Try this..
public class MyOutgoingCallHandler extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// Extract phone number reformatted by previous receivers
String phoneNumber = getResultData();
if (phoneNumber == null) {
// No reformatted number, use the original
phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
}
if(phoneNumber.equals("1234")){ // DialedNumber checking.
// My app will bring up, so cancel the broadcast
setResultData(null);
// Start my app
Intent i=new Intent(context,MainActivity.class);
i.putExtra("extra_phone", phoneNumber);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
And refer this for detail..