安卓--網格視圖（GridView）執行個體

標籤：安卓   gridview   

main.xml代碼如下：

<?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代碼如下：

<?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代碼 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); // 生命週期方法super.setContentView(R.layout.main); // 設定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();//反射機制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：

安卓--網格視圖（GridView）執行個體