如何仅在启动服务时接受音量键的广播监听器

public class VolumeBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // 处理接收到的广播消息
        if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())) {
            KeyEvent event = intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
            if (event != null && event.getKeyCode() == KeyEvent.KEYCODE_VOLUME_UP) {
                // 处理音量增加的操作
                // ...
            } else if (event != null && event.getKeyCode() == KeyEvent.KEYCODE_VOLUME_DOWN) {
                // 处理音量减少的操作
                // ...
            }
        }
    }
}

public class MyService extends Service {
    private VolumeBroadcastReceiver receiver;

    @Override
    public void onCreate() {
        super.onCreate();
        // 创建广播接收器实例
        receiver = new VolumeBroadcastReceiver();

        // 创建IntentFilter，并添加接收的广播动作
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_MEDIA_BUTTON);

        // 注册广播接收器
        registerReceiver(receiver, filter);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        // 取消注册广播接收器
        unregisterReceiver(receiver);
    }

    // 其他服务相关的代码...
}

<receiver android:name=".VolumeBroadcastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.MEDIA_BUTTON" />
    </intent-filter>
</receiver>