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https://github.com/maplibre/flutter-maplibre-gl

A flutter package for showing customizable vector/raster maps with MapLibre (forked from tobrun/flutter-mapbox-gl)
https://github.com/maplibre/flutter-maplibre-gl

flutter flutter-plugin hacktoberfest maplibre maps vector-map vector-tiles

Last synced: 1 day ago
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A flutter package for showing customizable vector/raster maps with MapLibre (forked from tobrun/flutter-mapbox-gl)

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README 

        
# Flutter MapLibre GL



[![Pub Version](https://img.shields.io/pub/v/maplibre_gl)](https://pub.dev/packages/maplibre_gl)

[![likes](https://img.shields.io/pub/likes/maplibre_gl?logo=flutter)](https://pub.dev/packages/maplibre_gl)

[![Pub Points](https://img.shields.io/pub/points/maplibre_gl)](https://pub.dev/packages/maplibre_gl/score)

[![stars](https://badgen.net/github/stars/maplibre/flutter-maplibre-gl?label=stars&color=green&icon=github)](https://github.com/josxha/flutter-maplibre-gl/stargazers)



This Flutter plugin allows to show **embedded interactive and customizable

vector maps** as a Flutter widget.



- This project is a fork

  of [flutter-mapbox-gl](https://github.com/tobrun/flutter-mapbox-gl),

  replacing its usage of Mapbox GL libraries with the open

  source [MapLibre GL](https://github.com/maplibre) libraries.

- The repository has been transferred to

  the [MapLibre](https://github.com/maplibre)

  organization. You shouldn't see any negative effects, as GitHub automatically

  redirects references from the old URL to the new URL. Please

  see [#221](https://github.com/maplibre/flutter-maplibre-gl/issues/221) for

  more information.



### Supported Platforms



- Support for **web** through [maplibre-gl-js](https://github.com/maplibre/maplibre-gl-js)

- Support for **android** and **iOS** through [maplibre-native](https://github.com/maplibre/maplibre-native)



This project only supports a subset of the API exposed by these libraries.



### Supported API



| Feature        | Android | iOS | Web |

|----------------|:-------:|:---:|:---:|

| Style          |    ✅    |  ✅  |  ✅  |

| Camera         |    ✅    |  ✅  |  ✅  |

| Gesture        |    ✅    |  ✅  |  ✅  |

| User Location  |    ✅    |  ✅  |  ✅  |

| Symbol         |    ✅    |  ✅  |  ✅  |

| Circle         |    ✅    |  ✅  |  ✅  |

| Line           |    ✅    |  ✅  |  ✅  |

| Fill           |    ✅    |  ✅  |  ✅  |

| Fill Extrusion |    ✅    |  ✅  |  ✅  |

| Heatmap Layer  |    ✅    |  ✅  |  ✅  |



## Get Started



#### Add as a dependency



Add `maplibre_gl` to your project by running this command:



```bash

flutter pub add maplibre_gl

```



or add it directly as a dependency to your `pubspec.yaml` file:



```yaml

dependencies:

  maplibre_gl: ^0.19.0

```



### iOS



There is no specific setup for iOS needed any more to use the package.

If you added specific lines in an earlier version, you'll have to remove them

or your project won't build.



View obsolete code



```ruby

source 'https://cdn.cocoapods.org/'

source 'https://github.com/m0nac0/flutter-maplibre-podspecs.git'



pod 'MapLibre'

pod 'MapLibreAnnotationExtension'

```



#### Use the location feature



If you access your users' location, you should also add the following key

to `ios/Runner/Info.plist` to explain why you need access to their location

data:



```xml 



  NSLocationWhenInUseUsageDescription

  [Your explanation here]



```



A possible explanation could be: "Shows your location on the map".



### Android



There is no specific setup for android needed to use the package.



#### Use the location feature



If you want to show the user's location on the map you need to add

the `ACCESS_COARSE_LOCATION` or `ACCESS_FINE_LOCATION` permission in the

application manifest `android/app/src/main/AndroidManifest.xml`.:



```xml



    

    



```



Starting from Android API level 23 you also need to request it at runtime. This

plugin does not handle this for you. Our example app uses the

flutter "[location](https://pub.dev/packages/location)" plugin for this.



### Web



Include the following JavaScript and CSS files in the `` of

your `web/index.html` file:



```html



```



## Map Styles



Map styles can be supplied by setting the `styleString` in the `MapLibreMap`

constructor. The following formats are supported:



1. Passing the URL of the map style. This should be a custom map style served

   remotely using a URL that start with `http(s)://`

2. Passing the style as a local asset. Create a JSON file in the `assets` and

   add a reference in `pubspec.yml`. Set the style string to the relative path

   for this asset in order to load it into the map.

3. Passing the style as a local file. create an JSON file in app directory (e.g.

   ApplicationDocumentsDirectory). Set the style string to the absolute path of

   this JSON file.

4. Passing the raw JSON of the map style. This is only supported on Android.



### Tile sources requiring an API key



If your tile source requires an API key, we recommend directly specifying a

source url with the API key included.

For example:



```console

https://tiles.example.com/{z}/{x}/{y}.vector.pbf?api_key={your_key}

```



## Documentation



- Check

  the [API documentation](https://pub.dev/documentation/maplibre_gl/latest/).

- See example implementations in

  our [example project](https://github.com/maplibre/flutter-maplibre-gl/tree/main/example).

- For more information about the MapLibre libraries

  visit [maplibre-gl-js](https://github.com/maplibre/maplibre-gl-js)

  and [maplibre-native](https://github.com/maplibre/maplibre-native).



## Getting Help



- **Need help with your code?**: Check

  the [discussions](https://github.com/maplibre/flutter-maplibre-gl/discussions)

  on this repo or open a new one.

  Or look for previous questions on

  the [#maplibre](https://stackoverflow.com/questions/tagged/maplibre) tag —

  or [ask a new question](https://stackoverflow.com/questions/tagged/maplibre).

- **Have a bug to report?**

  [Open an issue](https://github.com/maplibre/flutter-maplibre-gl/issues/new).

  If possible, include a full log, code and information which shows the issue.

- **Have a feature request?**

  [Open an issue](https://github.com/maplibre/flutter-maplibre-gl/issues/new).

  Tell us what the feature should do and why you want the feature.



## Common problems & frequent questions



### Loading .mbtiles tile files or sprites/glyphs from the assets shipped with the app



  Click here to expand / hide.



One approach that has been used successfully to do that is to copy the files

from the app's assets directory to another directory, e.g. the app's cache

directory, and then reference that location.

See e.g. issues https://github.com/maplibre/flutter-maplibre-gl/issues/338

and https://github.com/maplibre/flutter-maplibre-gl/issues/318



---



### Avoid Android UnsatisfiedLinkError



  Click here to expand / hide.



Update buildTypes in `android\app\build.gradle`



```gradle

buildTypes {

    release {

        // other configs

        ndk {

            abiFilters 'armeabi-v7a','arm64-v8a','x86_64', 'x86'

        }

    }

}

```



---



### iOS app crashes when using location based features



  Click here to expand / hide.



Please include the `NSLocationWhenInUseUsageDescription` as

described [here](#location-features)



---



### Layer is not displayed on IOS, but no error



  Click here to expand / hide.



Have a look in your `LayerProperties` object, if you supply a `lineColor`

argument, (or any color argument) the issue might come from here.

Android supports the following format : `'rgba(192, 192, 255, 1.0)'`, but on

iOS, this doesn't work!



You have to have the color in the following format : `#C0C0FF`



---



### iOS crashes with error: `'NSInvalidArgumentException', reason: 'Invalid filter value: filter property must be a string'`



  Click here to expand / hide.



Check if one of your expression is : `["!has", "value"]`. Android support this

format, but iOS does not.

You can replace your expression with :   `["!",["has", "value"] ]` which works

both in Android and iOS.



Note : iOS will display the

error : `NSPredicate: Use of 'mgl_does:have:' as an NSExpression function is forbidden`,

but it seems like the expression still works well.



---



## Contributing



[Feedback](https://github.com/maplibre/flutter-maplibre-gl/issues),

contributing pull requests

and [bug reports](https://github.com/maplibre/flutter-maplibre-gl/issues) are

very welcome!