ListView、GridView与ScrollView嵌套冲突解决

在ScrollView中嵌套一个ListView发现ListView只显示一行多一点的数据，这肯定是ScrollView与ListView冲突导致的，网上看了些资料有些解决方案并不能解决这个冲突，最后在stackoverflow上看到了一个解决方法，最后采用了他这种解决方案，原文是全英文的，简单的翻译下，本人英文不是太好翻译不好的地方还希望大家能指点一二。阅读原文
怎样让ScrollView里面ListView或者GridView的高度得到扩大。
我们都知道嵌套在ScrollView里面的ListView或者GridView会使他们滑动变得困难并且不能高度不能扩大。Androdi也没有提供内置的API来处理这个问题，所以我们需要基于这两点做一些处理。
这个解决方法在stackoverflow Neil Traft的回答。
ExpandableHeightListView

package net.londatiga.android.widget;

import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.ListView;
import android.content.Context;

public class ExpandableHeightListView extends ListView {

boolean expanded = false;

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

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

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

    public boolean isExpanded()
    {
        return expanded;
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        // HACK! TAKE THAT ANDROID!
        if (isExpanded())
        {
            // Calculate entire height by providing a very large height hint.
            // But do not use the highest 2 bits of this integer; those are
            // reserved for the MeasureSpec mode.
            int expandSpec = MeasureSpec.makeMeasureSpec(
                    Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
            super.onMeasure(widthMeasureSpec, expandSpec);

            ViewGroup.LayoutParams params = getLayoutParams();
            params.height = getMeasuredHeight();
        }
        else
        {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

    public void setExpanded(boolean expanded)
    {
        this.expanded = expanded;
    }

ExpandableHeightGridView

package net.londatiga.android.widget;

import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.GridView;
import android.content.Context;

public class ExpandableHeightGridView extends GridView {

 boolean expanded = false;

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

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

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

 public boolean isExpanded()
 {
 return expanded;
 }

 @Override
 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
 {
 // HACK! TAKE THAT ANDROID!
 if (isExpanded())
 {
 // Calculate entire height by providing a very large height hint.
 // But do not use the highest 2 bits of this integer; those are
 // reserved for the MeasureSpec mode.
 int expandSpec = MeasureSpec.makeMeasureSpec(
 Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
 super.onMeasure(widthMeasureSpec, expandSpec);

 ViewGroup.LayoutParams params = getLayoutParams();
 params.height = getMeasuredHeight();
 }
 else
 {
 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 }
 }

 public void setExpanded(boolean expanded)
 {
 this.expanded = expanded;
 }
}

使用方法：

//ListView
ExpandableHeightListView listView = new ExpandableHeightListView(this);

listView.setAdapter(adapter);
listView.setExpanded(true);

//GridView
ExpandableHeightGridView gridView = new ExpandableHeightGridView(this);

gridView.setNumColumns(4);
gridView.setAdapter(adapter);
gridView.setExpanded(true);

正如你看到的，使嵌套在ScrollViewView里面的ListView和GridVew的高度得到扩大，仅仅只需要调用setExapanded（true）方法就行。