Android禁止输入表情符号

 在我们Android开发的项目中,难免有要求在输入框中禁止输入表情,所以呢,写了一个输入框禁止输入表情的demo,供大伙参考

 

效果图

 

 

 

 

如图显示,如果用户输入了表情字符,会提示。

 

EmojiFilter(表情过滤器)

public class EmojiFilter {

 

/** 匹配非表情符号的正则表达式 */

public static final String reg = "^([a-z]|[A-Z]|[0-9]|[\u2E80-\u9FFF]){3,}|@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[\\w](?:[\\w-]*[\\w])?|[wap.]{4}|[www.]{4}|[blog.]{5}|[bbs.]{4}|[.com]{4}|[.cn]{3}|[.net]{4}|[.org]{4}|[http://]{7}|[ftp://]{6}$";

 

public static final Pattern pattern = Pattern.compile(reg);

 

/**

 * 检测是否有emoji字符

 * 

 * @param source

 * @return FALSE,包含图片

 */

public static boolean containsEmoji(String source) {

if (source.equals("")) {

return false;

}

 

int len = source.length();

 

for (int i = 0; i < len; i++) {

char codePoint = source.charAt(i);

 

if (isEmojiCharacter(codePoint)) {

// do nothing,判断到了这里表明,确认有表情字符

return true;

}

}

 

return false;

}

 

private static boolean isEmojiCharacter(char codePoint) {

return (codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA)

|| (codePoint == 0xD)

|| ((codePoint >= 0x20) && (codePoint <= 0xD7FF))

|| ((codePoint >= 0xE000) && (codePoint <= 0xFFFD))

|| ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF));

}

 

/**

 * 过滤emoji 或者 其他非文字类型的字符

 * 

 * @param source

 * @return

 */

public static String filterEmoji(String source) {

 

if (!containsEmoji(source)) {

return source;// 如果不包含,直接返回

}

// 到这里铁定包含

StringBuilder buf = null;

 

int len = source.length();

 

for (int i = 0; i < len; i++) {

char codePoint = source.charAt(i);

 

if (isEmojiCharacter(codePoint)) {

if (buf == null) {

buf = new StringBuilder(source.length());

}

 

buf.append(codePoint);

} else {

}

}

 

if (buf == null) {

return source;// 如果没有找到 emoji表情,则返回源字符串

} else {

if (buf.length() == len) {// 这里的意义在于尽可能少的toString,因为会重新生成字符串

buf = null;

return source;

} else {

return buf.toString();

}

}

 

}

}

demo下载地址:

 

http://download.csdn.net/download/xinanheishao/9870832



posted on 2017-06-14 22:21  XiNanHeiShao  阅读(734)  评论(0编辑  收藏  举报

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