//播放器實例化
mediaPlayer = new MediaPlayer();
//準備播放素材
Uri uri = Uri.fromFile(new File("sdcard/DCIM","Camera/test.mp4"));
try {
    //播放器載入資源
    mediaPlayer.setDataSource(this,uri);
} catch (IOException e) {
    e.printStackTrace();
}
//播放器異步準備
mediaPlayer.prepareAsync();
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
    @Override
    public void onPrepared(MediaPlayer mp) {
        //播放操作
        mediaPlayer.start();
    }
});
//播放窗口展示
SurfaceView surfaceView = new SurfaceView(this);
surfaceView.post(new Runnable() {
    @Override
    public void run() {
        mediaPlayer.setSurface(surfaceView.getHolder().getSurface());
    }
});

private static final int IDLE = 0; // 空閑狀態(tài)
private static final int INIT = 3;// 初始化狀態(tài)
private static final int PREPARING = 4;// 準備狀態(tài)
private static final int PREPARED = 5;// 準備狀態(tài)
private static final int STARTED = 6;// 開始狀態(tài)
private static final int PAUSED = 7;// 暫停狀態(tài)
private static final int STOPPED = 8;// 停止狀態(tài)

private static final int END = 9; // 結束狀態(tài)
private static final int ERROR = 10;// 錯誤狀態(tài)

@IntDef({IDLE,
        END,
        ERROR,
        INIT,
        PREPARED,
        STARTED,
        PAUSED,
        STOPPED,
})
public @interface STATUS {
}

MediaPlayer mMediaPlayer;
Context mContext;
@STATUS
int mPlayerStatus = IDLE;

public AndroidMediaPlayer(Context context) {
    mContext = context;
    mMediaPlayer = new MediaPlayer();
    mMediaPlayer.setOnErrorListener(this);
    mMediaPlayer.setOnCompletionListener(this);
    mMediaPlayer.setOnPreparedListener(this);
    mPlayerStatus = INIT;
}

//資源入?yún)?
public void setSource(Uri uri){
    try {
        mMediaPlayer.setDataSource(mContext,uri);
        mMediaPlayer.prepareAsync();
        mPlayerStatus = PREPARING;
    } catch (IOException e) {
        e.printStackTrace();
    }
}
// 設置可視化窗口
public void setSurface(Surface surface){
    mMediaPlayer.setSurface(surface);
}
//開始播放
public void start(){
    mMediaPlayer.start();
    mPlayerStatus = STARTED;
}
//暫停
public void pause(){
    if(mPlayerStatus > PAUSED) return;
    mMediaPlayer.pause();
    mPlayerStatus = PAUSED;
}
//停止
public void stop(){
    if(mPlayerStatus > STOPPED) return;
    mMediaPlayer.stop();
    mPlayerStatus = STOPPED;
}
//釋放
public void release(){
    if(mPlayerStatus >= INIT){
        mMediaPlayer.release();
        mMediaPlayer = null;
        mPlayerStatus = END;
    }
}
// 錯誤回調(diào)
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
    mPlayerStatus = ERROR;
    return false;
}
// 播放回調(diào)
@Override
public void onCompletion(MediaPlayer mp) {

}
// 準備成功回調(diào)
@Override
public void onPrepared(MediaPlayer mp) {
    mPlayerStatus = PREPARED;
}