VideoView申请音频焦点问题(videoleap怎么加音频)

发布时间：2024-02-27

问题现象：使用VideoView写了一个悬浮框播放视频程序，在悬浮框代码中注册音频焦点监听事件，监听悬浮框的音频焦点获取和丢失。发现悬浮框和Music同时播放了。分析：通过log分析当时音频焦点的获取情况，如下：I/MediaFocusControl( ): AudioFocus requestAudioFocus() from android.media.AudioManager@afcom.android.gallery3d.app.MoviePlayer$@ff0I/MediaFocusControl( ): AudioFocus requestAudioFocus() from android.media.AudioManager@bf9ccom.android.gallery3d.ui.FloatVideoView$1@da5I/MediaFocusControl( ): AudioFocus abandonAudioFocus() from android.media.AudioManager@afcom.android.gallery3d.app.MoviePlayer$@ff0I/MediaFocusControl( ): AudioFocus removeFocusStackEntry(): removing entry for android.media.AudioManager@afcom.android.gallery3d.app.MoviePlayer$@ff0I/MediaFocusControl( ): AudioFocus requestAudioFocus() from android.media.AudioManager@bf9cI/MediaFocusControl( ): AudioFocus abandonAudioFocus() from android.media.AudioManager@ccI/MediaFocusControl( ): AudioFocus requestAudioFocus() from android.media.AudioManager@c5fddcom.android.music.MediaPlaybackService$3@a0e8ca2会发现，首先视频播放器MoviePlayer获取焦点。再打开悬浮框，悬浮框FloatVideoView获取焦点，MoviePlayer丢失焦点。可是在这里我们会发现，紧接着未知东西又申请了音频焦点，造成悬浮框FloatVideoView丢失音频焦点，而且没有再获取。故，当进入Music时候两者同时响起。通过跟踪代码发现在VideoView中有申请音频焦点：/frameworks/base/core/java/android/widget/VideoView.javaprotected void openVideo() { ........ AudioManager am = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE); am.requestAudioFocus(null, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); ........}同时，由于requestAudioFocus的监听事件（第一个参数）为空，所以在log中不会打印出申请音频焦点的类名。也就造成了该现象。

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