android中scrollview与listview共存，androidscrollview

android中scrollview与listview共存，androidscrollview

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.获取并设置ListView高度的方法

    public 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));  
        ((MarginLayoutParams)params).setMargins(10, 10, 10, 10);
        listView.setLayoutParams(params);  
    } 

2.XML布局

<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.[文件] Demo~183KB 下载(2952)

5.重写ListView解决item高度不一致的问题

public class MyListView extends ListView {

	public MyListView(Context context) {
		super(context);
	}

	public MyListView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public MyListView(Context context, AttributeSet attrs,
			int defStyle) {
		super(context, attrs, defStyle);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,  
	            MeasureSpec.AT_MOST);  
	    super.onMeasure(widthMeasureSpec, expandSpec);  
	}

}