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 };
@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<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>