Android实用工具类——ListView动态显示条目数目

动态加载ListView的高度：

package com.example.epnc.utils;

import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.ListView;

/**
* Created by TCL on 2016/9/18.
*/
public class ListViewUtils {

/**
* 根据listView内部item的高度动态决定大小
*
* @param listView 要动态的listView
* @param count 几条之后滚动
*/
public static void setListViewHeightBasedOnChildren(ListView listView, int count) {

ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
ViewGroup.LayoutParams params = listView.getLayoutParams();
if (listAdapter.getCount() < count) {
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
//listItem.notify();
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
} else {
View listItem = listAdapter.getView(0, null, listView);
listItem.measure(0, 0);
params.height = listItem.getMeasuredHeight() * count + listView.getDividerHeight() * count;
}
listView.setLayoutParams(params);
}
}



非常实用的工具类。