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);  
        }  
    }  


    package com.example.e