android studio播放器代码

以下是一个简单的 Android Studio 播放器代码示例：

public class MainActivity extends AppCompatActivity implements MediaPlayer.OnPreparedListener {

    private MediaPlayer mediaPlayer;
    private SurfaceView surfaceView;
    private SurfaceHolder surfaceHolder;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        surfaceView = findViewById(R.id.surfaceView);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                mediaPlayer = new MediaPlayer();
                mediaPlayer.setDisplay(holder);
                mediaPlayer.setOnPreparedListener(MainActivity.this);
                try {
                    mediaPlayer.setDataSource("your_mp4_video_url");
                    mediaPlayer.prepareAsync();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {
                if (mediaPlayer != null) {
                    mediaPlayer.release();
                    mediaPlayer = null;
                }
            }
        });
    }

    @Override
    public void onPrepared(MediaPlayer mp) {
        mediaPlayer.start();
    }
}

其中，`surfaceView` 用于展示视频画面，`surfaceHolder` 用于控制 `surfaceView`。在 `surfaceHolder` 的回调函数 `surfaceCreated()` 中，创建 `MediaPlayer` 对象，设置 `SurfaceHolder` 和数据源，调用 `prepareAsync()` 进行异步准备，等待 `onPrepared()` 回调，开始播放视频。在 `surfaceHolder` 的回调函数 `surfaceDestroyed()` 中，释放 `MediaPlayer` 对象。