How to disable keycode button using public int instead of public boolean? I already search in this site such as "Disable back button in android" but all of them using public boolean or public void. 
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        squall leonhart
        
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                    But why public int? You didn't mention reason behind implementation. The methods which you are telling about boolean and void are abstract methods declared in Activity class. – Chintan Rathod Jan 15 '15 at 05:36