`allowFontScaling={false}` doesn't work with TextInput's placeholder in Android.

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

1. react-native -v: 0.43.4
2. node -v: v6.11.2
3. npm -v: 3.10.10
4. yarn --version: 0.24.5

Then, specify:

• Target Platform: Android

• Development Operating System: macOS

• Build tools: Android Studio, buildToolsVersion “23.0.1”

Steps to Reproduce

(Write your steps here:)

1. Use TextInput in the project
2. set allowFontScaling={false} the component

Expected Behavior

Text and placeholder size shouldn’t be scaled when user set font size.

Actual Behavior

1. Text size don’t be scaled.(It’s right.)
2. Placeholder size still be scaled.(I think that it’s unreasonable.)

Reproducible Demo

[levynir]

This really is a problem in both ios and android.

[anirudha-ani]

For placeholder fontSize change issue @NelGarbuzova 's solution works. To fix font changing while inputting text the workaround is to -

1. import PixelRatio from react-native
2. In TextInput style set your fontSize to {intendedFontSize / PixelRatio.getFontScale()}

It will fix your fontSize and won’t change because of system settings for both android and iOS. For this workaround don’t set allowFontScaling to false.