how to disable back button in android

Question

i am making swap application... i want to disable back button. so i use this code... and passed intent in to it..

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        // do something on back.
        return true;
    }

    return super.onKeyDown(keyCode, event);
}

but while running when i press back button on emulator it updates activity but when i repress back button it switch to the home page of an emulator.. please suggest is their any other method

You can override either of these method `dispatchKeyEvent`, `onBackPressed`, `onKeyDown`. Refer to [this answer](https://stackoverflow.com/a/44714357/6521116) for more. — LF00, Jun 23 '17 at 07:17

score 64 · Accepted Answer · edited May 06 '16 at 08:24

64

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

edited May 06 '16 at 08:24

Bikash

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answered Apr 15 '11 at 07:06

Saurabh Pareek

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i just applied @Override public void onBackPressed() { // do nothing. return; } and by applying intent now i can switch to the page where i want – Sam Apr 15 '11 at 09:34
2

Has this really been up for more than two years with "do not return true" from a `void` method? Come on...there are several more complete and correct answers here. – CodeClown42 Nov 28 '13 at 13:00

score 16 · Answer 2 · edited Apr 15 '19 at 08:57

16

 @Override
 public void onBackPressed() {

    //super.onBackPressed();
    if(SOME_CONDITION_TO_CHECK){
        //THIS BLOCK WILL NOT DO ANYTHING AND WOULD DISABLE BACK BUTTON             
    }else{
       super.onBackPressed();
       //THIS BLOCK WILL BE CALLED IF ABOVE COND IS FALSE, AND WOULD ENABLE BACK BUTTON
    }   

 }

edited Apr 15 '19 at 08:57

Rohit Singh

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answered Feb 11 '13 at 11:05

Ali Ashraf

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score 6 · Answer 3 · answered Apr 15 '11 at 07:04

6

Did you try onBackPressed() ?

@Override
public void onBackPressed() {
       // Do as you please
}

answered Apr 15 '11 at 07:04

Codemonkey

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score 3 · Answer 4 · answered Aug 27 '11 at 17:07

This is my solution it works using Android 2.2

override onBackPressed() ...

public void onBackPressed() {
   // check if you are in the right mode 
   if (getCurrentState() == FORM_STATE_BROWSE ) {
       // ok do default back action
       super.onBackPressed();
   }

   // exit skipping "onBackPressed()"
   return;
}

score 1 · Answer 5 · edited Apr 15 '19 at 08:59

1

You must add return in order for this to successfully work on all devices, my Note-3 & HTC still go back if I don't include return!

  @Override
  public void onBackPressed() {
        return;
  }

edited Apr 15 '19 at 08:59

Rohit Singh

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answered Mar 16 '15 at 16:13

Petro

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That seems very strange because Java can see no difference between no return and return in this case. Return just exits the method doing nothing. – JohnyTex Apr 18 '16 at 15:55
Just posting what happened, I don't have a technical reason. – Petro Apr 19 '16 at 01:12

score 0 · Answer 6 · answered Mar 04 '13 at 05:46

Like if you want to move on some activity by pressing back button,override this method in your activity

 @Override
    public void onBackPressed() {
        // do nothing.
        Intent intent = new Intent(SocialPlugIns.this, MainActivity.class);
        Log.i("Hello", "This is Coomon Log");
        startActivity(intent);
           return;
    }

score 0 · Answer 7 · edited Apr 12 '16 at 04:57

0

You have to override onBackPressed() function. Below I am giving a way:

   @Override
    public void onBackPressed() {
       //make some alert for the user
    }

edited Apr 12 '16 at 04:57

thor

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answered Apr 12 '16 at 04:35

Akhter Al Amin

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how to disable back button in android

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