Android学习之复杂列表显示

MyListViewDemo.java:

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.ListView;
import android.widget.SimpleAdapter;

public class MyListViewDemo extends Activity {
  private int pic[] = new int[] { R.drawable.pic_oracle,
      R.drawable.pic_javase, R.drawable.pic_javaweb,
      R.drawable.pic_javaee, R.drawable.pic_android, R.drawable.pic_game };
  private String data[][] = new String[][] { { "Oracle数据库", "张三" },
      { "Java SE基础课程", "张三" }, { "Java WEB综合开发", "张三" },
      { "Java EE高级开发", "张三" }, { "Android嵌入式开发", "张三" },
      { "Java 游戏开发", "张三" } };

  private ListView datalist = null; // 定义ListView组件
  private List<Map<String, String>> list = new ArrayList<Map<String, String>>(); // 定义显示的内容包装
  private SimpleAdapter simpleAdapter = null; // 进行数据的转换操作

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.setContentView(R.layout.main);
    this.datalist = (ListView) super.findViewById(R.id.datalist); // 取得组件
    for (int x = 0; x < this.data.length; x++) {
      Map<String, String> map = new HashMap<String, String>(); // 定义Map集合，保存每一行数据
      map.put("pic", String.valueOf(this.pic[x])); // 与data_list.xml中的TextView组加匹配
      map.put("title", this.data[x][0]); // 与data_list.xml中的TextView组加匹配
      map.put("author", this.data[x][1]); // 与data_list.xml中的TextView组加匹配
      map.put("type", "免费");
      map.put("score", String.valueOf(R.drawable.start_05));
      this.list.add(map); // 保存了所有的数据行
    } 
    this.simpleAdapter = new SimpleAdapter(this, this.list,
        R.layout.data_list, new String[] { "pic", "title", "author",
            "type", "score" } // Map中的key的名称
        , new int[] { R.id.pic, R.id.title, R.id.author, R.id.type,
            R.id.score }); // 是data_list.xml中定义的组件的资源ID
    this.datalist.setAdapter(this.simpleAdapter);
  }
}

data_list.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="horizontal"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
  <ImageView
    android:id="@+id/pic"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:padding="3px"/>
  <LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="190px"
    android:layout_height="wrap_content"
    android:gravity="left">
    <TextView 
      android:id="@+id/title"
      android:textSize="16px"
      android:padding="3px"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
    <TextView 
      android:id="@+id/author"
      android:padding="3px"
      android:textSize="10px"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
  </LinearLayout>
  <LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="200px"
    android:layout_height="wrap_content"
    android:gravity="left">
    <TextView 
      android:id="@+id/type"
      android:padding="3px"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
    <ImageView 
      android:id="@+id/score"
      android:padding="3px"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
  </LinearLayout>
</LinearLayout>

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    android:textSize="25px"
    android:gravity="center_horizontal"
    android:text="java开发视频列表" />
  <ListView
    android:id="@+id/datalist" 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
</LinearLayout>