android中scrollview与listview共存

来源：互联网发布：300英雄淘宝四周年编辑：程序博客网时间：2024/06/05 11:16

ScrollView与ListView共存会存在滚动的问题，并且ListView只显示一个半Item。当ListView的高度设定一定的值时，ListView同样地会显示对应的高度的Item。因此我们可以计算出这个ListView的总高度，再将它设置到ListView中，那么之前的滚动，高度问题也就不存在了。

1. [代码]获取并设置ListView高度的方法

[全屏查看所有代码]

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
publicvoid setListViewHeightBasedOnChildren(ListView listView) { 
    ListAdapter listAdapter = listView.getAdapter();   
    if(listAdapter == null) {  
        return; 
    } 
 
    inttotalHeight = 0; 
    for(inti = 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)); 
    ((MarginLayoutParams)params).setMargins(10,10,10,10);
    listView.setLayoutParams(params); 
}

2. [代码]XML布局

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
<ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:fadingEdge = "none"
        android:background="#FFF4F4F4"
        xmlns:android="http://schemas.android.com/apk/res/android"
        >
   <LinearLayout
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:background="#fff4f4f4"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <ListView
        android:id="@+id/moreItemsListView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:cacheColorHint="#FFF4F4F4"
        android:dividerHeight="0.0dip"
        android:fadingEdge="none"
        />
   </LinearLayout>
</ScrollView>

3. [图片] scrollview_listview.jpg

4. [代码]重写ListView解决item高度不一致的问题

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
publicclass MyListView extendsListView {
 
    publicMyListView(Context context) {
        super(context);
    }
 
    publicMyListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
 
    publicMyListView(Context context, AttributeSet attrs,
            intdefStyle) {
        super(context, attrs, defStyle);
    }
 
    @Override
    protectedvoid onMeasure(intwidthMeasureSpec, intheightMeasureSpec) {
        intexpandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, 
                MeasureSpec.AT_MOST); 
        super.onMeasure(widthMeasureSpec, expandSpec);  
    }
 
}

0 0