prevent keyboard disappear

KeyboardEditText

//The goal is to make a custom lock screen that the user must enter a pass code 
//or leave the application.
//When the user taps the "keyboard down" button the keyboard does not disappear.
//https://stackoverflow.com/questions/13591012/implementing-onkeypreimeint-keycode-keyevent-event-in-fragment

public class CustomKonashaEditText extends AppCompatEditText {

    public CustomKonashaEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        return true;
    }
}