android - How to detect when I move from one activity to another? -

how can detect when moving 1 activity using

intent.action_pick_activity 

?

i tried use intent.action_pick_activity detect when user moving 1 activity don't succeed. in fact, detect when user clicks on home button, button back, don’t know how can detect it.

i use code:

intentfilter filter = new intentfilter(intent.action_close_system_dialogs); rmconfig.context.registerreceiver(batteryreceiver, filter); 

use:

public void onwindowfocuschanged (boolean hasfocus) 

for more info, check this