How to register a receiver in the main activity?

Question

I have a SmsReceiver class that I want to register in the main activity, what exactly should I do ?

I am new to Android.

You can take a look at this post http://stackoverflow.com/questions/4660823/android-alarm-not-working/4661122#4661122 — ccheneson, Jan 18 '13 at 10:53
There is plenty of answers on this topic. Check [this](http://stackoverflow.com/a/4805733/1521064), [this](http://stackoverflow.com/questions/4134203/how-to-use-registerreceiver-method) and [this](http://stackoverflow.com/questions/6508300/how-to-register-broadcast-receiver). — vault, Jan 18 '13 at 11:00
possible duplicate of [Programmatically register a broadcast receiver](http://stackoverflow.com/questions/4805269/programmatically-register-a-broadcast-receiver) — glomad, Jan 18 '13 at 15:22

score 5 · Accepted Answer · answered Jan 18 '13 at 11:01

Either you can do 2 things:

Create and define BroadcastReceiver in the Manifest
Create and register the BroadcastReceiver in code.

For option 2 (which you are asking):

Create a BroadcastReceiver in code (MyBroadcastReceiver). Declare MyBroadcastReceiver in the scope of your Activity:

MyBroadcastReceiver mMyBroadcastReceiver;

Register the BroadcastReceiver in your Activity by:

IntentFilter filter = new IntentFilter(android.provider.Telephony.SMS_RECEIVED);
this.registerReceiver(mMyBroadcastReceiver, filter);

score 2 · Answer 2 · answered Jan 18 '13 at 10:54

To have a Service receive SMS messages follow next steps:

Update the manifest to give your app the permissions to receive SMS (WRITE_SMS, READ_SMS, RECEIVE_SMS)
DO NOT update the manifest with the receiver intent filter ! (which every sample code online seems to do)

In your Service, create a nested BroadcastReceiver class within your Service class

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;                    

                Log.i(TAG, strMessage);
            }

        }

    }

}

In your Service class, register to receive the android.provider.Telephony.SMS_RECEIVED intent filter :

public class ServiceCommunicator extends Service
{
    private SMSreceiver mSMSreceiver;
    private IntentFilter mIntentFilter;

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

        //SMS event receiver
        mSMSreceiver = new SMSreceiver();
        mIntentFilter = new IntentFilter();
        mIntentFilter.addAction("android.provider.Telephony.SMS_RECEIVED");
        registerReceiver(mSMSreceiver, mIntentFilter);
    }

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

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

That's it !

note: encase you're wondering why I didn't bind to my service from within a separate BroadcastReceiver class - it doesn't work because bindService() isn't available.

score 1 · Answer 3 · answered Jan 20 '17 at 15:16

1

For API level 19 and above

 IntentFilter smsFilter = new IntentFilter();
 smsFilter.addAction(Telephony.Sms.Intents.SMS_RECEIVED_ACTION);
registerReceiver(this.receiver, filter);

answered Jan 20 '17 at 15:16

Zohra Khan

5,024
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Vikalp Patel · Answer 4 · 2013-01-18T11:14:45.227

As you've asked to register BroadcastReceiver inside your MainActivity that fits to registerReceiver-codewise-inside-MainActivity

Here's what code looks like ==>

public class MainActivity extends Activity 
{
BroadcastReceiver smsReceiver;
private IntentFilter myFilter = new IntentFilter(android.provider.Telephony.SMS_RECEIVED);

   protected void onCreate(Bundle savedInstanceState) 
   {
    super.onCreate(savedInstanceState);
    registerReceiver(smsReceiver, myFilter); // register BroadCastReceiver at time of initialization of Activity with proper Intent-Filter
   }

@Override
  protected void onPause() 
   {
    unregisterReceiver(smsReceiver); // UnRegister BroadCastReceiver as you no longer have your activity at Foreground -- Saving CPU & Battery Drainage
    super.onPause();
   }

 @Override
   protected void onResume() 
   {
    registerReceiver(smsReceiver, myFilter); // Register BroadCastReceiver Once again as your activity comes from pause to forground state again.
    super.onResume();
   }

  smsReceiver = new BroadcastReceiver() //Implementation of your BroadCastReceiver
  {

    @Override
    public void onReceive(Context context, Intent intent)
    {
       // Do whatever you like as sms is received and caught by these BroadCastReceiver
        Toast.makeText(context, "SMS Received", Toast.LENGTH_LONG).show();          
    }
  };
 }

score 0 · Answer 5 · edited Sep 30 '16 at 06:18

0

private BroadcastReceiver receiver = new BroadcastReceiver() {

   @Override
   public void onReceive(Context context, Intent intent) {
       //some action
   }
};

IntentFilter filter = new IntentFilter("YOUR_ACTION");
registerReceiver(receiver, filter);

Hope this helps

edited Sep 30 '16 at 06:18

Sanoop Surendran

3,361
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answered Sep 30 '16 at 05:58

Priyanka

361
1
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How to register a receiver in the main activity?

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