title: Mapbox using flutter
body: <p>I want to integrate mapbox using flutter
  The thing I am doing is just installing my sdk in pubsec.yaml and placing the access token in Android Manifest file and Info.plist</p>
  
  <p>Here is my pubsec.yaml where I am adding mapbox_gl</p>
  
  <pre><code>dependencies:
    flutter:
      sdk: flutter
  
    # The following adds the Cupertino Icons font to your application.
    # Use with the CupertinoIcons class for iOS style icons.
    cupertino_icons: ^0.1.2
    mapbox_gl: ^0.0.3
  </code></pre>
  
  <p>I have not yet added any code in dart file and just trying to run the application but it gives me the error</p>
  
  <pre><code>/flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:16: error: cannot find symbol
  import androidx.annotation.NonNull;
                            ^
    symbol:   class NonNull
    location: package androidx.annotation
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:130: error: cannot find symbol
    private static String getAccessToken(@NonNull Context context) {
                                          ^
    symbol:   class NonNull
    location: class MapboxMapController
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:298: error: cannot find symbol
    private void enableLocationComponent(@NonNull Style style) {
                                          ^
    symbol:   class NonNull
    location: class MapboxMapController
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:315: error: cannot find symbol
    private void enableSymbolManager(@NonNull Style style) {
                                      ^
    symbol:   class NonNull
    location: class MapboxMapController
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:326: error: cannot find symbol
    private void enableLineManager(@NonNull Style style) {
                                    ^
    symbol:   class NonNull
    location: class MapboxMapController
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:333: error: cannot find symbol
    private void enableCircleManager(@NonNull Style style) {
                                      ^
    symbol:   class NonNull
    location: class MapboxMapController
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:556: error: cannot find symbol
    public boolean onMapClick(@NonNull LatLng point) {
                               ^
    symbol:   class NonNull
    location: class MapboxMapController
  /flutter/.pub-cache/hosted/pub.dartlang.org/mapbox_gl-0.0.3/android/src/main/java/com/mapbox/mapboxgl/MapboxMapController.java:286: error: cannot find symbol
      public void onStyleLoaded(@NonNull Style style) {
                                 ^
    symbol: class NonNull
  Note: Some input files use or override a deprecated API.
  Note: Recompile with -Xlint:deprecation for details.
  Note: Some input files use unchecked or unsafe operations.
  Note: Recompile with -Xlint:unchecked for details.
  8 errors
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':mapbox_gl:compileDebugJavaWithJavac'.
  &gt; Compilation failed; see the compiler error output for details.
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  
  BUILD FAILED in 4s
  *******************************************************************************************
  The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
  *******************************************************************************************
  Finished with error: Gradle task assembleDebug failed with exit code 1
  </code></pre>
  
  <p>Any help is appreciated.</p>