Question

I have developed an android application in which some “OK” button (soft key) is present in the layout and it is used to handle some event .I want to map its functionality to hard key(like home key ) in my mobile during application run. I also want to know how to differentiate between single click and double click on an button. How to know the time gap between two button clicks and can we change that time period to handle double click.

Answer 1

You should not intercept the functionality of home button. as it is the only way that the user can come out of the app at any stage. You can override this function to intercept the functionality of back button:

 public void onBackPressed{
//do something here
}

EDIT:

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyLongPress(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        return super.onKeyLongPress(keyCode, event);
    }