InputFilter[] emojiFilters = { emojiFilter };
edit_nickname.setFilters(emojiFilters);


	private InputFilter emojiFilter = new InputFilter() {

		Pattern emoji = Pattern
				.compile(

						"[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]",

						Pattern.UNICODE_CASE | Pattern.CASE_INSENSITIVE);

		@Override
		public CharSequence filter(CharSequence source, int start, int end,
				Spanned dest, int dstart,

				int dend) {

			Matcher emojiMatcher = emoji.matcher(source);

			if (emojiMatcher.find()) {

				return "";

			}
			return null;

		}
	};

// 非法字符过滤，涵盖了emoji表情：

private InputFilter filter = new InputFilter() {

		@Override
		public CharSequence filter(CharSequence source, int start, int end,
				Spanned dest, int dstart, int dend) {

			for (int i = start; i < end; i++) {
				if (!Character.isLetterOrDigit(source.charAt(i))
						&& !Character.toString(source.charAt(i)).equals("_")
						&& !Character.toString(source.charAt(i)).equals("-")) {
					return "";
				}
			}

			return null;

		}
	};