inputStreamToString

public static String inputStreamToString(InputStream fis) throws IOException{
StringBuffer buffer = new StringBuffer();
InputStreamReader isr = new InputStreamReader(fis, "UTF-8"); //o la codificación del XML
Reader in = new BufferedReader(isr);
int ch;
while ((ch = in.read()) > -1) {
buffer.append((char)ch);
}
in.close();
isr.close();
return buffer.toString();
}