android listview 总结

看到了非常不错的listview 的一篇文章。

虽然还是比较基础的。

 

现将链接贴上：

http://www.cnblogs.com/skyseraph/archive/2012/02/21/2361103.html

http://www.cnblogs.com/zhengbeibei/archive/2013/05/14/3078805.html

 

下午的时候android listview simpleadapter都不知哪出现问题，一直实现不了。不过最终解决了，simpleadapter只需要三个文件。

 

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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true" >

    </ListView>

</RelativeLayout>

MainActivity.java

package com.example.listview;

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.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {
    private ListView lv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv = (ListView)findViewById(R.id.listView);
        SimpleAdapter adapter = new SimpleAdapter(this, getData(), R.layout.activity_simple_adapter, new String[] { "title",  "img" }, new int[] { R.id.title, R.id.img });  
        lv.setAdapter(adapter);  
    }

     private List<Map<String, Object>> getData() {  
            //map.put(参数名字,参数值)  
            List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  
            Map<String, Object> map = new HashMap<String, Object>();  
            map.put("title", "摩托罗拉");  
            map.put("img", R.drawable.ic_launcher);  
            list.add(map);  
              
            map = new HashMap<String, Object>();  
            map.put("title", "诺基亚");  
            map.put("img", R.drawable.ic_launcher);  
            list.add(map);  
              
            map = new HashMap<String, Object>();  
            map.put("title", "三星");  
            map.put("img", R.drawable.ic_launcher);  
            list.add(map);  
            return list;  
            }    

}

activity_simple_adapter.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".SimpleAdapterActivity" >

    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="5dp" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#ffffff"
        android:textSize="20sp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</LinearLayout>

 

 

MainActivty.java

中主要的就是getData，我比较欣赏这种写法。