Created attachment 16442 [details]
When Entry.Text is bound to a double, it will not accept a comma as a decimal separator when the system is set to language where this is the standard.
The issue is harder to demonstrate on Android however, because of bug#42000. The numeric keyboard on Android does input the comma character even though it is shown on the keyboard regardless of system language.
### Steps to Reproduce
1. Configure device/emulator to locale that uses commas instead of periods for decimals, e.g. Swedish, German
2. Run the project
3. Enter a decimal number, e.g. “12,54”
### Expected Results
The Label below the Entry should display the same value as in the Entry
### Actual Results
Entering a comma followed by a digit causes the comma to disappear because the value is parsed with the comma being the group separator instead.
### Testing Info
Tested with Forms 126.96.36.199
The current workaround is to use a custom converter when setting the bindings, similar to the one provided here: http://stackoverflow.com/a/24448721/6457998
Can you update your sample? I noticed you're not using the converter.
Nevermind. You probably left it out intentionally. From the SO post, it looks like they are working on built-in conversions.
This PR should allow android keyboard to process all keys: https://github.com/xamarin/Xamarin.Forms/pull/396
Should be fixed in 2.3.5-pre1. Thank you!