is it possible to recognize in android/Java if a string text is written from Right to left?

Question

I'm writing an android application, and i need to recognize if the text i have in a String is written in a language that is RTL(right to left) ? Thanks!

Answer 1

Two things:

A/ http://pastebin.com/e276zn6y Javascript code to determine the script of a character. Should give you an idea. And with the help of:

B/ ftp://unicode.org/Public/UNIDATA/extracted/DerivedBidiClass.txt

# Bidi_Class=Right_To_Left
0590          ; R # Cn       <reserved-0590>
05BE          ; R # Pd       HEBREW PUNCTUATION MAQAF
05C0          ; R # Po       HEBREW PUNCTUATION PASEQ
05C3          ; R # Po       HEBREW PUNCTUATION SOF PASUQ
05C6          ; R # Po       HEBREW PUNCTUATION NUN HAFUKHA
05C8..05CF    ; R # Cn   [8] <reserved-05C8>..<reserved-05CF>
05D0..05EA    ; R # Lo  [27] HEBREW LETTER ALEF..HEBREW LETTER TAV

[...] truncated

which gives you the direction of all blocks (showing the beginning to the RTL section), you can figure out the rest.

EDIT: You might also want to check for Right-To-Left format characters (U+20xx), see http://www.unicode.org/charts/PDF/U2000.pdf