popups.java

//Only for popups (FRIENDLY_POPUP or ANNOYING_POPUP)
//You MUST do this, otherwise popups will not work.
//Call it in the Activity you want to show the popup.
//You can show the popup in many screens by adding this in more than one Activity.
@Override
protected void onResume() {
    super.onResume();
    PushLink.setCurrentActivity(this);
}