Android android_hyphenationFrequency in text does not work in react-native 0.64.2

[evd1ser]

Description

I'm trying to add soft hyphenation to app using android_hyphenationFrequency but it doesn't work.

try on new clean app

React Native version:

{
  "name": "TestTestWrapp",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "start": "react-native start",
    "test": "jest",
    "lint": "eslint ."
  },
  "dependencies": {
    "react": "17.0.1",
    "react-native": "0.64.2"
  },
  "devDependencies": {
    "@babel/core": "^7.12.9",
    "@babel/runtime": "^7.12.5",
    "@react-native-community/eslint-config": "^2.0.0",
    "babel-jest": "^26.6.3",
    "eslint": "7.14.0",
    "jest": "^26.6.3",
    "metro-react-native-babel-preset": "^0.64.0",
    "react-test-renderer": "17.0.1"
  },
  "jest": {
    "preset": "react-native"
  }
}

Steps To Reproduce

1. create new app
2. add some text like WillHaveAnHyphenWhenBreakingForNewLine
   2.1 for example I use three text with different symbol
   2.2 WillHave\u00ADAnHyphen\u00ADWhen\u00ADBreaking\u00ADForNew\u00ADLine - in this issue written that it doesn't work for android
   2.3 WillHave\u200BAnHyphen\u200BWhen\u200BBreaking\u200BForNew\u200BLine - wrap for android
3. add maxWidth to container - example 300
4. add text props android_hyphenationFrequency with any value
5. run on android device example: emulator Pixel 4 API 30

Expected Results

To see the result like in this request - #29157

but I don't see anything like it

Snack, code example, screenshot, or link to a repository:

code example:

result example:

text wrap with \u200B but no hyphenation symbol

repository with example - https://github.com/evd1ser/test-rn-andoid-text-hyphenation

[yanel777]

+1

[lpatrun]

It doesn't work on 0.64.1 as well.
I tried on emulator and real device, both being android 8.0 and higher.
I just added android_hyphenationFrequency prop to Text component and tried with 'full', 'balanced', 'high' but it made no difference.

[LukaZagar1995]

+1

[fabOnReact]

seems to me that you are using textBreakStrategy.
Can you reproduce this problem without that prop?

the result should be something like

https://github.com/facebook/react-native/pull/29157/files?file-filters%5B%5D=.js#diff-1654e2fe87ee923670e15697f1556521bb5565e04d6bc2d306c5204f6b5ef4beR211-R232

AFTER

#29157 (comment)

[yanel777]

seems to me that you are using textBreakStrategy.
Can you reproduce this problem without that prop?

the result should be something like

https://github.com/facebook/react-native/pull/29157/files?file-filters%5B%5D=.js#diff-1654e2fe87ee923670e15697f1556521bb5565e04d6bc2d306c5204f6b5ef4beR211-R232

AFTER

#29157 (comment)

@fabriziobertoglio1987
textBreakStrategy = any value or undefined - reproduce this problem

[evd1ser]

seems to me that you are using textBreakStrategy.
Can you reproduce this problem without that prop?

@fabriziobertoglio1987
I'm try without textBreakStrategy too result:

example repo: https://github.com/evd1ser/test-rn-andoid-text-hyphenation

[steffenkleinle]

Still experiencing this on react-native v0.66.4 and v0.67.2 on android under certain(most) circumstances. With texts of certain lengths in views of certain length it does work while for others it does not work apparently.On iOS everything works as it should.
Example: Your example (WillHave\u00ADAnHyphen\u00ADWhen\u00ADBreaking\u00ADForNew\u00ADLine) works fine:

However, if I add \u00ADWill\u00ADitStill\u00ADHaveAnHyphen\u00ADIfIMake\u00ADThisEven\u00ADLonger it won't work anymore:

With zero width spaces everything works fine u200B:

Did you find any workaround (except replacing soft hyphens u00AD with zero width spaces u200B)?

[TheRealMikeD]

I hope this doesn't make things worse, but I was trying to use a value of "balanced" and I got an error:
Invalid android_hyphenationFrequency: balanced
According to the RN docs for RN 0.67 and later, "balanced" is no longer a valid value: https://reactnative.dev/docs/0.67/text#android_hyphenationfrequency-android

That said, I concur with the original poster that none of the values seem to do anything, as far as I can see.
Using RN 0.69.6