ListView动态控制条数,总是显示不全,现在在网上找到解决方案,与大家分享
大概思路,重写ListView类的onMeasure(...)方法,xml布局使用自定义的HstListView类,代码如下:
package com.hst.taxmobile.common; import android.content.Context; import android.util.AttributeSet; import android.widget.ListView; public class HstListView extends ListView { public HstListView(Context context) { // TODO Auto-generated method stub super(context); } public HstListView(Context context, AttributeSet attrs) { // TODO Auto-generated method stub super(context, attrs); } public HstListView(Context context, AttributeSet attrs, int defStyle) { // TODO Auto-generated method stub super(context, attrs, defStyle); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // TODO Auto-generated method stub int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, expandSpec); } }
页面设置:
<com.hst.taxmobile.common.HstListView android:id="@+id/pmxx_listview" android:layout_width="match_parent" android:layout_height="wrap_content" android:divider="#eeeeee" android:dividerHeight="10dp" android:background="@drawable/shapes_rect_round" />
上面这种是通用的,有些可以使用以下方法计算出当前ListView的长度:
/* * 根据listView的child数量设置listView的高度 */ public static void setListViewHeightBasedOnChildren(ListView listView) { ListAdapter listAdapter = listView.getAdapter(); 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); totalHeight += listItem.getMeasuredHeight(); } ViewGroup.LayoutParams params = listView.getLayoutParams(); params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1)); listView.setLayoutParams(params); }