Android 用Internet下載圖片至 ImageView

這個很容易
沒什麼好解說的


1) 宣告

   ImageView img;  
   @Override  
   public void onCreate(Bundle savedInstanceState) {  
     super.onCreate(savedInstanceState);  
     setContentView(R.layout.main);  
     Bitmap bitmap = null;  
     try {  
          bitmap = DownloadImage(  
            "http://upload.wikimedia.org/wikipedia/commons/4/46/Flag_of_the_Republic_of_China.JPG");  
     } catch (IOException e) {  
          e.printStackTrace();  
     }  
     img = (ImageView) findViewById(R.id.image);  
     img.setImageBitmap(bitmap);  
   }  

2) method 建立連線，並下載圖片

 private Bitmap DownloadImage(String myurl) throws IOException  
   {      
     Bitmap bitmap = null;  
     InputStream in = null;   
     URL url = new URL(myurl);  
     HttpURLConnection con = (HttpURLConnection) url.openConnection();  
     try {           
       in = new BufferedInputStream(con.getInputStream());  
       bitmap = BitmapFactory.decodeStream(in);  
       in.close();  
     } catch (IOException e1) {  
       e1.printStackTrace();  
     }  
     return bitmap;          
   }  

3) 執行結果