Can an activity receive an unordered broadcast(incoming call) intent before system's default receiver?

Question

Here is the scenario :

An activity is displayed(active). If a phone call comes, the activity should receive the intent (send the \"incoming call screen\" to the back

Answer 1

This is how I solved it :

Manifest.xml

...


    
    



    
        
         
        
 

MyPhoneBroadcastReceiver.java

public void onReceive(final Context context, Intent intent) {
    Bundle extras = intent.getExtras();
    ...
    if (extras != null) {
    String state = extras.getString(TelephonyManager.EXTRA_STATE);

     if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
             new Handler().postDelayed(new Runnable() {
          public void run() {
              Intent intentPhoneCall = new Intent("android.intent.action.ANSWER");
                      intentPhoneCall.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          context.startActivity(intentPhoneCall);
                  }
             }, 100);
         }
    }
}

LockScreenActivity.java - A regular activity class with UI that shows up saying your screen is locked. It covers 100% area of your screen i.e. no navigation/status bar. Also the HOME/MENU keys have been disabled. This is how I achieved that : How can I detect user pressing HOME key in my activity?

P.S. : The trick is not the main logic but a 100ms delay. Without it your custom(home) lock screen will be removed by the system default incoming call screen everytime you get a call on the phone!