服务不会活着

Question

我正在编写一个监听传入短信的应用程序.所以我写了一个服务,为此启动了BroadcastReceiver.该服务由我的应用程序启动,但当后者被销毁时,我的服务似乎没有听到任何内容.由于此服务的目的是侦听传入的SMS,因此必须"永久"运行(或由于内存管理而重新启动).

这是一些代码:

public class SmsService extends Service {

    private final static String TAG = SmsService.class.getSimpleName();
    public static boolean SMS_SERVICE_STARTED = false;
    private boolean mRegistered = false;
    public final static String SMS_PORT = "port";

    private SMSReceiver mSmsReceiver = null; // this is the BroadcastReceiver listening to SMS

    public SmsService() {
        super();
        Log.d(TAG, "SmsService");
    }

    @Override
    public void onCreate() {
        Log.d(TAG, "onCreate");
        SMS_SERVICE_STARTED = true;
    }

    @Override
    public void onDestroy() {
        Log.d(TAG, "onDestroy");
        stopListenSms();
        SMS_SERVICE_STARTED = false;
    }

    @Override
    public IBinder onBind(Intent intent) {
        Log.d(TAG, "onBind");
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d(TAG, "onStartCommand");

        if (intent != null && intent.hasExtra(SMS_PORT)) {
            Log.d(TAG, "we got extra!");
            short port = intent.getShortExtra(SMS_PORT, (short) 0);
            startListenSms(port);
        } else {
            Log.d(TAG, "no extra :(");
        }

        return START_STICKY;
    }

    private void startListenSms(short port) {
        Log.d(TAG, "startListenSms on port " + port);

        mSmsReceiver = new SMSReceiver();
        IntentFilter filter = new IntentFilter(
                "android.intent.action.DATA_SMS_RECEIVED");
        filter.addDataScheme("sms");
        String strPort = String.valueOf(port);
        filter.addDataAuthority("localhost", strPort);
        registerReceiver(mSmsReceiver, filter);
        mRegistered = true;
    }

    private void stopListenSms() {
        Log.d(TAG, "stopListenSms");
        if (mSmsReceiver != null) {
            if (mRegistered)
                unregisterReceiver(mSmsReceiver);
            mSmsReceiver = null;
        }
    }
}

我观察到它的活动被销毁时,使用null Intent调用onStartCommand.你知道为什么我的服务在活动被销毁时停止生活吗？我应该如何让它"永远"运行？

提前谢谢,干杯.

Answer 1

为什么需要运行服务来收听传入的短信.广播接收器本身用于此目的,一旦您在注册接收器时在意图过滤器中配置,它将继续监听传入消息.有大量的例子广播接收器和短信收听.请仔细阅读这些示例并有效地构建代码