如何将图像转换为android中的base64二进制值？

Question

public static String encodeToBase64(Bitmap image, Bitmap.CompressFormat compressFormat, int quality) 
{ 
    ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream(); 
    image.compress(compressFormat, quality, byteArrayOS); 
    return Base64.encodeToString(byteArrayOS.toByteArray(), Base64.DEFAULT); 
} 

上述代码是图像转换成BASE64 串，但我想图像转换成BASE64 二进制和Base64二进制的转换输出将看起来像“[255,216,255,224,0,16,74 ，70,73,70,0,1,1,1,0,96,0,96,0,0,255,219,0,67,0,8,6,6,7,6,5,8,7,7 ，7,9,9,8,10,12,20,13,12,11,11,12,25,18,19,15,20,29,26,31,30,29,26,28,28 ，32,36,46,39,32,34,44,35,28,28,40,55,41,44,48,49,52,52,52,31,39,57,61,56,50 ，60,46,51,52,50,255,219,0,67,1,9,9,9,12,11,12,24,13,13,24,50,33,28,33,50,50,50 ，50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50，........... ......，253,246,255,0,190,141,20,80,2,249,142,57,222,223,153,160,200,231,146,237,159,173,20,80,1,230,63,247,219,254,250,52,155,223,251,237,255,0,125,26,40,16 0,4,103,102,108,177,44,79,82,78,73,162,138,40,3,255,217]“ ..任何人都可以帮助我吗？提前致谢。

Answer 1

在你的第一步你就编码为Base64。获取二进制数据是将其解码回来。 :)你可以像下面这样做

byte[] byteArr = Base64.decode("Pass BASE64 String here", Base64.DEFAULT); 

Answer 2

看到这个答案

Java - Convert image to Base64

在这个后用户在文件中写入数据，然后在这里使用Apache下议院IOUtils从那里读它：

Base64.encode(FileUtils.readFileToByteArray(file)); 

还阵列的限制也被指定来捕获编码的字节数组。

byte[] byteArray = new byte[102400]; 
base64String = Base64.encode(byteArray); 

Answer 3

Bitmap to Base64 (Java) 
private String bitmapToBase64(Bitmap bitmap) 
{ 
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream); 
byte[] byteArray = byteArrayOutputStream .toByteArray(); 
return Base64.encodeToString(byteArray, Base64.DEFAULT); 
}