java - Android android.util.Patterns.EMAIL_ADDRESS strange behaviour -


today experienced strange pattern behaviour.

for instance, on tablet 3.2 stock rom(previously 4.0.+) works well.

but on other 3.2 tablets , 4.0 devices doesn't.

function test email functionality like:

public static boolean checkemail(charsequence emailaddress){     if( build.version.sdk_int >= 8 ){         return android.util.patterns.email_address.matcher(emailaddress).matches();     }     ....

so have in 16'th sources email addres pattern(java code):

public static final pattern email_address     = pattern.compile(         "[a-za-z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +         "\\@" +         "[a-za-z0-9][a-za-z0-9\\-]{0,64}" +         "(" +             "\\." +             "[a-za-z0-9][a-za-z0-9\\-]{0,25}" +         ")+"     );

here 'normalised' version:

[a-za-z0-9\\+\\.\\_\\%\\-\\+]{1,256}\\@[a-za-z0-9][a-za-z0-9\\-]{0,64}(\\.[a-za-z0-9][a-za-z0-9\\-]{0,25})+

regexpal(js regex validator) tells regexp proper, in round brace \\. should \. , \\@ should \@ work in regexpal.

moreover not quite clear, why there 2 '\+' group of symbols in first braces?

get value of pattern using pattern.pattern() function device on works , make own pattern object out of it. way won't have differences in implementations across devices. same goes geocoder, didn't work me on devices.


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