Keyboard Utils Android , This Hide , addKeyboardVisibilityListener and show Keyboard

Keyboard Android

import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

public class KeyboardUtils {

    public static void hideKeyboard(Activity activity) {
        View view = activity.findViewById(android.R.id.content);
        if (view != null) {
            InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
        }
    }

    public static void showKeyboard(Activity activity) {
        InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
    }

    public static void addKeyboardVisibilityListener(View rootLayout, OnKeyboardVisibiltyListener onKeyboardVisibiltyListener) {
        rootLayout.getViewTreeObserver().addOnGlobalLayoutListener(() -> {
            Rect r = new Rect();
            rootLayout.getWindowVisibleDisplayFrame(r);
            int screenHeight = rootLayout.getRootView().getHeight();

            // r.bottom is the position above soft keypad or device button.
            // if keypad is shown, the r.bottom is smaller than that before.
            int keypadHeight = screenHeight - r.bottom;

            boolean isVisible = keypadHeight > screenHeight * 0.15; // 0.15 ratio is perhaps enough to determine keypad height.
            onKeyboardVisibiltyListener.onVisibilityChange(isVisible);
        });
    }

    public interface OnKeyboardVisibiltyListener {
        void onVisibilityChange(boolean isVisible);
    }
}