private MediaPlayer mMediaPlayer;
  47     private MediaMetadataRetriever mMediaMetadata;
  48
  49     public GesturePreference(Context context, AttributeSet attrs) {
  50         super(context, attrs);
  51         mContext = context;
  52         setLayoutResource(R.layout.gesture_preference);
  53         TypedArray attributes = context.getTheme().obtainStyledAttributes(
  54                 attrs,
  55                 R.styleable.GesturePreference,
  56                 0, 0);
  57         try {
  58             int animation = attributes.getResourceId(R.styleable.GesturePreference_animation, 0);
  59             mVideoPath = Uri.parse(
  60                 "android.resource://" + context.getPackageName() + "/" + animation);
  61             mMediaMetadata = new MediaMetadataRetriever();
  62             mMediaMetadata.setDataSource(mContext, mVideoPath);
  63         } catch (Exception e) {
  64             // resource not available, show blank view
  65         } finally {
  66             attributes.recycle();
  67         }
  68     }
  69
  70     @Override
  71     public void onBindViewHolder(PreferenceViewHolder holder) {
  72         super.onBindViewHolder(holder);
  73         final TextureView video = (TextureView) holder.findViewById(R.id.gesture_video);
  74         final ImageView imageView = (ImageView) holder.findViewById(R.id.gesture_image);
  75
  76         video.setOnTouchListener(new View.OnTouchListener() {
  77             @Override
  78             public boolean onTouch(View v, MotionEvent event) {
  79                 if (event.getAction() == MotionEvent.ACTION_DOWN) {
  80                     if (mMediaPlayer != null) {
  81                         if (mMediaPlayer.isPlaying()) {
  82                             mMediaPlayer.pause();
  83                         } else {
  84                             mMediaPlayer.start();
  85                             imageView.setVisibility(View.GONE);
  86                         }
  87                     }
  88                     return true;
  89                 }
  90                 return false;
  91             }
  92         });
  93
  94         video.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
  95             @Override
  96             public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
  97                 mMediaPlayer = MediaPlayer.create(mContext, mVideoPath);
  98                 if (mMediaPlayer != null) {
  99                     mMediaPlayer.setSurface(new Surface(surfaceTexture));
 100                     mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
 101                         @Override
 102                         public void onPrepared(MediaPlayer mediaPlayer) {
 103                             mediaPlayer.setLooping(true);
 104                         }
 105                     });
 106                 }
 107             }
 108
 109             @Override
 110             public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {
 111             }
 112
 113             @Override
 114             public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
 115                 imageView.setVisibility(View.VISIBLE);
 116                 if (mMediaPlayer != null) {
 117                     mMediaPlayer.stop();
 118                     mMediaPlayer.reset();
 119                     mMediaPlayer.release();
 120                 }
 121                 return false;
 122             }
 123
 124             @Override
 125             public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
 126             }
 127         });
 128
 129         if (mMediaPlayer == null) {
 130             Bitmap bitmap = mMediaMetadata.getFrameAtTime(0);
 131             if (bitmap != null) {
 132                 imageView.setImageDrawable(new BitmapDrawable(bitmap));
 133             }
 134             imageView.setVisibility(View.VISIBLE);
 135         }
 136
 137     }
 138
 139 }