java - Fast tapping on soft keyboard -

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i'm using textwatcher prevent users insert double spaces. following part of code.

        @override         public void aftertextchanged(editable s) {          final string = s.tostring();             final string b = s.tostring().replace("  ", " ");               if (a.length()>b.length()){                 int pos = name.getselectionstart();                 name.settext(b);                 name.setselection(pos-1);             }}

the code works fine if 1 simple taps slowly. anyway, problems arise when tap quite fast, begins deleting characters before first space.

do have idea why happen , how solve it?


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