How to close an android application?

Question

There are many question regarding this topic but there is no clear answer. Although android\'s memory management is very solid, so many people believe that we shouldn\'t kil

Answer 1

@Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if(keyCode == KeyEvent.KEYCODE_BACK)
        {
            finish();
            return true;
        }
        else{
            return super.onKeyUp(keyCode, event);
        }
    }

use the above method in the very first activity that is launched on app start up