Exit app on second back button click - Android -


i have log in screen , on log in screen if press button once nothing happens if press second time app stops/exits, have seen other questions on here me non of solutions work ...

any appreciated thank you!

this attempt of mine doesnt exit on second press restarts app , when click twice again exits ... ; 

@override     public void onbackpressed() {         if (doublebacktoexitpressedonce) {             super.onbackpressed();             return;         }          this.doublebacktoexitpressedonce = true;         toast.maketext(this, "please click again exit", toast.length_short).show();          new handler().postdelayed(new runnable() {              @override             public void run() {                 doublebacktoexitpressedonce=false;             }         }, 2000);     }

try one:

private static long saybackpress;  @override public void onbackpressed() {     if (saybackpress + 2000 > system.currenttimemillis()){         super.onbackpressed();     }     else{         toast.maketext(mainactivity.this, "press once again exit!", toast.length_short).show();         saybackpress = system.currenttimemillis();     } }

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