Hi there.. as the title says, how can I call a method in an activity without bringing the app to the front? For example, when one gets a notification of a new mail and presses the "Delete" button inside the notification, the notification is dismissed and the mail is deleted in the background without starting the app.

The only way I found to do it is to keep a static reference to the main activity and using that reference to call a public method from a BroadcastReceiver, but that only works if the activity is alive. If I launch an intent for the activity, it's started and brought to the front.

Does anyone know how app achieve that behavior?