Android - MediaSession 不捕获关键事件,但是在 logcat 中看到
Android - MediaSession doesn't capture key events however seen in logcat
这是捕获任何媒体键事件的代码
final MediaSession session = new MediaSession(getApplicationContext(), "TAG");
session.setCallback(new MediaSession.Callback() {
@Override
public boolean onMediaButtonEvent(final Intent mediaButtonIntent) {
Toast.makeText(getApplication(), "key events captured", Toast.LENGTH_LONG).show();
return super.onMediaButtonEvent(mediaButtonIntent);
}
});
session.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS |
MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);
PlaybackState state = new PlaybackState.Builder()
.setActions(
PlaybackState.ACTION_PLAY | PlaybackState.ACTION_PLAY_PAUSE |
PlaybackState.ACTION_PLAY_FROM_MEDIA_ID | PlaybackState.ACTION_PAUSE |
PlaybackState.ACTION_SKIP_TO_NEXT | PlaybackState.ACTION_SKIP_TO_PREVIOUS)
.setState(PlaybackState.STATE_STOPPED, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 0)
.build();
session.setPlaybackState(state);
session.setActive(true);
我在新创建的 android 项目中使用了它,并且一切正常 (我可以从前景和背景捕获关键事件),但是,我使用了这个代码在另一个项目中,无法捕获任何关键事件,可能有什么覆盖这个或其他东西捕获关键事件,如何解决这个问题?我尝试删除(onKeyDown 和 onKeyUp)功能但仍然没有用
注意:单击按钮后,我可以在 logcat 中看到此内容:
07-25 22:08:08.604 688-4294/system_process D/MediaSessionService: dispatchMediaKeyEvent, pid=9965, uid=10070, event=KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_MEDIA_PLAY_PAUSE, scanCode=164, metaState=0, flags=0x8, repeatCount=0, eventTime=2967810, downTime=2967810, deviceId=8, source=0x101 }
07-25 22:08:08.605 688-4294/system_process D/MediaSessionService: Sending media key to com.example.mediabuttons/TAG
07-25 22:08:08.605 9965-9965/com.example.mediabuttons D/MediaSessionHelper: dispatched media key KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_MEDIA_PLAY_PAUSE, scanCode=164, metaState=0, flags=0x8, repeatCount=0, eventTime=2967810, downTime=2967810, deviceId=8, source=0x101 }
我发现了问题,
我只需要将 MediaSession 对象声明为 public 静态对象,我是 android 的新手,我不知道为什么这样可以解决问题。
这是捕获任何媒体键事件的代码
final MediaSession session = new MediaSession(getApplicationContext(), "TAG");
session.setCallback(new MediaSession.Callback() {
@Override
public boolean onMediaButtonEvent(final Intent mediaButtonIntent) {
Toast.makeText(getApplication(), "key events captured", Toast.LENGTH_LONG).show();
return super.onMediaButtonEvent(mediaButtonIntent);
}
});
session.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS |
MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);
PlaybackState state = new PlaybackState.Builder()
.setActions(
PlaybackState.ACTION_PLAY | PlaybackState.ACTION_PLAY_PAUSE |
PlaybackState.ACTION_PLAY_FROM_MEDIA_ID | PlaybackState.ACTION_PAUSE |
PlaybackState.ACTION_SKIP_TO_NEXT | PlaybackState.ACTION_SKIP_TO_PREVIOUS)
.setState(PlaybackState.STATE_STOPPED, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 0)
.build();
session.setPlaybackState(state);
session.setActive(true);
我在新创建的 android 项目中使用了它,并且一切正常 (我可以从前景和背景捕获关键事件),但是,我使用了这个代码在另一个项目中,无法捕获任何关键事件,可能有什么覆盖这个或其他东西捕获关键事件,如何解决这个问题?我尝试删除(onKeyDown 和 onKeyUp)功能但仍然没有用
注意:单击按钮后,我可以在 logcat 中看到此内容:
07-25 22:08:08.604 688-4294/system_process D/MediaSessionService: dispatchMediaKeyEvent, pid=9965, uid=10070, event=KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_MEDIA_PLAY_PAUSE, scanCode=164, metaState=0, flags=0x8, repeatCount=0, eventTime=2967810, downTime=2967810, deviceId=8, source=0x101 }
07-25 22:08:08.605 688-4294/system_process D/MediaSessionService: Sending media key to com.example.mediabuttons/TAG
07-25 22:08:08.605 9965-9965/com.example.mediabuttons D/MediaSessionHelper: dispatched media key KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_MEDIA_PLAY_PAUSE, scanCode=164, metaState=0, flags=0x8, repeatCount=0, eventTime=2967810, downTime=2967810, deviceId=8, source=0x101 }
我发现了问题,
我只需要将 MediaSession 对象声明为 public 静态对象,我是 android 的新手,我不知道为什么这样可以解决问题。