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I have this requirement to send my application background and then bring it to foreground on some key capture intents (not from application launcher offcourse) So How can I send the current tasks to background and bring the same to foreground ?
Use moveTaskToBack() to send the activity in the background and still running if the user presses the back key.
see :Activity for the way on how to do this. its quite simple.
so in order to do this you will also need to override the onBackPressed() method or onKeyPressed() and call this method if the back button was pressed (dont forget to return true on the back pressed methods so android is aware that you consumed the event and doesnt finish the activity).
For returning to this activity that you have moved to the background you can post a notification with a pending intent to launch it back and that will automatically bring the activity to foreground.
Hope this helps.