Good sir, try this:
edittext.setFocusableInTouchMode(true);
edittext.requestFocus();
I’m not sure, but this might be required on some phones (some of the older devices):
final InputMethodManager inputMethodManager = (InputMethodManager) context
.getSystemService(Context.INPUT_METHOD_SERVICE);
inputMethodManager.showSoftInput(edittext, InputMethodManager.SHOW_IMPLICIT);