main.xml代码如下：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <GridView android:id="@+id/myGridView" android:layout_width="fill_parent" android:layout_height="wrap_content" android:numColumns="3" android:stretchMode="columnWidth" > </GridView></LinearLayout>
grid_layout.xml代码如下：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:scaleType="center" android:padding="3px"/></LinearLayout>
.java代码 如下：
package org.lxh.demo;import java.lang.reflect.Field;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.widget.GridView;import android.widget.SimpleAdapter;public class Hello extends Activity { private List<Map<String, Integer>> list = new ArrayList<Map<String, Integer>>(); private SimpleAdapter simpleAdapter = null; private GridView gridView = null; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 生命周期方法 super.setContentView(R.layout.main); // 设置要使用的布局管理器 this.initAdapter(); this.gridView = (GridView) super.findViewById(R.id.myGridView); this.gridView.setAdapter(this.simpleAdapter); } private void initAdapter() { Field[] fields = R.drawable.class.getDeclaredFields();//反射机制 for (int x = 0; x < fields.length; x++) { if (fields[x].getName().startsWith("png_")) { Map<String, Integer> map = new HashMap<String, Integer>(); try { map.put("img", fields[x].getInt(R.drawable.class)); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } this.list.add(map); } this.simpleAdapter = new SimpleAdapter(this, this.list, R.layout.grid_layout, new String[] { "img" }, new int[] { R.id.img }); } }}效果如下：
