安卓开发ScrollView嵌套ListView只显示一行

浏览数：32 / 时间：2015年06月11日

在用列表控件做一个“更多功能”的界面的时候

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 
 3 android:id="@+id/ScrollView"
 4  android:layout_width="fill_parent" 
 5 android:layout_height="wrap_content" 
 6 android:scrollbars="vertical"> 
 7 
 8 <LinearLayout
 9     android:layout_width="match_parent"
10     android:layout_height="fill_parent"
11     android:orientation="vertical" >
12 
13     <ListView
14         android:id="@+id/list_more_top"       
15         android:layout_width="match_parent"
16         android:layout_height="fill_parent" >
17     </ListView>
18     <ImageView
19         android:id="@+id/imageView1"
20         android:layout_width="fill_parent"
21         android:layout_height="wrap_content"
22         android:src="@drawable/divider" />
23     <ListView
24         android:id="@+id/list_more_center"       
25         android:layout_width="match_parent"
26         android:layout_height="wrap_content" >
27     </ListView>
28     <ImageView
29         android:id="@+id/imageView2"
30         android:layout_width="fill_parent"
31         android:layout_height="wrap_content"
32         android:src="@drawable/divider" />
33     <ListView
34         android:id="@+id/list_more_buttom"       
35         android:layout_width="match_parent"
36         android:layout_height="wrap_content" >
37     </ListView>
38 </LinearLayout>
39 </ScrollView>

原本用ScrollView嵌套ListView 但是在测试的时候 ListView列表只显示一列！这不是我希望得到的

我希望的是可以整个拖动三个列表

于是上网查询发现的问题所在

在ScrollView中嵌套ListView空间，无法正确的计算ListView的大小，导致只显示列表第一项

故可以通过代码，根据当前的ListView的列表项计算列表的尺寸。

  1 package songsong;
  2 
  3 import com.example.xqx_tea.R;
  4 
  5 import android.app.Activity;
  6 import android.app.AlertDialog;
  7 import android.app.Notification.Builder;
  8 import android.content.DialogInterface;
  9 import android.content.Intent;
 10 import android.os.Bundle;
 11 import android.app.AlertDialog;
 12 import android.view.View;
 13 import android.view.ViewGroup;
 14 import android.view.Window;
 15 import android.widget.AdapterView;
 16 import android.widget.AdapterView.OnItemClickListener;
 17 import android.widget.ArrayAdapter;
 18 import android.widget.ListAdapter;
 19 import android.widget.ListView;
 20 
 21 public class MenuMore extends Activity{
 22     ListView list_more_top;
 23     ListView list_more_center;
 24     ListView list_more_buttom;
 25     
 26     @Override
 27     protected void onCreate(Bundle savedInstanceState) {
 28         // TODO Auto-generated method stub
 29         super.onCreate(savedInstanceState);
 30         requestWindowFeature(Window.FEATURE_NO_TITLE);
 31     setContentView(R.layout.menu_more);
 32 
 33     ListView list_more_top = (ListView) findViewById(R.id.list_more_top);
 34     ListView list_more_center = (ListView) findViewById(R.id.list_more_center);
 35     ListView list_more_buttom = (ListView) findViewById(R.id.list_more_buttom);
 36     String[] adapterData_top = new String[] { "饮茶时刻表", "小茶叶大妙用","中国十大名茶"};
 37     list_more_top.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,adapterData_top));
 38     
 39     String[] adapterData_center = new String[] { "使用帮助", "意见反馈","软件介绍"};
 40     list_more_center.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,adapterData_center));   
 41     
 42     String[] adapterData_buttom = new String[] { "检查更新", "退出软件"};
 43     list_more_buttom.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,adapterData_buttom));   
 44 
 45     setListViewHeightBasedOnChildren(list_more_top); 
 46     setListViewHeightBasedOnChildren(list_more_center);
 47     setListViewHeightBasedOnChildren(list_more_buttom);
 48 
 49     
 50     
 51     //为列表视图中选中的项添加响应事件
 52     list_more_top.setOnItemClickListener(new OnItemClickListener() {
 53 
 54         @Override
 55         public void onItemClick(AdapterView<?> parent, View arg1, int pos,
 56                 long id) {
 57             // TODO Auto-generated method stub
 58             
 59         }
 60     });
 61     
 62   //为列表视图中选中的项添加响应事件
 63     list_more_center.setOnItemClickListener(new OnItemClickListener() {
 64 
 65         @Override
 66         public void onItemClick(AdapterView<?> parent, View arg1, int pos,
 67                 long id) {
 68             // TODO Auto-generated method stub
 69             
 70         }
 71     });
 72     
 73   //为列表视图中选中的项添加响应事件
 74     list_more_buttom.setOnItemClickListener(new OnItemClickListener() {
 75 
 76         @Override
 77         public void onItemClick(AdapterView<?> parent, View arg1, int pos,
 78                 long id) {
 79             
 80             // TODO Auto-generated method stub
 81             if(1 == id)
 82                 {
 83                     finish();
 84                 }
 85             if(0 == id)
 86                 {
 87                 Intent intent = new Intent();
 88                 intent.setClass(MenuMore.this, More_submitdeal.class);
 89                 startActivity(intent);
 90                 }
 91             
 92         }
 93     });
 94     }
 95     
 96     public void setListViewHeightBasedOnChildren(ListView listView) {   
 97                 // 获取ListView对应的Adapter   
 98                 ListAdapter listAdapter = listView.getAdapter();   
 99                 if (listAdapter == null) {   
100                     return;   
101                 }   
102            
103                 int totalHeight = 0;   
104                 for (int i = 0, len = listAdapter.getCount(); i < len; i++) {   
105                     // listAdapter.getCount()返回数据项的数目   
106                     View listItem = listAdapter.getView(i, null, listView);   
107                     // 计算子项View 的宽高   
108                     listItem.measure(0, 0);    
109                     // 统计所有子项的总高度   
110                     totalHeight += listItem.getMeasuredHeight();    
111                 }   
112           
113                ViewGroup.LayoutParams params = listView.getLayoutParams();   
114                 params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));   
115                 // listView.getDividerHeight()获取子项间分隔符占用的高度   
116                 // params.height最后得到整个ListView完整显示需要的高度   
117                 listView.setLayoutParams(params);   
118             }   
119 
120 
121 }