Android數據庫存儲和檢索

Question

嗨，我是Android新手。可以某人描述如何存儲圖像到Android數據庫&檢索它嗎？

Answer 1

看看這個教程...

http://www.tutorialforandroid.com/2009/10/how-to-insert-image-data-to-sqlite.html

，你可以使用此代碼：
用於存儲圖像：

Map<String, byte[]> hh = new HashMap<String, byte[]>(); 

String hi = "http://i.stack.imgur.com/TLjuP.jpg"; 
byte[] logoImagedata = getLogoImage(hi);  

hh.put("img",logoImagedata); 

爲retriving：

byte[] imageByteArray = hh.get("img"); 

ByteArrayInputStream imageStream = new ByteArrayInputStream(imageByteArray); 
Bitmap theImage= BitmapFactory.decodeStream(imageStream); 

和getLogoImage：

private byte[] getLogoImage(String url){ 
     try { 
       URL imageUrl = new URL(url); 
       URLConnection ucon = imageUrl.openConnection(); 

       InputStream is = ucon.getInputStream(); 
       BufferedInputStream bis = new BufferedInputStream(is); 

       ByteArrayBuffer baf = new ByteArrayBuffer(500); 
       int current = 0; 
       while ((current = bis.read()) != -1) { 
         baf.append((byte) current); 
       } 

       return baf.toByteArray(); 
     } catch (Exception e) { 
       Log.d("ImageManager", "Error: " + e.toString()); 
       return null; 
     } 

    } 

我希望這對你有所幫助。