Receive SMS and show notification

Question

I'm trying to build a code that shows notification on SMS receive. My problem is that how do I implement broadcast receiver to my main activity because in my main activity I also have other functions working. If I try to create another class that extends broadcast receiver then how do I call that from the main class? Does it automatically start the function as soon as the message is received or does it need to be provoked from the main activity?

score 2 · Answer 1 · edited May 23 '17 at 12:09

did you see this question ? anyway try this :

public class SmsListener extends BroadcastReceiver{

    private SharedPreferences preferences;

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub

        if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")){
            Bundle bundle = intent.getExtras();           //---get the SMS message passed in---
            SmsMessage[] msgs = null;
            String msg_from;
            if (bundle != null){
                //---retrieve the SMS message received---
                try{
                    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]);
                        msg_from = msgs[i].getOriginatingAddress();
                        String msgBody = msgs[i].getMessageBody();
                    }
                }catch(Exception e){
//                            Log.d("Exception caught",e.getMessage());
                }
            }
        }
    }
}

Note: In your manifest file add the BroadcastReceiver-

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

Add this permission:

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

also you build notification by using the Notification.Builder

score 0 · Answer 2 · answered Jan 10 '17 at 18:24

If I were you I would put an intent call in the onReceive method of the broadcast receiver to which you pass a bundle value and then on the mainactivity look to see if that bundle exists and if so do whatever action you wish to do (e.g. show a dialog, toast, etc.).

score 0 · Answer 3 · answered Jan 10 '17 at 18:26

Broadcast receiver will be invoked by android as long as you have it properly registered (either via code or in your manifest xml). You will be given access to a context in the receiver callbacks. From that context you can either create a Notification (based on the title of this question) or access applicationContext which would be your Application subclass IF you declared one in your manifest xml.

score -1 · Answer 4 · answered Jan 10 '17 at 18:37

@another, try implementing in the following way :

public class MyActivity extends Activity {
    private BroadcastReceiver receiver = new BroadcastReceiver() {
        // Get the object of SmsManager
    final SmsManager sms = SmsManager.getDefault();

    public void onReceive(Context context, Intent intent) {

        // Retrieves a map of extended data from the intent.
        final Bundle bundle = intent.getExtras();

        try {

            if (bundle != null) {

                final Object[] pdusObj = (Object[]) bundle.get("pdus");

                for (int i = 0; i < pdusObj.length; i++) {

                    SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
                    String phoneNumber = currentMessage.getDisplayOriginatingAddress();

                    String senderNum = phoneNumber;
                    String message = currentMessage.getDisplayMessageBody();

                    Log.i("SmsReceiver", "senderNum: "+ senderNum + "; message: " + message);


                   // Show Alert
                    int duration = Toast.LENGTH_LONG;
                    Toast toast = Toast.makeText(context, 
                                 "senderNum: "+ senderNum + ", message: " + message, duration);
                    toast.show();

                } // end for loop
              } // bundle is null

        } catch (Exception e) {
            Log.e("SmsReceiver", "Exception smsReceiver" +e);

        }
    }   
   });

    public void onResume() {
        super.onResume();

        IntentFilter filter = new IntentFilter();
        filter.addAction(BROADCAST_ACTION);

        this.registerReceiver(this.receiver, filter);
    }

    public void onPause() {
        super.onPause();

        this.unregisterReceiver(this.receiver);
    }
}

Receive SMS and show notification

4 Answers4