ScrollView嵌套ListView/GridView显示问题

　　ScrollView嵌套ListView/GridView的显示问题可以说是安卓开发者都会遇到的问题，同时处理起来也比较麻烦，最近也遇到了这种问题，在这整理一下做个记录。

1、对于ListView最常用的就是动态的根据Adapter来计算列表的高度，在设置完列表之后调用一下对应的计算方法即可：

/**
     * 动态设置ListView的高度
     * 
     * @param listView
     */
    public static void setListViewHeightBasedOnChildren(ListView listView)
    {
        if (listView == null)
            return;
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null)
        {
            // pre-condition
            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));
        listView.setLayoutParams(params);
    }

该方法是目前比较流行的解决ListView与ScrollView冲突的方案

 

2、重写ListView与GridView

重写ListView：

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);  
    }  
}

重写GridView

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);
    }