處理方法一:
1、當Item的佈局是LinerarLayout時:(此方法不推薦)
private void showAllListView()
{
if (lotteryStyleAdapter != null)
{
int totalHeight = 0;
for (int i = 0; i < lotteryStyleAdapter.getCount(); i++)
{
View listItem = lotteryStyleAdapter.getView(i, null, listview);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listview.getLayoutParams();
params.height = totalHeight
+ (listview.getDividerHeight() * (lotteryStyleAdapter
.getCount() - 1));
listview.setLayoutParams(params);
}
}
2、當Item佈局是其他佈局(包含LinearLayout):(推薦使用)
2.1 重寫ListView:
package com.test.lottery.view;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;
/**
* 自定義的ListView 用於ScrollView嵌套ListView時 ListView展示不全
*/
public class AllListView extends ListView
{
public AllListView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int mExpandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, mExpandSpec);
}
}
2.2、書寫佈局文件是用自定義的AllListView代替ListView使用
方法二:
ScrollView中嵌套ListView,使得listview上下滑動卡頓現象
最近項目中發現會出現內存溢出展開listview導致 現在換了一種方式如下:
使用方式在adapter更新數據後設置
mBusinessMoreRecommendAdapter.updateBusinessMoreRecommentData(mHitilistEntities); SetListviewItemHeigtUtil.setListViewHeightBasedOnChildren(lvBusinessRecommend);
/**ScrollView嵌套ListView只顯示一行 * 動態改變ListView的高度 * Created by jiangbing on 2016/3/9. */ public class SetListviewItemHeigtUtil { public static void setListViewHeightBasedOnChildren(ListView listView) { //獲取ListView對應的Adapter ListAdapter listAdapter = listView.getAdapter(); if (listAdapter == null) { // pre-condition return; } int totalHeight = 0; for (int i = 0, len = listAdapter.getCount(); i < len; i++) { //listAdapter.getCount()返回數據項的數目 View listItem = listAdapter.getView(i, null, listView); listItem.measure(0, 0); //計算子項View 的寬高 totalHeight += listItem.getMeasuredHeight(); //統計所有子項的總高度 } ViewGroup.LayoutParams params = listView.getLayoutParams(); params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1)); //listView.getDividerHeight()獲取子項間分隔符佔用的高度 //params.height最後得到整個ListView完整顯示需要的高度 listView.setLayoutParams(params); } }