GridView 设置其高度属性为 wrap_content

如果把GridView放到一个垂直方向滚动的布局中，设置其高度属性为 wrap_content ,则该GridView的高度只有一行内容，其他内容通过滚动来显示。 如果你想让该GridView的高度为所有行内容所占用的实际高度，则可以通过覆写GridView的 onMeasure 函数来修改布局参数：
Java代码

package com.jayway.components;

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

public class MyGridView extends GridView {
    public MyGridView(Context context) {
        super (context);
    }

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

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

    @Override
    protected void onMeasure( int widthMeasureSpec, int heightMeasureSpec) {
        int heightSpec;

        if (getLayoutParams().height == LayoutParams.WRAP_CONTENT) {
            // The great Android "hackatlon", the love, the magic.
            // The two leftmost bits in the height measure spec have
            // a special meaning, hence we can't use them to describe height.
            heightSpec = MeasureSpec.makeMeasureSpec(
                    Integer.MAX_VALUE >> 2 , MeasureSpec.AT_MOST);
        }
        else {
            // Any other height should be respected as is.
            heightSpec = heightMeasureSpec;
        }

        super .onMeasure(widthMeasureSpec, heightSpec);
    }
}

activity_main.xml

<? xml version = "1.0" encoding = "utf-8" ?>

< ScrollView
    xmlns:android = "http://schemas.android.com/apk/res/android"
    android:layout_width = "match_parent"
    android:layout_height = "match_parent" >

    < LinearLayout
        android:layout_width = "match_parent"
        android:layout_height = "wrap_content"
        android:orientation = "vertical" >

        <!-- Header One -->
    < TextView
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:focusable = "true"
            android:text = "Header 1" />

        <!-- Custom grid view holding the 'Group 1' items -->
        < com.jayway.components.MyGridView
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:numColumns = "3"
            android:stretchMode = "columnWidth"
            android:id = "@+id/grid_view_1" />

        <!-- Header 2 -->
        < TextView
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:text = "Header 2" />

        <!-- Custom grid view holding the 'Group 2' items -->
        < com.jayway.components.MyGridView
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:numColumns = "3"
            android:stretchMode = "columnWidth"
            android:id = "@+id/grid_view_2" />
    </ LinearLayout >
</ ScrollView >

MainActivity.java

package com.jayway.app;

import java.util.ArrayList;

import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.app.Activity;

import com.jayway.components.MyGridView;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super .onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ArrayList labels = new ArrayList();
        for ( int i = 0 ; i < 24 ; i++) {
            labels.add( "Item " + i);
        }

        ArrayAdapter adapter = new ArrayAdapter(
                this , android.R.layout.simple_list_item_1, labels);

        MyGridView grid1 = (MyGridView) findViewById(R.id.grid_view_1);
        grid1.setAdapter(adapter);

        MyGridView grid2 = (MyGridView) findViewById(R.id.grid_view_2);
        grid2.setAdapter(adapter);
    }
}

Read more: http://blog.chengyunfeng.com/?p=444#ixzz3lPTNs9KJ