Exoplayer 2可防止视频播放时屏幕变暗

Question

我有简单的玩家活动:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.epix.presentation.player.PlayerActivity">

    <com.google.android.exoplayer2.ui.SimpleExoPlayerView
        android:id="@+id/video_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</android.support.constraint.ConstraintLayout>

当视频运行时,屏幕会变暗,我必须点击屏幕才能让它再次变亮.我试过设置android:keepScreenOn="true",这当然没有用,因为屏幕不会关闭它只是昏暗.

有没有办法防止屏幕变暗发生？

Answer 1

希望这会对某人有所帮助.

setKeepScreenOn仅在视频播放和缓冲时进行设置,并在视频暂停/未播放时允许屏幕进入睡眠状态/发生任何错误.

playerView = exoPlayerLayout.findViewById(R.id.exo_player_view);
player = ExoPlayerFactory.newSimpleInstance(new DefaultRenderersFactory(context),
                new DefaultTrackSelector(), new DefaultLoadControl());

player.addListener(new PlayerEventListener());

PlayerEventListener

private class PlayerEventListener implements Player.EventListener {
    @Override
    public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
        if (playbackState == Player.STATE_IDLE || playbackState == Player.STATE_ENDED ||
                !playWhenReady) {

            playerView.setKeepScreenOn(false);
        } else { // STATE_IDLE, STATE_ENDED
            // This prevents the screen from getting dim/lock
            playerView.setKeepScreenOn(true);
        }
    }

    @Override
    public void onTimelineChanged(Timeline timeline, Object manifest) {}

    @Override
    public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {}

    @Override
    public void onLoadingChanged(boolean isLoading) {}

    @Override
    public void onRepeatModeChanged(int repeatMode) { }

    @Override
    public void onPlayerError(ExoPlaybackException error) { }

    @Override
    public void onPositionDiscontinuity() { }

    @Override
    public void onPlaybackParametersChanged(PlaybackParameters playbackParameters) { }
}

如果要根据需要进行修改,请在此处检查播放状态setKeepScreenOn.

Answer 2

最简单的方法是在ConstraintLayout元素中使用值为true的keepScreenOn属性：

android:keepScreenOn="true"

您可以选择以编程方式在活动的onCreate方法中执行此操作：

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

在developer.android.com上有一个关于保持屏幕打开状态的页面。