Convert image to base64 string android

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

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 .

result im getting is

base64 string is

5 Answers 5

I wrote the following code to convert an image from sdcard to a Base64 encoded string to send as a JSON object.And it works great:

They have wrapped most stuff need to solve your problem, one of the tests looks like this:

here is another solution.

Try this simple solution to convert file to base64 string

Not the answer you’re looking for? Browse other questions tagged android image bytearray or ask your own question.

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Android Bitmap to Base64 String

How do I convert a large Bitmap (photo taken with the phone’s camera) to a Base64 String?

7 Answers 7

use following method to convert bitmap to byte array:

to encode base64 from byte array use following method

I have fast solution. Just create a file ImageUtil.java

The problem with jeet’s answer is that you load all bytes of the image into a byte array, which will likely crash the app in low-end devices. Instead, I would first write the image to a file and read it using Apache’s Base64InputStream class. Then you can create the Base64 string directly from the InputStream of that file. It will look like this:

As you can see, the above solution works directly with streams instead, avoiding the need to load all the bytes into a variable, therefore making the memory footprint much lower and less likely to crash in low-end devices. There is still the problem that putting the Base64 string itself into a String variable is not a good idea, because, again, it might cause OutOfMemory errors. But at least we have cut the memory consumption by half by eliminating the byte array.

If you want to skip the write-to-a-file step, you have to convert the OutputStream to an InputStream, which is not so straightforward to do (you must use PipedInputStream but that is a little more complex as the two streams must always be in different threads).

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How to convert image into base64 string android?

Can someone tell me the code to convert image into base64 string. i write the below code not getting proper result .

Result im getting is not in proper format it ends with 3 dots .

Byte array im getting ends with 3 dots .

and base64 string im getting also ends with 3 dots which is not proper

but when i convert image from my drawable resource im getting proper base64 string

can any buddy tell me what im doing in above code Thanks in advance

3 Answers 3

I dare say that dots on the end are just placeholder for display of values too long for display / printout as byte array. There is nothing wrong with your base64 encoding code, but why are you recording JPEG? Just read your file in byte array ( not in one gulp but chunked, I would choose buffer size to be multiple of 4 ), convert it on the fly and write it into output stream.

PS: reading while files are in android is bad practice, as memory is very constrained — you will have bad performance.

Here is the sample code but I’m too lazy to compile or debug it:

This is not the most optimal solution though, as arraycopy potentially copies data ( but this has to be done on last chunk )

Also check where do you see you base64. If debug — it will be cut!

Ok. Try my code to decode image into MPx you want. Here is 1 megapixel:

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How can I convert an image into Base64 string using JavaScript?

I need to convert my image to a Base64 string so that I can send my image to a server.

Is there any JavaScript file for this? Else, how can I convert it?

17 Answers 17

There are multiple approaches you can choose from:

1. Approach: FileReader

Load the image as blob via XMLHttpRequest and use the FileReader API (readAsDataURL()) to convert it to a dataURL:

This code example could also be implemented using the WHATWG fetch API:

These approaches:

• lack in browser support

• have better compression
• work for other file types as well

Browser Support:

2. Approach: Canvas

Load the image into an Image-Object, paint it to a nontainted canvas and convert the canvas back to a dataURL.

Supported input formats:

image/png , image/jpeg , image/jpg , image/gif , image/bmp , image/tiff , image/x-icon , image/svg+xml , image/webp , image/xxx

Supported output formats:

image/png , image/jpeg , image/webp (chrome)

Browser Support:

Internet Explorer 10 (Internet Explorer 10 just works with same origin images)

3. Approach: Images from the local file system

If you want to convert images from the users file system you need to take a different approach. Use the FileReader API:

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Encode and decode bitmap object in base64 string in Android

I want to encode and decode Bitmap object in string base64 . I use the Android API10,

I have tried, with no success, to use a method in this form to encode a Bitmap .

4 Answers 4

Hope this will help you

(if you are referencing URI to construct bitmap) OR

(if you are referencing drawable to construct bitmap)

For Decoding Logic will be exactly reverse of encoding

To encode the bimap to image:

note that if you get the base64 string from other process like JSInterface, the string will start with the base64’s header like ‘data:image/png;base64,’, you need to cut it off if you use BitmapFactory.decodeByteArray to decode it.

Not the answer you’re looking for? Browse other questions tagged android bitmap base64 or ask your own question.

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