android 耳机按键监控,Android耳机按键监听

在Android中，可以通过注册BroadcastReceiver来监听耳机按键事件。

首先，在AndroidManifest.xml中添加以下权限：

<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

然后，在代码中注册BroadcastReceiver：

public class EarphoneButtonReceiver extends BroadcastReceiver {
    private static final String TAG = "EarphoneButtonReceiver";
    
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (Intent.ACTION_MEDIA_BUTTON.equals(action)) {
            KeyEvent event = intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
            if (event != null && event.getAction() == KeyEvent.ACTION_DOWN) {
                int keyCode = event.getKeyCode();
                switch (keyCode) {
                    case KeyEvent.KEYCODE_MEDIA_PLAY:
                        // 处理播放事件
                        break;
                    case KeyEvent.KEYCODE_MEDIA_PAUSE:
                        // 处理暂停事件
                        break;
                    case KeyEvent.KEYCODE_MEDIA_NEXT:
                        // 处理下一曲事件
                        break;
                    case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
                        // 处理上一曲事件
                        break;
                    case KeyEvent.KEYCODE_MEDIA_STOP:
                        // 处理停止事件
                        break;
                    default:
                        break;
                }
            }
        }
    }
}

最后，在需要监听耳机按键事件的Activity中注册BroadcastReceiver：

private EarphoneButtonReceiver mEarphoneButtonReceiver;

private void registerEarphoneButtonReceiver() {
    mEarphoneButtonReceiver = new EarphoneButtonReceiver();
    IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
    registerReceiver(mEarphoneButtonReceiver, filter);
}

private void unregisterEarphoneButtonReceiver() {
    if (mEarphoneButtonReceiver != null) {
        unregisterReceiver(mEarphoneButtonReceiver);
        mEarphoneButtonReceiver = null;
    }
}

@Override
protected void onResume() {
    super.onResume();
    registerEarphoneButtonReceiver();
}

@Override
protected void onPause() {
    super.onPause();
    unregisterEarphoneButtonReceiver();
}

这样，当耳机按键事件发生时，系统会发送一个广播，我们就可以在BroadcastReceiver中处理相应的事件了。