content: /*
   * Copyright (C) 2025 AlexMofer
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package io.github.alexmofer.android.support.utils;
  
  import android.view.View;
  
  import androidx.annotation.NonNull;
  import androidx.recyclerview.widget.RecyclerView;
  
  import java.util.function.IntConsumer;
  
  /**
   * RecyclerView 工具
   * Created by Alex on 2025/8/4.
   */
  public class RecyclerViewUtils {
  
      private RecyclerViewUtils() {
          //no instance
      }
  
      /**
       * 添加子项个数变更监听
       * @param view RecyclerView
       * @param listener 监听
       */
      public static void addChildrenCountChangedListener(RecyclerView view, IntConsumer listener) {
          view.addOnLayoutChangeListener((v, left, top, right, bottom,
                                          oldLeft, oldTop, oldRight, oldBottom)
                  -> listener.accept(view.getChildCount()));
          view.addOnChildAttachStateChangeListener(
                  new RecyclerView.OnChildAttachStateChangeListener() {
                      @Override
                      public void onChildViewAttachedToWindow(@NonNull View child) {
                          listener.accept(view.getChildCount());
                      }
  
                      @Override
                      public void onChildViewDetachedFromWindow(@NonNull View child) {
                          listener.accept(view.getChildCount());
                      }
                  });
      }
  }
  