Question

问题在于，当我尝试更改播放器的方向时会有延迟。视频恢复前会有2到3秒的延迟。除了方向改变之外，其他任何事情都可以正常工作。

public class MainActivity extends AppCompatActivity {
    private final String STATE_RESUME_WINDOW = "resumeWindow";
    private final String STATE_RESUME_POSITION = "resumePosition";
    private final String STATE_PLAYER_FULLSCREEN = "playerFullscreen";
    private SimpleExoPlayerView mExoPlayerView;
    private MediaSource mVideoSource;
    private boolean mExoPlayerFullscreen = false;
    private FrameLayout mFullScreenButton;
    private ImageView mFullScreenIcon;
    private Dialog mFullScreenDialog;

    private int mResumeWindow;
    private long mResumePosition;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState != null) {
            mResumeWindow = savedInstanceState.getInt(STATE_RESUME_WINDOW);
            mResumePosition = savedInstanceState.getLong(STATE_RESUME_POSITION);
            mExoPlayerFullscreen = savedInstanceState.getBoolean(STATE_PLAYER_FULLSCREEN);
        }
     }

    @Override
    public void onSaveInstanceState(Bundle outState) {

        outState.putInt(STATE_RESUME_WINDOW, mResumeWindow);
        outState.putLong(STATE_RESUME_POSITION, mResumePosition);
        outState.putBoolean(STATE_PLAYER_FULLSCREEN, mExoPlayerFullscreen);
        super.onSaveInstanceState(outState);
     }

    private void initFullscreenDialog() {

        mFullScreenDialog = new Dialog(this, android.R.style.Theme_Black_NoTitleBar_Fullscreen) {
            public void onBackPressed() {
                if (mExoPlayerFullscreen)
                    closeFullscreenDialog();
                super.onBackPressed();
            }
        };
    }

    private void openFullscreenDialog() {

        ((ViewGroup) mExoPlayerView.getParent()).removeView(mExoPlayerView);
        mFullScreenDialog.addContentView(mExoPlayerView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT));
        mFullScreenIcon.setImageDrawable(ContextCompat.getDrawable(MainActivity.this,R.drawable.ic_fullscreen_shrink));
        mExoPlayerFullscreen = true;
        mFullScreenDialog.show();
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }

    private void closeFullscreenDialog() {

        ((ViewGroup) mExoPlayerView.getParent()).removeView(mExoPlayerView);
        ((FrameLayout) findViewById(R.id.main_media_frame)).addView(mExoPlayerView);
        mExoPlayerFullscreen = false;
        mFullScreenDialog.dismiss();
        mFullScreenIcon.setImageDrawable(ContextCompat.getDrawable(MainActivity.this,R.drawable.ic_fullscreen_expand));
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }

    private void initFullscreenButton() {

        PlaybackControlView controlView = mExoPlayerView.findViewById(R.id.exo_controller);
        mFullScreenIcon = controlView.findViewById(R.id.exo_fullscreen_icon);
        mFullScreenButton = controlView.findViewById(R.id.exo_fullscreen_button);
        mFullScreenButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!mExoPlayerFullscreen)
                    openFullscreenDialog();
                else
                    closeFullscreenDialog();
            }
        });
    }

    private void initExoPlayer() {

        BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
        TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter);
        TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
        LoadControl loadControl = new DefaultLoadControl();
        SimpleExoPlayer player = ExoPlayerFactory.newSimpleInstance(new DefaultRenderersFactory(this),trackSelector, loadControl);
        mExoPlayerView.setPlayer(player);

        boolean haveResumePosition = mResumeWindow != C.INDEX_UNSET;

        if (haveResumePosition) {
            mExoPlayerView.getPlayer().seekTo(mResumeWindow, mResumePosition);
        }

        mExoPlayerView.getPlayer().prepare(mVideoSource);
        mExoPlayerView.getPlayer().setPlayWhenReady(true);
    }

    @Override
    protected void onResume() {

        super.onResume();

        if (mExoPlayerView == null) {

            mExoPlayerView = (SimpleExoPlayerView) findViewById(R.id.exoplayer);
            initFullscreenDialog();
            initFullscreenButton();

            String streamUrl = "https://mnmedias.api.telequebec.tv/m3u8/29880.m3u8";
            String userAgent = Util.getUserAgent(MainActivity.this, getApplicationContext().getApplicationInfo().packageName);
            DefaultHttpDataSourceFactory httpDataSourceFactory = new DefaultHttpDataSourceFactory(userAgent, null,
            DefaultHttpDataSource.DEFAULT_CONNECT_TIMEOUT_MILLIS,
            DefaultHttpDataSource.DEFAULT_READ_TIMEOUT_MILLIS, true);
            DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(MainActivity.this, null,httpDataSourceFactory);
            Uri daUri = Uri.parse(streamUrl);
            mVideoSource = new HlsMediaSource(daUri, dataSourceFactory, 1, null, null);
        }

        initExoPlayer();

        if (mExoPlayerFullscreen) {
            ((ViewGroup) mExoPlayerView.getParent()).removeView(mExoPlayerView);
            mFullScreenDialog.addContentView(mExoPlayerView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT));
            mFullScreenIcon.setImageDrawable(ContextCompat.getDrawable(MainActivity.this,
            R.drawable.ic_fullscreen_shrink));
            mFullScreenDialog.show();
        }
    }

    @Override
    protected void onPause() {

        super.onPause();

        if (mExoPlayerView != null && mExoPlayerView.getPlayer() != null) {
            mResumeWindow = mExoPlayerView.getPlayer().getCurrentWindowIndex();
            mResumePosition = Math.max(0, mExoPlayerView.getPlayer().getContentPosition());
            mExoPlayerView.getPlayer().release();
        }

        if (mFullScreenDialog != null)
            mFullScreenDialog.dismiss();
    }
}

Answer 1

您应该查看handling configuration changes yourself - 正如@marcbaechinger上面提到的那样。

必要的部分在这里：

<activity android:name=".MyActivity"
          android:configChanges="orientation|screenSize"
          android:label="@string/app_name">

最重要的部分是：

请记住：当您声明活动以处理配置更改时，您有责任重置您提供备选方案的任何元素。如果您声明活动以处理方向更改并且图像应在横向和纵向之间更改，则必须在onConfigurationChanged（）期间将每个资源重新分配给每个元素。

但如果您没有任何横向特定的布局文件或图像，那么您可能会没事。

我们必须编写自己的全屏逻辑进行轮换，但这很简单，因为Android会为您提供配置更改事件。

为了对这种方法有一点额外的有效性，谷歌通过Youtube player documentation推荐（特别是关于全屏）：

要为支持纵向的活动实现此目的，您需要指定您的活动在应用程序的清单中自行处理某些配置更改，包括orientation，keyboardHidden和screenSize。

关于方向改变的延迟层

1 个答案: