Spinner 之 使用SimpleAdapter 填充数据

适用场景    图文混排,图片来自本地


数据源    List<Map<String,Object>>


步骤:
  
1, 控件,  得到控件并且初始化


2, 得到数据源


3, 得到适配器


4, 为控件设置适配器




/**
* context 上下文对象 
* data 数据源
* resource 每个Item的布局页面
* from   String[]  数据源中key的数组
* to  int[]     布局页面中id的数组
*/
SimpleAdapter adapter = new SimpleAdapter(
this, 
data, 
R.layout.spinner_item, 
new String[]{"icon","name","age"}, 

new int[]{R.id.icon,R.id.name,R.id.age});

package com.qfday04_simpleadapter;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.SimpleAdapter;import android.widget.Spinner;public class MainActivity extends Activity {private Spinner spinner;private List<Map<String, Object>> data;private int[] images = { R.drawable.img_29, R.drawable.img_30,R.drawable.img_31, R.drawable.img_32, R.drawable.img_33,R.drawable.img_42, R.drawable.img_43, R.drawable.img_44 };private String[] names = { "小丽", "小翠", "小方", "小圆", "小黑", "小白", "小明", "小华" };private int[] ages = { 18, 21, 22, 32, 31, 18, 20, 25 };@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 1, 得到控件初始化spinner = (Spinner) findViewById(R.id.spinner_id);// 2, 得到数据源data = new ArrayList<Map<String, Object>>();for (int i = 0; i < names.length; i++) {Map<String, Object> map = new HashMap<String, Object>();map.put("icon", images[i]);map.put("name", names[i]);map.put("age", ages[i]);data.add(map);}// 3, 定义适配器/** * context 上下文对象 data 数据源 resource 每个Item的布局页面 from String[] 数据源中key的数组 * to int[] 布局页面中id的数组 */SimpleAdapter adapter = new SimpleAdapter(this, data,R.layout.spinner_item, new String[] { "icon", "name", "age" },new int[] { R.id.icon, R.id.name, R.id.age });// 4, 为控件设置适配器spinner.setAdapter(adapter);}}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"     android:padding="10dp"    >            <ImageView         android:id="@+id/icon"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/img_29"        android:layout_marginRight="10dp"        />        <TextView         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/name"        android:layout_toRightOf="@id/icon"        android:text="姓名"        />        <TextView         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/age"        android:layout_below="@id/name"        android:layout_marginTop="10dp"        android:text="年龄"        android:layout_alignLeft="@id/name"        /></RelativeLayout>