HashMap、ArrayList、SimpleAdapter的综合使用

来源：互联网发布：她在睡梦中知乎编辑：程序博客网时间：2024/06/03 14:35

今天是我在深圳的第三天上班，做安卓研发，用到了个以后将常要用到的东西，记录下来（里面巧妙运用了循环语句，我觉得不错）。

java代码：

package com.example.xsgj.activity.menu;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.ListActivity;import android.os.Bundle;import android.widget.SimpleAdapter;public class JXCActivity extends Activity {private GridView _gridView1;protected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_menu);_gridView1 = (GridView) findViewById(R.id.menu);// 生成动态数组，并且转入数据ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>();for (int i = 0; i < 2; i++) {HashMap<String, Object> map = new HashMap<String, Object>();if (i == 0) {map.put("ItemImage", R.drawable.dianmian);map.put("ItemText", "店面");} else if (i == 1) {map.put("ItemImage", R.drawable.dingdan);map.put("ItemText", "订单");} lstImageItem.add(map);}// 生成适配器的ImageItem <====> 动态数组的元素，两者一一对应SimpleAdapter saImageItems = new SimpleAdapter(this, lstImageItem,// 数据来源R.layout.layout_gridview_item,// night_item的XML实现// 动态数组与ImageItem对应的子项new String[] { "ItemImage", "ItemText" },// ImageItem的XML文件里面的一个ImageView,一个TextView IDnew int[] { R.id.imageView_ItemImage, R.id.textView_ItemText });// 添加并且显示_gridView1.setAdapter(saImageItems);}}

acitivity_menu.xml:

<?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" >    <include layout="@layout/header" >    </include>    <GridView        android:id="@+id/menu"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_gravity="center_horizontal"        android:numColumns="2" >    </GridView></LinearLayout>