Method from

core/java/android/net/Uri.java:2058–2077

Creates a part from the encoded and decoded strings. @param encoded part string @param decoded part string

(String encoded, String decoded)

         * @param decoded part string
         */
        static Part from(String encoded, String decoded) {
            // We have to check both encoded and decoded in case one is
            // NOT_CACHED.

            if (encoded == null) {
                return NULL;
            }
            if (encoded.length() == 0) {
                return EMPTY;
            }

            if (decoded == null) {
                return NULL;
            }
            if (decoded .length() == 0) {
                return EMPTY;
            }

            return new Part(encoded, decoded);
        }

        private static class EmptyPart extends Part {
            public EmptyPart(String value) {