how to get focus when checked chekbox?

I have set setFocusable(false) in my edit text. But when i checked checkbox i want to get focus in my edittext. below is example.

cbIsGap.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) {

            edittext1.setFocusable(true);
            edittext1.setClickable(true);

        }else {


            edittext1.setFocusable(true);
            edittext1.setClickable(true);

        }
    }
});

I am trying above example but i am not getting focus when i checked checkbox