Out of memory when encoding file to base64

Question

Using Base64 from Apache commons

public byte[] encode(File file) throws FileNotFoundException, IOException {
        byte[] encoded;
        try (FileInputSt         


        

Answer 1

Well, looks like your file is too large to keep the multiple copies necessary for an in-memory Base64 encoding in the available heap memory at the same time. Given that this is for a mobile device, it's probably not possible to increase the heap, so you have two options:

• make the file smaller (much smaller)
• Do it in a stram-based way so that you're reading from an InputStream one small part of the file at a time, encode it and write it to an OutputStream, without ever keeping the enitre file in memory.