短按耳机键暂停/播放FM功能的实现

短按耳机键默认是暂停/播放音乐功能，按照如下的修改方式可以实现短按耳机键暂停/播放FM

please delete your media button code, modify as below:
1. AndroidMenifest.xml :
<receiver android:name=".FMRadioActivity$MediaButtonReceiver">
            <intent-filter>
                <action android:name="android.intent.action.MEDIA_BUTTON" />
            </intent-filter>
        </receiver>
 
2. FMRadioActivity.java code:
 
public interface MediaButtonListener {
        void onMediaButtonCall(Intent intent);
    }
   
    private MediaButtonListener mMediaButtonListener = new MediaButtonListener() {
 
        @Override
        public void onMediaButtonCall(Intent intent) {
            String action = intent.getAction();
            LogUtils.d(TAG, "onMediaButtonCall.action:" + action);
            KeyEvent event = (KeyEvent)
                    intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT); 
            LogUtils.d(TAG, "onMediaButtonCall.event:" + event);
            if (Intent.ACTION_MEDIA_BUTTON.equals(action)) {
                LogUtils.d(TAG, "--Mediareceiver.event.getKeyCode(): " + event.getKeyCode());
                LogUtils.d(TAG, "--Mediareceiver.event.getAction(): " + event.getAction());
                if (KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE == event.getKeyCode() && event.getAction() == KeyEvent.ACTION_UP) {
                    LogUtils.d(TAG, "--Mediareceiver.pause");
                   
                    if (mIsPlaying) {
                        LogUtils.d(TAG, "onMediaButtonCall.power down fm");
                         refreshImageButton(false); refreshActionMenuItem(false);
                         refreshPopupMenuItem(false);
                         refreshActionMenuPower(false); exitService();
                    }
                   
                } else if (KeyEvent.KEYCODE_MEDIA_NEXT == event.getKeyCode() && event.getAction() == KeyEvent.ACTION_UP) {
                   
                     if (mIsPlaying) {
                         LogUtils.d(TAG, "onMediaButtonCall.seek next station");
                         seekStation(mCurrentStation, true);
                     }
                }
            }
        }
    };
   
    public static class MediaButtonReceiver extends BroadcastReceiver {
        static MediaButtonListener mListener = null;
       
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (null != mListener) {
                mListener.onMediaButtonCall(intent);
                this.abortBroadcast();
            }
        }
        public static void registerMediaButtonListener(MediaButtonListener callback) {
            mListener = callback;
        }
    }
 
onCreate method:
MediaButtonReceiver.registerMediaButtonListener(mMediaButtonListener);
       
        ComponentName rec = new ComponentName(getPackageName(),
                MediaButtonReceiver.class.getName());
        mAudioManager.registerMediaButtonEventReceiver(rec);
 
powerupFM method:
        mAudioManager.registerMediaButtonEventReceiver(new ComponentName(this.getPackageName(),
                MediaButtonReceiver.class.getName()));
 
exitService method:
        mAudioManager.unregisterMediaButtonEventReceiver(new ComponentName(this.getPackageName(),
                MediaButtonReceiver.class.getName()));