ListView中混合使用Drawable文件夹资源和网络资源

1、listview.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="vertical"
  android:background="#FFFFFF">
 
  <ImageView
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:id="@+id/image"
   android:src="@drawable/icon_1"
   android:visibility="gone"></ImageView>
 
  <ListView
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:id="@+id/listview"></ListView>
 
</LinearLayout>

2、listitem.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="horizontal">
 
  <ImageView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="bottom" 
      android:id="@+id/img" 
  /> 
  <TextView android:id="@+id/listtext"  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content" 
       android:textColor="#000000"  
       android:textSize="18dip" ></TextView> 
</LinearLayout>

3、

package moile.drawable.main;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class ListViewActivity extends Activity {
 private  ImageView imageView ;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);  
  setContentView(R.layout.listview);
  imageView = (ImageView)this.findViewById(R.id.image); //放置该ImageView是为了能够设置ListView中图片的大小
  
     byte[] data = null;//1、使用Bitmap的方式
  try {
   data = this.getImage("http://online.sccnn.com/icon/1202/01.png");
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }//得到图片的二进制数据
      Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);//生成位图   

  ListView listView = (ListView)this.findViewById(R.id.listview);
  
  List<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();  
  HashMap<String, Object> map = new HashMap<String, Object>(); 
        map.put("ItemImg",R.drawable.icon); 
        map.put("ItemTitle", "第一行"); 
        list.add(map); 
          
        map = new HashMap<String, Object>(); 
        map.put("ItemImg",R.drawable.icon_1); 
        map.put("ItemTitle", "第二行"); 
        list.add(map); 
        
        map = new HashMap<String, Object>();  //1、使用Bitmap的方式
        map.put("ItemImg",bitmap); 
        map.put("ItemTitle", "我的Test"); 
        list.add(map);
        
        SimpleAdapter m = new SimpleAdapter(this,list,R.layout.listitem,
           new String[]{"ItemImg","ItemTitle"},
           new int[]{R.id.img,R.id.listtext});
        
        listView.setAdapter(m);
        
        m.setViewBinder(new SimpleAdapter.ViewBinder() {   
   @Override
   public boolean setViewValue(View view, Object data,
     String textRepresentation) {
    // TODO Auto-generated method stub
    if(view instanceof ImageView  && data instanceof Bitmap){    //1、使用Bitmap的方式
      ImageView iv = (ImageView) view;   
      Bitmap bitmap = (Bitmap) data;     
      Bitmap b = Bitmap.createScaledBitmap(bitmap, imageView.getDrawable().getIntrinsicWidth(), imageView.getDrawable().getIntrinsicHeight(), true);//创建一个可以缩放的位图对象
      iv.setImageBitmap(b);
      return true;   
    }else   
      return false;  
    }
  });
 }
  
  public byte[] getImage(String path) throws Exception{
    URL url = new URL(path);
    //get //post
    HttpURLConnection conn = (HttpURLConnection)url.openConnection();
    conn.setRequestMethod("GET");
    conn.setConnectTimeout(5*1000);
    InputStream inStream = conn.getInputStream();
   
    ByteArrayOutputStream outStream = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    int len = 0;
    while( (len = inStream.read(buffer)) !=-1 ){
     outStream.write(buffer, 0, len);
    }
    byte[] data = outStream.toByteArray();//图片的二进制数据
    outStream.close();
    inStream.close();
    return data;

  }

}