Android 常用資料配接器SimpleAdapter

標籤：

在《Android 常用資料配接器ArrayAdapter》中介紹了ArrayAdapter資料配接器。但是存在一個缺陷，那就是條目的表徵圖都固定相同，要顯示每個條目的表徵圖都不相同，那麼使用SimpleAdapter

建立項目後，在layout檔案夾下建立list_item.xml檔案，接著編輯布局，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="wrap_content"    android:gravity="center_vertical"    android:orientation="horizontal" >    <ImageView        android:id="@+id/iv"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

activity_main.xml中的代碼如下：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <ListView        android:id="@+id/lv"        android:layout_width="fill_parent"        android:layout_height="fill_parent" /></RelativeLayout>

從……\sdk\platforms\android-18\data\res\drawable-hdpi中隨便拷貝幾個圖片，放到drawable-hdpi檔案夾中

代碼如下：

package com.wuyudong.simpleadapter;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.ListView;import android.widget.SimpleAdapter;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ListView lv = (ListView) findViewById(R.id.lv);        List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();        Map<String, Object> map1 = new HashMap<String, Object>();        map1.put("nametext", "我是第1個功能");        map1.put("iconid", R.drawable.btn_radio_off_disabled_focused_holo_dark);        Map<String, Object> map2 = new HashMap<String, Object>();        map2.put("nametext", "我是第2個功能");        map2.put("iconid", R.drawable.btn_radio_off_disabled_focused_holo_light);        Map<String, Object> map3 = new HashMap<String, Object>();        map3.put("nametext", "我是第3個功能");        map3.put("iconid", R.drawable.btn_radio_off_focused_holo_dark);        Map<String, Object> map4 = new HashMap<String, Object>();        map4.put("nametext", "我是第4個功能");        map4.put("iconid", R.drawable.btn_radio_off_focused_holo_light);        Map<String, Object> map5 = new HashMap<String, Object>();        map5.put("nametext", "我是第5個功能");        map5.put("iconid", R.drawable.btn_radio_off_holo);        data.add(map1);        data.add(map2);        data.add(map3);        data.add(map4);        data.add(map5);        lv.setAdapter(new SimpleAdapter(this, data, R.layout.list_item,                new String[] { "nametext", "iconid" }, new int[]{R.id.tv, R.id.iv}));    }}

運行後的效果如下：

Android 常用資料配接器SimpleAdapter