Regular expression in android for accept only English language

I try

Pattern.matches(开发者_开发百科"[A-Za-z]+"

and it still can accept other languages such as ฟฟฟฟabc or abcฟฟฟ

what should I do?

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^[A-Za-z]+$

Use start-of-string and end-of-string anchors.

If you don't, the regex does not have to match the entire string, but this is what you seem to want.

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Are you working in UTF-8? Have you tried the \uFFFF, where FFFF is the hex representation of the Unicode character.