react-native-device-info: Time zone never updates

I found an issue where if you change the device’s timezone and then do DeviceInfo.getTimezone() it will result in the time zone it was originally when app initially loaded and not the changed timezone.

react-native-device-info: 0.9.8 react-native: 0.46.3 Platform: iOS and Android

About this issue

Original URL
State: closed
Created 7 years ago
Reactions: 11
Comments: 15

Most upvoted comments

Sure. @sam1463

brianinator on Aug 7, 2018

@sam1463 I wouldn’t mind adding it if a PR was submitted 😃

machour on Aug 7, 2018

Ok, here are the highlights:

// iOS bridge
//  ....
RCT_EXPORT_METHOD(getTimeZone:(RCTResponseSenderBlock)callback)
{
  callback(@[@{@"timeZone": [self timeZone]}]);
}
- (NSString*)timeZone
{
  NSTimeZone *localTimeZone = [NSTimeZone localTimeZone];
  return localTimeZone.name;
}
// ...

// Android bridge
// ...
@ReactMethod
public void getTimeZone(final Callback callback) {
    try {
        WritableMap map = Arguments.createMap();
        map.putString("timeZone", TimeZone.getDefault().getID());
        callback.invoke(map);
    } catch (Exception e) {
        WritableMap map = Arguments.createMap();
        map.putString("error", "Sorry, could not get time zone. Please try again.");
        callback.invoke(map);
    }
}
// ...

// react-native side
// ...
const TimeZoneManager = NativeModules.TimeZoneManager;
// ...
function getTimeZone(callback) {
  TimeZoneManager.getTimeZone(res => callback(res.timeZone));
}
// ...

brianinator on Feb 14, 2018