public class Utility { 
public static void setListViewHeightBasedOnChildren(ListView listView) { 
//获取ListView对应的Adapter 
ListAdapter listAdapter = listView.getAdapter();  
if (listAdapter == null) { 
// pre-condition 
return; 
} 
 
int totalHeight = 0; 
for (int i = 0, len = listAdapter.getCount(); i < len; i++) { //listAdapter.getCount()返回数据项的数目 
View listItem = listAdapter.getView(i, null, listView); 
listItem.measure(0, 0); //计算子项View 的宽高 
totalHeight += listItem.getMeasuredHeight(); //统计所有子项的总高度 
} 
 
ViewGroup.LayoutParams params = listView.getLayoutParams(); 
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1)); 
//listView.getDividerHeight()获取子项间分隔符占用的高度 
//params.height最后得到整个ListView完整显示需要的高度 
listView.setLayoutParams(params); 
} 
} 

public class MyListView extends ListView { 
 
  public MyListView(Context context) { 
    // TODO Auto-generated method stub 
    super(context); 
  } 
 
  public MyListView(Context context, AttributeSet attrs) { 
    // TODO Auto-generated method stub 
    super(context, attrs); 
  } 
 
  public MyListView(Context context, AttributeSet attrs, int defStyle) { 
    // TODO Auto-generated method stub 
    super(context, attrs, defStyle); 
  } 
 
  @Override 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    // TODO Auto-generated method stub 
    int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, 
        MeasureSpec.AT_MOST); 
    super.onMeasure(widthMeasureSpec, expandSpec); 
  } 
} 

/** 
 *自定义gridview，解决ScrollView中嵌套gridview显示不正常的问题（1行） 
 */ 
public class MyGridView extends GridView{ 
   public MyGridView(Context context, AttributeSet attrs) {  
      super(context, attrs);  
    }  
    
    public MyGridView(Context context) {  
      super(context);  
    }  
    
    public MyGridView(Context context, AttributeSet attrs, int defStyle) {  
      super(context, attrs, defStyle);  
    }  
    
    @Override  
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  
    
      int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,  
          MeasureSpec.AT_MOST);  
      super.onMeasure(widthMeasureSpec, expandSpec);  
    }  
}