How to handle back button in activity

Issue

How to handle a back button in an activity? I have some buttons. If I click one of the buttons, it's redirecting to the buttons which I required. It's working fine but when I press back button it gets finished.

How to solve this problem? I have only one activity for all those buttons.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) 
{
    if ((keyCode == KeyEvent.KEYCODE_BACK)) 
    {
        return false; //I have tried here true also
    }
    return super.onKeyDown(keyCode, event);
}

I have used above code to handle back button but it's not working. When I press back button its struck there itself.

Solution

You can handle it like this:

for API level 5 and greater

@Override
public void onBackPressed() {
    // your code.
}

older than API 5

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

    return super.onKeyDown(keyCode, event);
}

Answered By - Saurabh Pareek