按下后退按钮时如何退出应用程序

Question

This is a small question but I'm finding very hard to solve this. I have multiple activities. For example AB and C. When app is launched A is opened and on click of button will redirect me to activity B and then from B on click of another button will take me to C. On Back pressed will now bring me back to B and again on Back button is pressed will take me to A which is main Activity.

Now if I press back button, instead the app should exit...it creates loop between B and A and never exit the app.

I already used the following method

Method 1: use of this.finish onBackPressed which didn't help

Method 2: use android:nohistory = true in manifest

But If I do so then from C activity it will directly take me to A which I don't want.

Method 2. Use of

      Intent intent = new Intent(Intent.ACTION_MAIN);
        //to clear all old opened activities 
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
        finish();

when I use this then everytime this opens up in my device

Please anyone help.

This is my code in Mainactivity now

 @Override
    public void onBackPressed() {
           finish();
            super.onBackPressed();
        }

But also it don't work and it creates loop between A and B Activity.

Answer 1

Your code (in MainActivity) is incorrect , put finish() after super.onBackPressed()

it must be :

@Override
public void onBackPressed() {
    super.onBackPressed();
    finishAffinity(); // or finish();
}