最近在玩表情符号，这个表情符号Unicode表格，还挺全： http://apps.timwhitlock.info/emoji/tables/unicode 此外也常用这个在线编码转换工具进行验证：http://tool.oschina.net/encode 表情符号的Unicode范围在Android - How to filter emoji (emoticons) from a string?有提到过：
- U+2190 to U+21FF
- U+2600 to U+26FF
- U+2700 to U+27BF
- U+3000 to U+303F
- U+1F300 to U+1F64F
- U+1F680 to U+1F6FF