Overriding onBackPressed() does not disable back button

Question

I've an Activity that extends AppCompatActivity.

I tried to disable back button like this:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        onBackPressed();
    }
    return true;
}

@Override
public void onBackPressed() {
    Toast.makeText(this, "Back pressed", Toast.LENGTH_LONG).show();
}

I get the Toast which is good sign, but bad sign is, that it finishes activity and goes to the previous one (I'd like to avoid that).

why don't simply hide the button? – Levi Moreira Apr 03 '18 at 11:47 — Levi Moreira, Apr 03 '18 at 11:47

IntelliJ Amiya · Answer 1 · 2018-04-03T11:58:54.653

0

If you use onBackPressed then remove onKeyDown for now. Read onKeyDown() or onBackPressed().

FYI

Remove this method

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        onBackPressed();
    }
    return true;
}

Just use

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

edited Apr 03 '18 at 11:58

answered Apr 03 '18 at 11:50

IntelliJ Amiya

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1

aren't they doing that alread? – Levi Moreira Apr 03 '18 at 11:51
1

@LeviAlbuquerque I have edited answer. – IntelliJ Amiya Apr 03 '18 at 11:58

score 0 · Answer 2 · answered Apr 03 '18 at 11:55

Override the onBackPressed in the Activity:

@Override
    public void onBackPressed() {
        backButtonHandler();
        return;
    }

Write your code within the method called in onBackPressed()

 public void backButtonHandler() {
    Toast.makeText(this, "Back pressed", Toast.LENGTH_LONG).show();
}

Overriding onBackPressed() does not disable back button

2 Answers2