项目的功能很简单,单纯的播放视频,没有进度条,暂停键等,只有一个关闭按钮,当播放视频时切换到后台暂停播放,恢复到前台后接着原来的进度播放。
1.用MediaPlayer播放视频,调用MediaPlayer.start(),surfaceHolder还没初始化好,debug时指示错误的地方在
MediaPlayer.setDisplay(surfaceHolder)。
解决方法是把setDisplay()和start()放在surfaceCreated(SurfaceHolder holder)中,注意一定要setDisplay在start之前。
2.程序切换到后台再恢复播放,有声音没画面。
原因方式是当Activity进入onPause状态之后,SurfaceView会被销毁,进而回调surfaceDestroyed()方法,当程序从后台恢复到前台是,SurfaceView并没有重新创建,所以就出现只有声音没有画面的情况。
针对以上两种情况,完整的视频播放代码如下所示:
public class VideoPlayActivity extends BaseActivity implements SurfaceHolder.Callback {
private MediaPlayer mMediaPlayer = null;
private SurfaceHolder mSurfaceHolder;
@BindView(R.id.video_play)
SurfaceView mVideoPlay;
@BindView(R.id.video_close)
ImageView mVideoClose;
private String videoPath = "";
private int currentPosition = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_play);
ButterKnife.bind(this);
Intent intent = getIntent();
videoPath = intent.getStringExtra("videoPath");
mSurfaceHolder = mVideoPlay.getHolder();
mSurfaceHolder.addCallback(this);
mMediaPlayer = new MediaPlayer();
}
@OnClick(R.id.video_close)
public void onViewClicked() {
if(mMediaPlayer != null){
finish();
mMediaPlayer.reset();
mMediaPlayer.release();
mMediaPlayer = null;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if(mMediaPlayer != null){
finish();
mMediaPlayer.reset();
mMediaPlayer.release();
mMediaPlayer = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
mMediaPlayer.setDisplay(mSurfaceHolder); //设置显示视频显示在SurfaceView上
play(currentPosition);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if(mMediaPlayer != null && mMediaPlayer.isPlaying()){
currentPosition = mMediaPlayer.getCurrentPosition();
mMediaPlayer.stop();
}
}
private void play(int msec){
try {
mMediaPlayer.reset();
mMediaPlayer.setDataSource(videoPath);
mMediaPlayer.prepare();
mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mMediaPlayer.start();
mMediaPlayer.seekTo(msec);
}
});
} catch (IOException e) {
e.printStackTrace();
}
}
}