com.hadoopz.MyDroidLib.util.ListViewUtil Maven / Gradle / Ivy
/*
* Copyright 2018 jw362j.
*
* 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 com.hadoopz.MyDroidLib.util;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.view.View;
import android.view.ViewGroup;
/**
*
* @author jw362j
*/
public class ListViewUtil {
/**
* 定义函数动态控制listView的高度
* 在每次listView的adapter发生变化后，要调用setListViewHeightBasedOnChildren(listView)更新界面
*
* @param listView
*/
public static void setListViewHeightBasedOnChildren(ListView listView) {
//获取listview的适配器
ListAdapter listAdapter = listView.getAdapter(); //item的高度
if (listAdapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0); //计算子项View 的宽高 //统计所有子项的总高度
totalHeight += DisplayUtil.dip2px(listView.getContext(), listItem.getMeasuredHeight()) + listView.getDividerHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight;
listView.setLayoutParams(params);
}
}