[Android] MapboxGL.Camera with followUserLocation throws an exception

[rnmapbox]

[Android] MapboxGL.Camera with followUserLocation throws an exception

[ferdicus]

hey @mfazekas, thanks for taking care of this.
Can you elaborate a bit please on how the value can be null at that line when followUserMode was defined?
Just curious.

[mfazekas]

@ferdicus updatedFollowUserMode also get's called from setFollowUserLocation .

We happen to have this.refs.camera.setNativeProps({followUserLocation: true}) before the mode so we set followUserLocation first and it's possibl that followUserMode was not yet set on the native side and it defaults to null.

[ferdicus]

I see, thanks for taking the time explaining it. 👍

[Blind12]

Hi,

I tried many times in many ways to use <MapboxGL.Camera followUserLocation/> with and without the prop followUserMode="normal".

Every time, I got the error above with a null object ref. Is the doc not up to date or the examples I found in the doc using this prop?

Thank you for your time.

[anttijva]

To me it seems at the followUserMode is working a little weird. The icon doesn't change between modes, and the old userTrackingMode "followWithHeading" doesn't seem to exist anymore.

I tried out multiple different configurations but can't seem to get it working.

[mfazekas]

@anttijva followUserMode now can be ['normal', 'compass', 'course'], compass is equivalent to old followWithHeading.
The icons could be changed via UserLocation#renderMode, but for now only ['normal','custom'] is supported.

[Blind12]

@mfazekas

Do you know if it's an expected behavior what you explained above ? About the followUserMode set to null by default and used by followUserLocation. The workaround I found for now is to set a timer and set the followUserLocation : true when the component is mounted or after x seconds.

Thank you.

[mfazekas]

@Blind12 doesn't sound good, you should be able to set both followUserMode and followUserLocation same time without timer

[Blind12]

"@react-native-mapbox-gl/maps": "^7.0.0-rc3",
"react-native": "0.59.9",
"react": "16.8.3",

This simple code :

       <MapboxGL.MapView
           ref={(ref) => (this._map = ref)}
           style={{flex: 1}}
           animated={true}
           rotateEnabled={false}
           pitchEnabled={false}
         >

         <MapboxGL.UserLocation
           renderMode="normal"
         />
         <MapboxGL.Camera
           followUserLocation={true}
           followUserMode="normal"
         />

throw the error posted by the author.

[anttijva]

@anttijva followUserMode now can be ['normal', 'compass', 'course'], compass is equivalent to old followWithHeading.
The icons could be changed via UserLocation#renderMode, but for now only ['normal','custom'] is supported.

@mfazekas Okay that explains the icons, but the functionality is still a mystery. Before, if I activated followWithHeading/followWithCourse, the map would change position according to how I was turning the phone (using gyro/compass?) but now I can't seem to get that working. Any ideas?

[ShepelE]

Hi!
@ferdicus, It looks like the bug I had.
I found some workaround here: https://github.com/react-native-mapbox-gl/maps/issues/344
Please check if it helps in your case

[sugaith]

Still happening

[dorthwein]

still happening