Encode To Base64 : Base64 « Date Type « Android

1. Android
2. Date Type
3. Base64

Encode To Base64

  
//package pl.przemelek.android.util;

class Util {
  private static String charSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
   
  public static String encodeToBase64(String text) {  
    int[] encoded = new int[text.length()*8/6+4];
    int trueLen = text.length()*8/6+1;
    int newLen = 0;
    for (int idx=0; idx<text.length(); idx+=3) {
      int end = idx+3;
      if (end>text.length()) {
        end = text.length();
      }
      String toWork = text.substring(idx,end);
      char a = 0;
      char b = 0;
      char c = 0;
      if (toWork.length()>0) { a = toWork.charAt(0); }
      if (toWork.length()>1) { b = toWork.charAt(1); }
      if (toWork.length()>2) { c = toWork.charAt(2); }
      int _a = (a & (63 << 2)) >> 2;      
      int _b = ((a & 3)  << 4) +((b & (15 <<4)) >> 4);
      int _c = ((b & 15) << 2) +((c & (3  <<6)) >> 6);
      int _d = (c & 63);
      encoded[newLen++] = charSet.charAt(_a);
      encoded[newLen++] = charSet.charAt(_b);
      encoded[newLen++] = charSet.charAt(_c);
      encoded[newLen++] = charSet.charAt(_d);      
    }
    String encodedStr = "";
    for (int idx=0; idx<trueLen; idx++) {
      if (encoded[idx]!=0) {
        encodedStr+=(char)encoded[idx];
      }
    }
    while (encodedStr.length()%4!=0) {
      encodedStr+="=";
    }
    return encodedStr;
  }
}

   
    
  

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