press back again to exit

Question

I have an app and I want to do that when user touch back button a Toast show "press back again to exit" but i have problem with this part. on this code, when touch back button app completely finish without toast and touch back button again. Please help me.

   public void onStop(){
        super.onStop();
        if(key == 1){
            key =0;
            finish();
        }else{
            Toast.makeText(getApplicationContext(), "press back Button again to exit", Toast.LENGTH_SHORT).show();
        key++;
        }
            return;
        }

score 4 · Accepted Answer · edited May 23 '17 at 10:29

4

@Override
public void onBackPressed() {
if (doubleBackToExitPressedOnce) {
    super.onBackPressed();
    return;
}

this.doubleBackToExitPressedOnce = true;
Toast.makeText(this, "Please click BACK again to exit", Toast.LENGTH_SHORT).show();

new Handler().postDelayed(new Runnable() {

    @Override
    public void run() {
        doubleBackToExitPressedOnce=false;                       
    }
}, 2000);
}

you can go though this link Clicking the back button twice to exit an activity

same question

edited May 23 '17 at 10:29

Community

1
1

answered Jul 02 '15 at 18:15

Abhishek

2,350
2
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I already mentioned link of this code in my answer. – Anand Singh Jul 02 '15 at 18:17
oops i didnt see first commit. :-) – Abhishek Jul 02 '15 at 18:18
Thanks Dear avi, I saw link but i likewise have problem and now with your help i can do that, problem return to doubleBackToExitPressedOnce with this code but now solved. thanks. – saeid mirzapour Jul 02 '15 at 18:24
@saeidmirzapour I wonder same "doubleBackToExitPressedOnce" post link i mentioned first and answer is ignored. Anyway thank you. – Anand Singh Jul 02 '15 at 18:27
gr8. problem solved :-) – Abhishek Jul 02 '15 at 18:31
@avi Excuse me, what is do "2000" in this code? – saeid mirzapour Jul 02 '15 at 18:45
oh, its for Toast, thanks – saeid mirzapour Jul 02 '15 at 18:48

score 2 · Answer 2 · edited May 23 '17 at 12:02

2

You have to write code inside onBackPressed() method. Try this code:

@Override 
public void onBackPressed() { 
    if(key == 1){
            key =0;
            finish();
        }else{
            Toast.makeText(getApplicationContext(), "press back Button again to exit", Toast.LENGTH_SHORT).show();
        key++;
        }
}

I recommend you to follow this post: Clicking the back button twice to exit an activity

edited May 23 '17 at 12:02

Community

1
1

answered Jul 02 '15 at 18:11

Anand Singh

5,672
2
23
33

Thanks Dear Anand, but this code, likewise I have problem. – saeid mirzapour Jul 02 '15 at 18:15
I hope it is solved now? – Anand Singh Jul 02 '15 at 18:17
make key global and initialize it with 0. – Anand Singh Jul 02 '15 at 18:20

press back again to exit

2 Answers2