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Actually, I can't find anywhere to download sun.misc.BASE64Encoder. Somebody advise that it can be found in
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Alternatively, there is a package, Commons Codec, from apache.org.
To use the Commons Codec, you have to download it from http://commons.apache.org/codec/download_codec.cgi, and save it to your local driver. The current version 1.4 that requires a minimum of JDK 1.4.
In Eclipse, right click your project > Build Path > Add External Archives >, browse to select the downloaded and extracted JAR.
The syntex to encode a input to base54 is:
import org.apache.commons.codec.binary.Base64;
String outputString = new String(Base64.encodeBase64(inputString.getBytes()));
Both inputString and outputString are in type String.
Actual usage in my Android Twitter Client.