安卓开发ScrollView嵌套ListView只显示一行

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 }

 

 给三个列表分别求出ListView完全显示需要的高度 便可以整体上下滑动三个列表了