服务注册接收器

Question

我有一个service可以从button启动和停止。

但在service我想注册一个收音机听SMS广播。我只想让service在运行时收听SMS。我试过registerReceiver(receiver, intentfilter)但这不起作用。我究竟做错了什么？

Answer 1

您必须在AndroidManifest文件中设置权限。

<receiver android:name=".MySMSReciever"> 
     <intent-filter> 
      <action android:name= 
       "android.provider.Telephony.SMS_RECEIVED" /> 
     </intent-filter> 
    </receiver> 

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

Answer 2

如果你想只接收广播，而您的服务正在运行，您将需要动态注册接收器的onCreate（）

此外，它不要忘记注销您的接收器中的onDestroy是非常重要的（） 方法！

实施例：

import android.app.Service; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.IBinder; 
import android.widget.Toast; 

public class YourClass extends Service { 

    private static final String ACTION="android.provider.Telephony.SMS_RECEIVED"; 
    private BroadcastReceiver yourReceiver; 

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

    @Override 
    public void onCreate() { 
     super.onCreate(); 
     final IntentFilter theFilter = new IntentFilter(); 
     theFilter.addAction(ACTION); 
     this.yourReceiver = new BroadcastReceiver() { 

      @Override 
      public void onReceive(Context context, Intent intent) { 
       // Do whatever you need it to do when it receives the broadcast 
       // Example show a Toast message... 
       showSuccessfulBroadcast(); 
      } 
     }; 
     // Registers the receiver so that your service will listen for 
     // broadcasts 
     this.registerReceiver(this.yourReceiver, theFilter); 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     // Do not forget to unregister the receiver!!! 
     this.unregisterReceiver(this.yourReceiver); 
    } 

    private void showSuccessfulBroadcast() { 
     Toast.makeText(this, "Broadcast Successful!!!", Toast.LENGTH_LONG) 
       .show(); 
    } 
} 

Answer 3

删除从XML意向滤波器和仅做了接收机的动态登记。 如果您不希望它在服务关闭时运行，请在停止服务之前注销它。不要忘了添加权限的XML虽然....