王立平-Android中对图像进行Base64编码

1. // ------------------base64-------------------//
   
   public String bitmaptoString(Bitmap bitmap) {
   
   
   
   
   
   // 将Bitmap转换成字符串
   
   
   
   
   
   String string = null;
   
   
   
   
   
   ByteArrayOutputStream bStream = new ByteArrayOutputStream();
   
   
   
   
   
   bitmap.compress(CompressFormat.PNG, 100, bStream);
   
   
   
   
   
   byte[] bytes = bStream.toByteArray();
   
   
   
   
   
   string = Base64.encodeToString(bytes, Base64.DEFAULT);
   
   
   
   
   
   return string;
   
   
   
   
   
   }
   
   
   
   
   
   // --------------base64-----------------//
   
   public Bitmap stringtoBitmap(String string) {
   
   
   
   
   
   // 将字符串转换成Bitmap类型
   
   
   
   
   
   Bitmap bitmap = null;
   
   
   
   
   
   try {
   
   
   
   
   
   byte[] bitmapArray;
   
   
   
   
   
   bitmapArray = Base64.decode(string, Base64.DEFAULT);
   
   
   
   
   
   bitmap = BitmapFactory.decodeByteArray(bitmapArray, 0,
   
   
   
   
   
   bitmapArray.length);
   
   
   
   
   
   } catch (Exception e) {
   
   
   
   
   
   e.printStackTrace();
   
   
   
   
   
   }
   
   
   
   
   
   return bitmap;
   
   
   
   
   
   }