Android Base64 InputStream Encode streamToBase64(InputStream in, StringBuilder sb)

Description

stream To Base

Declaration

public static void streamToBase64(InputStream in, StringBuilder sb)
            throws IOException 

Method Source Code

//package com.java2s;
import java.io.IOException;
import java.io.InputStream;

import android.util.Base64;

public class Main {
    private static final int BASE64_DATA_URI = Base64.NO_WRAP;

    public static void streamToBase64(InputStream in, StringBuilder sb)
            throws IOException {
        int buflen = 4096;
        byte[] buffer = new byte[buflen];
        int offset = 0;
        int len = 0;
        while (len != -1) {
            len = in.read(buffer, offset, buffer.length - offset);
            if (len != -1) {
                // must process a multiple of 3 bytes, so that no padding chars 
                // are placed 
                int total = offset + len;
                offset = total % 3;//from   w  ww . j av a 2  s . c  om
                int bytesToProcess = total - offset;
                if (0 < bytesToProcess) {
                    sb.append(Base64.encodeToString(buffer, 0,
                            bytesToProcess, BASE64_DATA_URI));
                }
                // shuffle unused bytes to start of array
                System.arraycopy(buffer, bytesToProcess, buffer, 0, offset);
            } else if (0 < offset) {
                // flush
                sb.append(Base64.encodeToString(buffer, 0, offset,
                        BASE64_DATA_URI));
            }
        }
        in.close();
    }
}

Related

1. encode(InputStream in, Writer writer)
2. encode(InputStream in, OutputStream out)