Android学习10——ListView

页面布置：

activity_main.xml：

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


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


</RelativeLayout>

list_item.xml：

<?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="horizontal" >


    <!-- 左边是图片 -->


    <ImageView
        android:id="@+id/photo"
        android:layout_width="48dp"
        android:layout_height="48dp" />
    <!-- 右边是个布局 -->


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


        <!-- 上面是个布局 -->


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


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


            <TextView
                android:textSize="10dp"
                android:id="@+id/publish"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:gravity="right" />
        </LinearLayout>
        <!-- 发布内容 -->


        <TextView
            android:textSize="10dp"
            android:id="@+id/content"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>


</LinearLayout>

主要代码：

MainActivity.java：

package com.zzw.listview_01;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


import android.os.Bundle;
import android.provider.ContactsContract.Data;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;


import android.support.v4.app.NavUtils;


public class MainActivity extends Activity {
private ListView listView;
private List<Map<String, ?>> data;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) this.findViewById(R.id.listview);
data = getData();
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.setAdapter(adapter);
listView.setOnItemClickListener(new ListViewHandler());
}
private class ListViewHandler implements OnItemClickListener{

@Override
public void onItemClick(AdapterView<?> listview, View view, int postion,long id){
Map<String,?> item=data.get(postion);
Toast.makeText(getApplicationContext(), 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", "嘿嘿");
item.put("publish", "一分钟前");
item.put("content", "好好学习Android");
data.add(item);
item = new HashMap<String, Object>();
item.put("photo", R.drawable.p2);
item.put("name", "嘻嘻");
item.put("publish", "三分钟前");
item.put("content", "好好学习");
data.add(item);
return data;
}


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


}

运行程序效果图如下：