随笔。

/MainActivity.java


package cn.bzu.listview03;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;


//第一步：extends Activity
public class MainActivity extends Activity {
// 第二步：定义数据集合
List<Map<String, ?>> data;
    ListView listView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
data = getData();
// 第三步：创建SimpleAdapter绑定数据
SimpleAdapter adapter = new SimpleAdapter(this, data,
R.layout.list_item, new String[] { "photo", "name", "publish",
"content" }, new int[] { R.id.photo, R.id.name,
R.id.publish, R.id.content });
listView=(ListView) this.findViewById(R.id.listView);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new ListClickHandler());


}

//第四步：添加单击事件
private class ListClickHandler implements OnItemClickListener{


public void onItemClick(AdapterView<?> adapterView, View view, int position,
long id) {
Map<String, String> item=(Map<String, String>) data.get(position);
Toast.makeText(MainActivity.this, item.get("name").toString(), Toast.LENGTH_LONG).show();
}

}


private List<Map<String, ?>> getData() {
List<Map<String, ?>> data = new ArrayList<Map<String, ?>>();
Map<String, Object> item = new HashMap<String, Object>();
item.put("photo", R.drawable.p1);
item.put("name", "想想");
item.put("publish", "1分钟前");
item.put("content", "正在学习AndroidListView,嘎嘎嘎嘎嘎嘎嘎嘎嘎");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p2);
item.put("name", "嘻嘻");
item.put("publish", "10分钟前");
item.put("content", "今天真高兴啊！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p3);
item.put("name", "米粒");
item.put("publish", "5分钟前");
item.put("content", "今天糗大了！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p4);
item.put("name", "丽丽");
item.put("publish", "1分钟前");
item.put("content", "今天遇到一件好玩的事情！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p5);
item.put("name", "西西");
item.put("publish", "2分钟前");
item.put("content", "今天天气真好哈！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p6);
item.put("name", "露露");
item.put("publish", "10分钟前");
item.put("content", "今天真高兴啊！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p7);
item.put("name", "美美");
item.put("publish", "2分钟前");
item.put("content", "今天真高兴啊！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p8);
item.put("name", "晕晕");
item.put("publish", "5分钟前");
item.put("content", "今天真高兴啊！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p9);
item.put("name", "嘻嘻");
item.put("publish", "4分钟前");
item.put("content", "今天真高兴啊！");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p10);
item.put("name", "嘻嘻");
item.put("publish", "1分钟前");
item.put("content", "今天真高兴啊！");
data.add(item);
return data;
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}


}








/activity_main.xml




<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >


    <ListView
        android:id="@+id/listView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />


</LinearLayout>














/list_item.xml




<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >


    <!-- 左边图片 -->
    <ImageView
        android:id="@+id/photo"
        android:padding="10dp"
        android:layout_width="48dp"
        android:layout_height="48dp" />
    <!-- 右边布局 -->


    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >


        <!-- 上边布局 -->


        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >


            <!-- 发布人 -->


            <TextView
                android:id="@+id/name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />


            <!-- 发布时间 -->


            <TextView
                android:id="@+id/publish"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:gravity="right" />
        </LinearLayout>
        <!-- 下边发布内容 -->


        <TextView
            android:id="@+id/content"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>


</LinearLayout>