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>


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> 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 };

	@Override
	protected 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>();
		for (int i = 0; i < names.length; i++) {
			Map map = new HashMap();
			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);

	}

}