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PiledroMurcia
Asked: 2020-04-11 00:16:52 +0800 CST 2020-04-11 00:16:52 +0800 CST

Notice to close app

  • 772

I am working with an app in AndroidStudio. What code could I implement so that when the back is called to exit the app, it tells me if I want to exit it or not?

android

1 Answers

  1. Best Answer

    Basically you have to override the method onBackPressedof the Activity:

    private int backpress = 0;

@Override
public void onBackPressed(){
    backpress++;    // La primera vez es 1 (aviso), la segunda es 2 (finish)

   if (backpress > 1) { 
        this.finish();
    } else {
        Toast.makeText(getApplicationContext(), "Pulse de nuevo para salir.", Toast.LENGTH_SHORT).show();
    }
}

    You can reset the variable backpressso that it asks for "press again" after X time by adding the following code inside the method onBackPressed:

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

        @Override
        public void run() {
            backpress = 0;                       
        }
    }, 3000);  // Resetea a los 3 segundos
    • 3