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How to detect emojis in a String in Flutter using Dart?

Tags:

flutter

dart

I want to take a String value, and find out if there are any emojis in it. Might be some regex magic but not sure how to do that.

like image 390
Remo Bajwa Avatar asked Mar 30 '19 15:03

Remo Bajwa


2 Answers

Was looking for the same thing.

Found this newly published package: https://pub.dartlang.org/packages/flutter_emoji

MIT license.

Looking at the source code it seems like this is the regex used:

/// A tweak regexp to pass all Emoji Unicode 11.0
/// TODO: improve this version, since it does not match the graphical bytes.
static final RegExp REGEX_EMOJI = RegExp(r'(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])');

I hope this information can be helpful.

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ninnepinne Avatar answered Nov 15 '22 05:11

ninnepinne


Since @ninnepinne's answer does not work, because it will include some Chinese characters such as "。" (the "." in Chinese which is very common), I have to find another solution.

After some research, I find this answer about javascript quite helpful.

In dart, we can use the following:

var regex = RegExp(
      r'(?:[\u00A9\u00AE\u203C\u2049\u2122\u2139\u2194-\u2199\u21A9-\u21AA\u231A-\u231B\u2328\u23CF\u23E9-\u23F3\u23F8-\u23FA\u24C2\u25AA-\u25AB\u25B6\u25C0\u25FB-\u25FE\u2600-\u2604\u260E\u2611\u2614-\u2615\u2618\u261D\u2620\u2622-\u2623\u2626\u262A\u262E-\u262F\u2638-\u263A\u2640\u2642\u2648-\u2653\u2660\u2663\u2665-\u2666\u2668\u267B\u267F\u2692-\u2697\u2699\u269B-\u269C\u26A0-\u26A1\u26AA-\u26AB\u26B0-\u26B1\u26BD-\u26BE\u26C4-\u26C5\u26C8\u26CE-\u26CF\u26D1\u26D3-\u26D4\u26E9-\u26EA\u26F0-\u26F5\u26F7-\u26FA\u26FD\u2702\u2705\u2708-\u270D\u270F\u2712\u2714\u2716\u271D\u2721\u2728\u2733-\u2734\u2744\u2747\u274C\u274E\u2753-\u2755\u2757\u2763-\u2764\u2795-\u2797\u27A1\u27B0\u27BF\u2934-\u2935\u2B05-\u2B07\u2B1B-\u2B1C\u2B50\u2B55\u3030\u303D\u3297\u3299]|(?:\uD83C[\uDC04\uDCCF\uDD70-\uDD71\uDD7E-\uDD7F\uDD8E\uDD91-\uDD9A\uDDE6-\uDDFF\uDE01-\uDE02\uDE1A\uDE2F\uDE32-\uDE3A\uDE50-\uDE51\uDF00-\uDF21\uDF24-\uDF93\uDF96-\uDF97\uDF99-\uDF9B\uDF9E-\uDFF0\uDFF3-\uDFF5\uDFF7-\uDFFF]|\uD83D[\uDC00-\uDCFD\uDCFF-\uDD3D\uDD49-\uDD4E\uDD50-\uDD67\uDD6F-\uDD70\uDD73-\uDD7A\uDD87\uDD8A-\uDD8D\uDD90\uDD95-\uDD96\uDDA4-\uDDA5\uDDA8\uDDB1-\uDDB2\uDDBC\uDDC2-\uDDC4\uDDD1-\uDDD3\uDDDC-\uDDDE\uDDE1\uDDE3\uDDE8\uDDEF\uDDF3\uDDFA-\uDE4F\uDE80-\uDEC5\uDECB-\uDED2\uDEE0-\uDEE5\uDEE9\uDEEB-\uDEEC\uDEF0\uDEF3-\uDEF6]|\uD83E[\uDD10-\uDD1E\uDD20-\uDD27\uDD30\uDD33-\uDD3A\uDD3C-\uDD3E\uDD40-\uDD45\uDD47-\uDD4B\uDD50-\uDD5E\uDD80-\uDD91\uDDC0]))');
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ch271828n Avatar answered Nov 15 '22 07:11

ch271828n