按照有关如何 use hardware playback control keys to control audio playback 的培训部分,我创建了一个监听器类:
public class RemoteControlReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent intent) {
if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())) {
KeyEvent event = (KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
Log.e(TAG, "ACTION_MEDIA_BUTTON");
int keycode = event.getKeyCode();
switch (keycode)
{
case KeyEvent.KEYCODE_MEDIA_NEXT:
Log.e(TAG, "KEYCODE_MEDIA_NEXT");
break;
case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
Log.e(TAG, "KEYCODE_MEDIA_PLAY_PAUSE");
break;
case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
Log.e(TAG, "KEYCODE_MEDIA_PREVIOUS");
break;
default:
}
if (/*KeyEvent.KEYCODE_MEDIA_PLAY*/ 126 == event.getKeyCode()) { // KEYCODE_MEDIA_PLAY undefined for API < 11
Log.e(TAG, "KEYCODE_MEDIA_PLAY");
}
}
}
}
在 Activity 的 onCreate() 中注册它:
private AudioManager mAudioManager;
private ComponentName mRemoteControlReceiver;
...
...
mAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
mRemoteControlReceiver = new ComponentName(this, RemoteControlReceiver.class);
mAudioManager.registerMediaButtonEventReceiver(mRemoteControlReceiver);
并将其注册到 list 中:
<receiver android:name=".RemoteControlReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
</receiver>
但是当按下这些按钮中的任何一个时,不会导致任何日志消息出现在 LogCat 上! (无论是否在播放我的媒体时被按下)
我的代码似乎拦截了来自其他媒体播放器的这些事件,但为什么我看不到任何 Log.e()
消息?我错过了什么?
顺便说一句,当我按下这些按钮中的任何一个时,会出现以下消息:
W/KeyCharacterMap(19801): Can't open keycharmap file
W/KeyCharacterMap(19801): Error loading keycharmap file '/system/usr/keychars/h2w_headset.kcm.bin'. hw.keyboards.131075.devname='h2w headset'
W/KeyCharacterMap(19801): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
最佳答案
您碰巧使用 Library Project 来实现它吗?
如果是这样,您将 <receiver>
放在了哪个 list 中?在?库的还是应用程序的?
如果你放在图书馆的,它是行不通的。您必须将它放在应用程序的 list 中:
<receiver android:name=".RemoteControlReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
</receiver>
关于android - 为什么 ACTION_MEDIA_BUTTON 无法处理事件?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15057291/