SimpleAdapter介绍
SimpleAdapter是一个简单的适配器,可以将静态数据映射到XML文件中定义好的视图。
构造函数
- public SimpleAdapter (Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to)
参数
context SimpleAdapter关联的View的运行环境
data 一个Map组成的List。在列表中的每个条目对应列表中的一行,每一个map中应该包含所有在from参数中指定的键
resource 一个定义列表项的布局文件的资源ID。布局文件将至少应包含那些在to中定义了的ID
from 一个将被添加到Map映射上的键名
to 将绑定数据的视图的ID,跟from参数对应,这些应该全是TextView
ListView
Java类
- package com.app.test01;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.List;
- import android.app.Activity;
- import android.os.Bundle;
- import android.widget.ListView;
- import android.widget.SimpleAdapter;
- public class ListViewSimple extends Activity{
- ListView listView1;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_weixin);
- listView1 = (ListView) findViewById(R.id.listView1);
- String[] strings = {"img","title","info","time"};//Map的key集合数组
- int[] ids = {R.id.img,R.id.title,R.id.info,R.id.time};//对应布局文件的id
- SimpleAdapter simpleAdapter = new SimpleAdapter(this,
- getData(), R.layout.activity_weixin_item, strings, ids);
- listView1.setAdapter(simpleAdapter);//绑定适配器
- }
- // 初始化一个List
- private List<HashMap<String, Object>> getData() {
- // 新建一个集合类,用于存放多条数据
- ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();
- HashMap<String, Object> map = null;
- for (int i = 1; i <= 40; i++) {
- map = new HashMap<String, Object>();
- map.put("title", "人物" + i);
- map.put("time", "9月20日");
- map.put("info", "我通过了你的好友验证请求,现在我们可以开始对话啦");
- map.put("img", R.drawable.special_spring_head2);
- list.add(map);
- }
- return list;
- }
- }
主视图布局
- <?xml version="1.0" encoding="utf-8"?>
- <!-- 这是范例ListView的布局文件,出了ListView,还可以放置其他控件 -->
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="fill_parent"
- android:background="#fff"
- android:orientation="vertical" >
- <RelativeLayout
- android:id="@+id/relativeLayout1"
- android:layout_width="match_parent"
- android:layout_height="50dp"
- android:layout_alignParentLeft="true"
- android:layout_alignParentTop="true"
- android:background="#2B3439" >
- <TextView
- android:id="@+id/textView1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerHorizontal="true"
- android:layout_centerVertical="true"
- android:text="微信"
- android:textColor="#fff"
- android:textSize="22sp" />
- </RelativeLayout>
- <ListView
- android:id="@+id/listView1"
- android:layout_width="match_parent"
- android:paddingTop="60dp"
- android:paddingBottom="50dp"
- android:cacheColorHint="#00000000"
- android:layout_height="match_parent"
- android:stackFromBottom="true"
- android:transcriptMode="alwaysScroll" >
- </ListView>
- </RelativeLayout>
子视图布局
- <?xml version="1.0" encoding="utf-8"?>
- <!-- 这是列表项的布局文件,每一行长什么样子,修改这里 -->
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="60dp"
- android:layout_gravity="center_vertical"
- android:orientation="horizontal"
- android:padding="5dp" >
- <ImageView
- android:id="@+id/img"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_alignParentTop="true"
- android:layout_centerVertical="true"
- android:padding="5dp"
- android:src="@drawable/gong1" />
- <RelativeLayout
- android:id="@+id/relativeLayout1"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:layout_centerVertical="true"
- android:layout_marginLeft="5dp"
- android:layout_marginRight="70dp"
- android:layout_toRightOf="@+id/img" >
- <TextView
- android:id="@+id/title"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_alignParentTop="true"
- android:text="TextView"
- android:textColor="#000"
- android:textSize="18sp"/>
- <TextView
- android:id="@+id/info"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:layout_alignParentLeft="true"
- android:text="TextView"
- android:singleLine="true"
- android:ellipsize="end"
- android:textColor="#ccc"
- android:textSize="15sp" />
- </RelativeLayout>
- <TextView
- android:id="@+id/time"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignTop="@+id/relativeLayout1"
- android:layout_alignParentRight="true"
- android:layout_marginRight="10dp"
- android:text="TextView"
- android:textColor="#ccc"
- android:textSize="15sp"/>
- </RelativeLayout>
效果图
GridView
Java类
- package com.app.test01;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.Map;
- import android.app.Activity;
- import android.os.Bundle;
- import android.widget.GridView;
- import android.widget.SimpleAdapter;
- public class GridViewSimple extends Activity {
- private GridView gridView1;
- private int[] ids = { R.drawable.gong1, R.drawable.gong2, R.drawable.gong3,
- R.drawable.gong4, R.drawable.gong5, R.drawable.gong6,
- R.drawable.gong7, R.drawable.gong8, R.drawable.gong9,
- R.drawable.gong1, R.drawable.gong2, R.drawable.gong3,
- R.drawable.gong4, R.drawable.gong5, R.drawable.gong6,
- R.drawable.gong7, R.drawable.gong8, R.drawable.gong9 };
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.gridview);
- gridView1 = (GridView) findViewById(R.id.gridView1);
- ArrayList<Map<String, Object>> arrayList = new ArrayList<Map<String, Object>>();
- for (int i = 0; i < ids.length; i++) {
- Map<String, Object> map = new HashMap<String, Object>();
- map.put("image", ids[i]);
- arrayList.add(map);
- }
- SimpleAdapter simpleAdapter = new SimpleAdapter(this, arrayList,
- R.layout.gridview_item, new java.lang.String[] { "image" },
- new int[] { R.id.imageView1 });
- gridView1.setAdapter(simpleAdapter);
- }
- }
主视图布局
- <?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" >
- <GridView
- android:id="@+id/gridView1"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:numColumns="3" >
- </GridView>
- </LinearLayout>
子视图布局
- <?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"
- android:gravity="center"
- android:paddingTop="10dp"
- android:paddingBottom="10dp">
- <ImageView
- android:id="@+id/imageView1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/gong1" />
- <TextView
- android:id="@+id/textView1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="TextView" />
- </LinearLayout>