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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package com.android.settings.fingerprint;
     18 
     19 import android.content.ContentResolver;
     20 import android.content.Context;
     21 import android.content.res.Resources;
     22 import android.graphics.SurfaceTexture;
     23 import android.media.MediaPlayer;
     24 import android.media.MediaPlayer.OnInfoListener;
     25 import android.media.MediaPlayer.OnPreparedListener;
     26 import android.net.Uri;
     27 import android.support.annotation.VisibleForTesting;
     28 import android.util.AttributeSet;
     29 import android.view.Surface;
     30 import android.view.TextureView;
     31 import android.view.View;
     32 
     33 import com.android.settings.R;
     34 
     35 /**
     36  * A view containing a VideoView for showing the user how to enroll a fingerprint
     37  */
     38 public class FingerprintLocationAnimationVideoView extends TextureView
     39         implements FingerprintFindSensorAnimation {
     40     protected float mAspect = 1.0f; // initial guess until we know
     41     protected MediaPlayer mMediaPlayer;
     42 
     43     public FingerprintLocationAnimationVideoView(Context context, AttributeSet attrs) {
     44         super(context, attrs);
     45     }
     46 
     47     @Override
     48     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
     49         // Width is driven by measurespec, height is derrived from aspect ratio
     50         int originalWidth = MeasureSpec.getSize(widthMeasureSpec);
     51         int height = Math.round(mAspect * originalWidth);
     52         super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
     53     }
     54 
     55     protected Uri getFingerprintLocationAnimation() {
     56         return resourceEntryToUri(getContext(), R.raw.fingerprint_location_animation);
     57     }
     58 
     59     @Override
     60     protected void onFinishInflate() {
     61         super.onFinishInflate();
     62         setSurfaceTextureListener(new SurfaceTextureListener() {
     63             private SurfaceTexture mTextureToDestroy = null;
     64 
     65             @Override
     66             public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width,
     67                     int height) {
     68                 setVisibility(View.INVISIBLE);
     69                 Uri videoUri = getFingerprintLocationAnimation();
     70                 if (mMediaPlayer != null) {
     71                     mMediaPlayer.release();
     72                 }
     73                 if (mTextureToDestroy != null) {
     74                     mTextureToDestroy.release();
     75                     mTextureToDestroy = null;
     76                 }
     77                 mMediaPlayer = createMediaPlayer(mContext, videoUri);
     78                 if (mMediaPlayer == null) {
     79                     // MediaPlayer.create() method can return null
     80                     return;
     81                 }
     82                 mMediaPlayer.setSurface(new Surface(surfaceTexture));
     83                 mMediaPlayer.setOnPreparedListener(new OnPreparedListener() {
     84                     @Override
     85                     public void onPrepared(MediaPlayer mediaPlayer) {
     86                         mediaPlayer.setLooping(true);
     87                     }
     88                 });
     89                 mMediaPlayer.setOnInfoListener(new OnInfoListener() {
     90                     @Override
     91                     public boolean onInfo(MediaPlayer mediaPlayer, int what, int extra) {
     92                         if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START) {
     93                             // Keep the view hidden until video starts
     94                             setVisibility(View.VISIBLE);
     95                         }
     96                         return false;
     97                     }
     98                 });
     99                 mAspect = (float) mMediaPlayer.getVideoHeight() / mMediaPlayer.getVideoWidth();
    100                 requestLayout();
    101                 startAnimation();
    102             }
    103 
    104             @Override
    105             public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture,
    106                     int width, int height) {
    107             }
    108 
    109             @Override
    110             public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
    111                 mTextureToDestroy = surfaceTexture;
    112                 return false;
    113             }
    114 
    115             @Override
    116             public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
    117             }
    118         });
    119     }
    120 
    121     @VisibleForTesting
    122     MediaPlayer createMediaPlayer(Context context, Uri videoUri) {
    123         return MediaPlayer.create(mContext, videoUri);
    124     }
    125 
    126     protected static Uri resourceEntryToUri (Context context, int id) {
    127         Resources res = context.getResources();
    128         return Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" +
    129                 res.getResourcePackageName(id) + '/' +
    130                 res.getResourceTypeName(id) + '/' +
    131                 res.getResourceEntryName(id));
    132     }
    133 
    134     @Override
    135     public void startAnimation() {
    136         if (mMediaPlayer != null && !mMediaPlayer.isPlaying()) {
    137             mMediaPlayer.start();
    138         }
    139     }
    140 
    141     @Override
    142     public void stopAnimation() {
    143         if (mMediaPlayer != null) {
    144             mMediaPlayer.stop();
    145             mMediaPlayer.release();
    146             mMediaPlayer = null;
    147         }
    148     }
    149 
    150     @Override
    151     public void pauseAnimation() {
    152         if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
    153             mMediaPlayer.pause();
    154         }
    155     }
    156 
    157 }
    158