SMS Received in my SMS app and in Hangouts, although I call abortBroadcast()

Question

I have an SMS blocker Android application developed myself which was working quite well capturing all the spams until recently Google updated its Hangouts app to work with S

Answer 1

When you register receiver, set priority of filter to INTEGER.MAX_VALUE. Now abortBroadcast() will work;

    receiver = new HightPrioritySmsReceiver();
    IntentFilter filter = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");
    filter.setPriority(Integer.MAX_VALUE);
    registerReceiver(receiver, filter);

Answer 2

Hangouts uses the maximum possible priority (999 per the Intent-Filter docs) and therefore you cannot abort it on <4.4 releases. On 4.4+, only the default SMS app (blog post with details) can receive SMS notifications - users would need to set your app as the default SMS app for your app to function correctly (although it should function as expected if that happens).