how to disable back button in android [duplicate]

This question already has answers here: Disable back button in android 开发者_运维问答 (18 answers) Closed 6 years ago.

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

---

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

---

 @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
    }   

 }

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Did you try onBackPressed() ?

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

---

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;
}

---

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;
  }

---

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;
    }

---

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

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