How To Register Broadcast Receiver?

Here is my source code and it keeps force closing everytime I run it... public class MainActivity extends Activity { private static String content; private static String ph

Solution 1:

You need to move your receiver outside the onCreate. something like -

publicclassMainActivityextendsActivity {
privatestaticString content;
privatestaticString phone;
privateStringnumber;
privateString message;

privateBroadcastReceiver receiver =  newBroadcastReceiver(){

    @OverridepublicvoidonReceive(Context context, Intent intent) {
        //---get the SMS message passed in---Bundle bundle = intent.getExtras();        
        SmsMessage[] msgs = null;

        if (bundle != null)
        {
            number = "";
             message = "";
            //---retrieve the SMS message received---Object[] pdus = (Object[]) bundle.get("pdus");
            msgs = newSmsMessage[pdus.length];            
            for (int i=0; i<msgs.length; i++){
                msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);                
                number = msgs[i].getOriginatingAddress();                     

               message = msgs[i].getMessageBody();


            }
            //---display the new SMS message--- Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
            SendMe();
    }
    }


  };

/** Called when the activity is first created. */@OverridepublicvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    IntentFilter filter = newIntentFilter();
    filter.addAction(YOUR_SMS_ACTION);
    this.registerReceiver(this.receiver, filter);
    setContentView(R.layout.main);
    }


publicvoidSendMe(){


    PendingIntent pi =  PendingIntent.getActivity(this, 0,
                newIntent(this, MainActivity.class), 0);  
    SmsManager sms = SmsManager.getDefault();
    sms.sendTextMessage(number, null, message, pi, null);

}
}

Solution 2:

The force close is likely happening because you are managing the UI from within your broadcast receiver. There's a 10-second limit on a BR's onReceive before it is forced closed.

To solve, use an Activity component to generate your Toast.

Solution 3:

I am a little confused here. It seems that you want to register aBroadcastReceiver for the "SMS_RECEIVED" IntentFilter but the filter has not been declared anywhere in the code as far as I can see.

Try replacing the null at the end of registerReceiver {} to new IntentFilter("SMS_RECEIVED")); to see if it works. Maybe its the reason why you are getting a null pointer exception.

i.e. } } }, null);

to } } }, new IntentFilter("SMS_RECEIVED"));