android用ImageView顯示網絡圖片

1、權限配置

<!--  訪問internet權限  -->

<uses-permission android:name="android.permission.INTERNET"/> 

2、 從網絡獲取圖片

 
          package cn.jgw.service; 
          
 
          
 
          import java.io.InputStream; 
          
 
          import java.net.HttpURLConnection; 
          
 
          import java.net.URL; 
          
 
          
 
          import cn.jgw.utils.StreamTool; 
          
 
          
 
          public  
          class ImageService { 
          
     
          /** 
          
     * 獲取網絡圖片的數據
     *  
          @param 
           path 網絡圖片路徑
     *  
          @return 
          
      
          */ 
          
     
          public  
          static  
          byte[] getImage(String path)  
          throws Exception{ 
          
        URL url =  
          new URL(path); 
          
        HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
          // 
          基於HTTP協議連接對象 
          
        conn.setConnectTimeout(5000); 
          
        conn.setRequestMethod("GET"); 
          
         
          if(conn.getResponseCode() == 200){ 
          
            InputStream inStream = conn.getInputStream(); 
          
             
          return StreamTool.read(inStream); 
          
        } 
          
         
          return  
          null; 
          
    } 
          
} 
         

 

package cn.jgw.utils;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

public class StreamTool {

/**

* 讀取流中的數據

* @param inStream

* @return

* @throws Exception

*/

public static byte[] read(InputStream inStream) throws Exception{

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = 0;

while( (len = inStream.read(buffer)) != -1){

outStream.write(buffer, 0, len);

}

inStream.close();

return outStream.toByteArray();

}

}

 

 3、在ImageView中顯示圖片

 
          try{ 
          
                 
          byte[] data = ImageService.getImage(path); 
          
                Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); 
          
                imageView.setImageBitmap(bitmap); 
          // 
          顯示圖片 
          
            } 
          catch (Exception e) { 
          
                e.printStackTrace(); 
          
                Toast.makeText(getApplicationContext(), R.string.error, 1).show(); 
         

}