android:即使应用程序关闭也能收到短信

Question

我正在编写一个应用程序，即使在应用程序关闭后它也应该可以运行。这是我为接受传入的短信而编写的代码。

public class SMSReceiver extends BroadcastReceiver {

    private ResultReceiver receiver;
    private Context context;

    @Override
    public void onReceive(Context context, Intent intent) {
        this.context = context;

        // Parse the SMS.
        Bundle bundle = intent.getExtras();
        SmsMessage[] msgs = null;
        String str = "";
        if (bundle != null)
        {
            // Retrieve the SMS.
            Object[] pdus = (Object[]) bundle.get("pdus");
            msgs = new SmsMessage[pdus.length];
            for (int i=0; i<msgs.length; i++)
            {
                msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);

                str += "SMS from " + msgs[i].getOriginatingAddress();
                str += " :\n";
                str += " :\n";
                str += "MessageBody: ";
                str += msgs[i].getMessageBody();

            }
            Log.i("SmsReceiver message := " + str);
        }
    }
}

我已经在我的主要 Activity 中注册了这个广播。而且我没有注销广播。

这在我的应用程序启动时有效，但在应用程序关闭时无效。

如何在应用程序关闭后仍能收到短信？感谢您的帮助。

谢谢

Answer 1

您可以让接收器作为服务运行。这是我使用的代码:

public class Communicator extends Service
{

private final String TAG = this.getClass().getSimpleName();

private SMSReceiver mSMSreceiver;
private IntentFilter mIntentFilter;

@Override
public void onCreate()
{
    super.onCreate();


    Log.i(TAG, "Communicator started");
    //SMS event receiver
    mSMSreceiver = new SMSReceiver();
    mIntentFilter = new IntentFilter();
    mIntentFilter.addAction("android.provider.Telephony.SMS_RECEIVED");
    mIntentFilter.setPriority(2147483647);
    registerReceiver(mSMSreceiver, mIntentFilter);

    Intent intent = new Intent("android.provider.Telephony.SMS_RECEIVED");
    List<ResolveInfo> infos = getPackageManager().queryBroadcastReceivers(intent, 0);
    for (ResolveInfo info : infos) {
        Log.i(TAG, "Receiver name:" + info.activityInfo.name + "; priority=" + info.priority);
    }
}

@Override
public void onDestroy()
{
    super.onDestroy();

    // Unregister the SMS receiver
    unregisterReceiver(mSMSreceiver);
}

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

private class SMSReceiver extends BroadcastReceiver
{
    private final String TAG = this.getClass().getSimpleName();

    @Override
    public void onReceive(Context context, Intent intent)
    {
        Bundle extras = intent.getExtras();


        String strMessage = "";

        if ( extras != null )
        {
            Object[] smsextras = (Object[]) extras.get( "pdus" );

            for ( int i = 0; i < smsextras.length; i++ )
            {
                SmsMessage smsmsg = SmsMessage.createFromPdu((byte[])smsextras[i]);

                String strMsgBody = smsmsg.getMessageBody().toString();
                String strMsgSrc = smsmsg.getOriginatingAddress();

                strMessage += "SMS from " + strMsgSrc + " : " + strMsgBody;                    


                if (strMsgBody.contains(Constants.DELIMITER)) {

                    Intent msgIntent = new Intent(Constants.INTENT_INCOMMING_SMS);
                    msgIntent.putExtra(Constants.EXTRA_MESSAGE, strMsgBody);
                    msgIntent.putExtra(Constants.EXTRA_SENDER, strMsgSrc);
                    sendBroadcast(msgIntent);

                    this.abortBroadcast();
                }
            }



        }

    }

}
}

记得将其添加到 list 中:

<service android:name="yourpakage.Communicator" />

现在您可以通过启动服务来开始监听传入的 SMS 消息:

startService(new Intent(this, Communicator.class));

我在我的 Activity 的 onDestroy 中停止了该服务，但我想您可以让它继续运行，甚至注册它以便在设备启动时像任何其他服务一样启动。

这是停止服务的代码:

stopService(new Intent(this, Communicator.class));

如果您还想在某个时候发送 SMS，我在这里就此主题做了相当广泛的回答:Send SMS until it is successful