how to disable back button for particular activity

Question

I'm developing an Android app in which first screen is Login screen. after successful log-in, Home screen appears. But the problem is when I press Back button, it goes to login screen again. I want to disable the back button while I am on home screen and display an alert box asking

are you sure you want to exit

I have searched many examples, but didn't find any perfect solution I have tried using public void onBackPressed() {} method, but don't know what to implement. My min SDK version is 15.

Does this answer your question? [Disable back button in android](https://stackoverflow.com/questions/4779954/disable-back-button-in-android) — VahidHoseini, Aug 12 '20 at 11:16

Orhan Obut · Answer 1 · 2014-06-23T07:00:34.590

4

If your actual desire is to prevent user to go back to login activity, you can use other options as well :

finish() login activity after you call home activity. So you won't need to ignore back press.
put noHistory="true" in Android Manifest for login screen, when the user goes to home screen, they won't be able to come back with back button again.

and last

override onBackPressed() method in home activity. But as I said if you just want to prevent user to go back, you shouldn't override this method. They should be able to press back button and quit the app.

public void onBackPressed(){
}

edited Jun 23 '14 at 07:00

answered Jun 23 '14 at 06:38

Orhan Obut

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Then please mark this answer as solved with the green check on the left. – alex Jun 23 '14 at 08:45

Abdullah AlHazmy · Accepted Answer · 2014-06-23T08:22:10.743

In your activity just override onBackPressed()

  @Override
    public void onBackPressed() {
      AlertDialog diaBox = AskOption();
      diaBox.show();
    }

 private AlertDialog AskOption()
 {
    AlertDialog myQuittingDialogBox =new AlertDialog.Builder(this) 
        .setTitle("Exit") 
        .setMessage("Are you sure you want to exit?") 
        .setIcon(R.drawable.delete)
        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) { 
            finish();
            }   
        })
        .setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        })
        .create();
        return myQuittingDialogBox;

    }

score 2 · Answer 3 · answered Jun 23 '14 at 06:38

You need to override the onBackPressed() and remove the super.onBackPressed() line

@Override
    public void onBackPressed() {
        super.onBackPressed(); //  remove this line
    }

Meantime if you do login and navigate to home screen it is a best practice that you finish the login screen and navigate to home screen. So the user wont see the login screen again.. Let me tell you a sample scenario

Splash Screen (Finishes this activity and move to login)
Login Screen
If login succeds then finish login screen and navigate to home screen. So if user presses back you can ask for an alert whether you want to quit from app or not.
If user launches app again it will repeat the same process.

score 1 · Answer 4 · answered Jun 23 '14 at 06:34

1

Just leave the OnBackPressed() method empty. Does it for me

answered Jun 23 '14 at 06:34

shujj

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score 0 · Answer 5 · edited Jun 23 '14 at 06:41

0

Override onBackPressed() and remove line super.onBackPressed();

@Override
public void onBackPressed() {

}

Know when you press back it won't go back.

edited Jun 23 '14 at 06:41

alex

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answered Jun 23 '14 at 06:37

Prasanthi

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score 0 · Answer 6 · answered Jun 23 '14 at 06:37

0

use onbackpressed()

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

i hope this will help you..

answered Jun 23 '14 at 06:37

prabhakaran

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score 0 · Answer 7 · answered Jun 23 '14 at 06:38

0

Leave OnBackPressed() empty and, finish () login activity when you navigate from login to home page

answered Jun 23 '14 at 06:38

Reena

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score 0 · Answer 8 · answered Jun 23 '14 at 06:40

0

its very simple,just override the backpress and remove super calling like:

@Override
public void onBackPressed(){

}

leave this method blank and you will get what you want.

answered Jun 23 '14 at 06:40

Pankaj Arora

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score 0 · Answer 9 · answered Jun 23 '14 at 06:40

0

@Override
public void onBackPressed() {
// do nothing.
}

Do not return true.Just check the condition.

answered Jun 23 '14 at 06:40

Siddharth_Vyas

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how to disable back button for particular activity

9 Answers9