Android Bitmap与String互转（转）

 /**
      * 图片转成string
      *
      * @param bitmap
      * @return
      */
     public static String convertIconToString(Bitmap bitmap)
     {
         ByteArrayOutputStream baos = new ByteArrayOutputStream();// outputstream
         bitmap.compress(CompressFormat.PNG, 100, baos);
         byte[] appicon = baos.toByteArray();// 转为byte数组
         return Base64.encodeToString(appicon, Base64.DEFAULT);

     }

     /**
      * string转成bitmap
      *
      * @param st
      */
     public static Bitmap convertStringToIcon(String st)
     {
         // OutputStream out;
         Bitmap bitmap = null;
         try
         {
             // out = new FileOutputStream("/sdcard/aa.jpg");
             byte[] bitmapArray;
             bitmapArray = Base64.decode(st, Base64.DEFAULT);
             bitmap =
                     BitmapFactory.decodeByteArray(bitmapArray, 0,
                             bitmapArray.length);
             // bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
             return bitmap;
         }
         catch (Exception e)
         {
             return null;
         }
     }