AndroidScrollView与ListView,GridView共存冲突解决方案

我们在真实项目中通常会遇到ListView或者GridView嵌套在ScrollView中问题。但是做的时候会发现，一旦两者进行嵌套，即会发生冲突。得不到我们希望的效果。由于ListView和GridView本身都继承于ScrollView，一旦在ScrollView中嵌套ScrollView，那么里面的ScrollView高度计算就会出现问题。我们也就无法得到想要的效果。下面进入正题，我们将分别讨论ScrollView中嵌套ListView和FGridView的情况：

核心解决方案： 重写ListView或者GridView的OnMesure 方法：

@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); 
} 

 一、ScrollView中嵌套ListView

新建MyListView类，继承ListView，并重写onMeasure()方法

 
public class MyListView extends ListView{ 
 
    public MyListView (Context context) { 
        super(context); 
        // TODO Auto-generated constructor stub 
    } 
    public MyListView(Context context, AttributeSet attrs) { 
        super(context, attrs); 
        // TODO Auto-generated constructor stub 
    } 
    public MyListView(Context context, AttributeSet attrs, int defStyle) { 
        super(context, attrs, defStyle); 
        // TODO Auto-generated constructor stub 
    } 
    @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); 
    } 
 
} 

二、ScrollView中嵌套GridView的解决方案。

新建MyGridView类，继承GridView，并重写onMeasure()方法

import android.content.Context; 
import android.util.AttributeSet; 
import android.widget.GridView; 
 
public class MyGridView extends GridView{ 
 
    public MyGridView(Context context, AttributeSet attrs, int defStyle) { 
        super(context, attrs, defStyle); 
        // TODO Auto-generated constructor stub 
    } 
    public MyGridView(Context context, AttributeSet attrs) { 
        super(context, attrs); 
        // TODO Auto-generated constructor stub 
    } 
    public MyGridView(Context context) { 
        super(context); 
        // TODO Auto-generated constructor stub 
    } 
    @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);  
 
    } 
}