google_maps_flutter - 自定义标记图标：无法启用 MyLocation 图层，因为未授予位置权限

Posted 2023-02-18

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【中文标题】google_maps_flutter - 自定义标记图标：无法启用 MyLocation 图层，因为未授予位置权限【英文标题】：google_maps_flutter - Custom Marker Icons: Cannot enable MyLocation layer as location permissions are not granted 【发布时间】：2021-07-19 14:59:54 【问题描述】：

我正在使用 google_maps_flutter 并想使用自定义标记图标（基于类别，我想使用不同的图标）。

代码

AndroidManifest.xml

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>

pubspec.yaml google_maps_flutter: ^1.0.6

Maps_view.dart

HashMap bitmaps = new HashMap<String, BitmapDescriptor>();

@override
  void initState() 
    super.initState();
    _createBitMaps();
  

  void _createBitMaps() 
    List<String> cats = categories; // List of categories
    // Based on the category, I want to choose a different asset. The name of the asset and the name of the category are for this reason the same. 
    for (String cat in cats) 
      BitmapDescriptor.fromAssetImage(
        ImageConfiguration(size: Size(48, 48)), 'lib/assets/categorie_icons_location/' + cat + '.png').then((onValue) 
          setState(() => bitmaps[cat] = onValue);
        
      );
    
  
...
_markers.add(
                       Marker(
                         markerId: MarkerId('_' + docs[i]['title'] + '_' + docs[i]['latitude'] + '_' + docs[i]['longitude']),
                         position: LatLng(double.parse(docs[i]['latitude']), double.parse(docs[i]['longitude'])),
                         // Use custom icon based on 'category' (from a firebase document) 
                         icon: bitmaps[docs[i]['category']],
                         infoWindow: InfoWindow(
                           title: docs[i]['title'],
                           snippet: docs[i]['street'],
                           onTap: () 
                         )
                       )
                     );