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How do I convert a byte array to Base64 in Java?


How do I convert a byte array to Base64 in Java?

By : Gergo Barta
Date : October 28 2020, 04:55 PM
it fixes the issue Okay, I know how to do it in C#. , Java 8+
Encode or decode byte arrays:
code :


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How to convert image into byte array and byte array to base64 String in android?

How to convert image into byte array and byte array to base64 String in android?


By : joaowo
Date : March 29 2020, 07:55 AM
This might help you Can someone tell me the code to convert image into byte array and that byte array into base64 string. i write the below code not getting proper result . , Try this:
code :
// convert from bitmap to byte array
public byte[] getBytesFromBitmap(Bitmap bitmap) {
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bitmap.compress(CompressFormat.JPEG, 70, stream);
    return stream.toByteArray();
}

// get the base 64 string
String imgString = Base64.encodeToString(getBytesFromBitmap(someImg), 
                       Base64.NO_WRAP);
convert base64 string to byte array like C# method Convert.FromBase64String

convert base64 string to byte array like C# method Convert.FromBase64String


By : Yhuri Kyllian
Date : March 29 2020, 07:55 AM
With these it helps As Martin R mention in his comment I tried options from other topic and I was doing conversion byte array bad way. This is correct method in swift:
code :
class func base64ToByteArray(base64String: String) -> [UInt8]? {
      if let nsdata = NSData(base64EncodedString: base64String, options: nil) {
          var bytes = [UInt8](count: nsdata.length, repeatedValue: 0)
          nsdata.getBytes(&bytes)
          return bytes
      }
      return nil // Invalid input
}
if let nsdata = NSData(base64EncodedString: base64String, options: NSDataBase64DecodingOptions.IgnoreUnknownCharacters) {
...
Trying to convert image to Base64 string in javascript and trying to convert to byte array in c#, gives Invalid characte

Trying to convert image to Base64 string in javascript and trying to convert to byte array in c#, gives Invalid characte


By : user2384941
Date : March 29 2020, 07:55 AM
To fix this issue When using the readAsDataURL method, the result contains a Data URL which is prefixed with the data: schema.
From MDN web docs:
Convert base64 encoded string to java byte array

Convert base64 encoded string to java byte array


By : user3771987
Date : March 29 2020, 07:55 AM
wish of those help You don't have to worry about byte signedness because base64 encoded data never uses more than 6 bits in each byte (that's why it's called base 64, because you only use 64 characters which is 6 bits, to represent part of a data byte).
If your concern is the resulting data (3 data bytes for every 4 base64 characters), don't worry about that, either. An unsigned byte 255 in C# is the same as the signed byte -1 in Java.
Convert string to base64 byte array in swift and java give different value

Convert string to base64 byte array in swift and java give different value


By : tony
Date : March 29 2020, 07:55 AM
it fixes the issue Finally solved:
This is due to signed and unsigned integer, meaning unsigned vs signed (so 0 to 255 and -127 to 128). Here, we need to convert the UInt8 array to Int8 array and therefore the problem will be solved.
code :
let intArray = data1.map { Int8(bitPattern: $0) }
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