Exoplayer视频从一个活动切换到另一个活动，不会停止plaback

public class MainActivity extends AppCompatActivity {
    private SimpleExoPlayer player;

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

        // 初始化ExoPlayer实例
        player = ExoPlayerFactory.newSimpleInstance(this);

        // 设置播放器的媒体资源
        MediaSource mediaSource = buildMediaSource();
        player.prepare(mediaSource);

        // 开始播放
        player.setPlayWhenReady(true);
    }

    @Override
    protected void onPause() {
        super.onPause();

        // 停止播放并释放资源
        player.setPlayWhenReady(false);
        player.release();
    }

    // 构建媒体资源
    private MediaSource buildMediaSource() {
        // 构建媒体资源的代码
        // ...
    }
}