[BUG] With map downloading

[jonjon0815]

What is the bug?

I downloaded a map with this code.

final region = RectangleRegion(
  LatLngBounds(
    LatLng(49.04939038046036, 8.761878343788906), // North West
    LatLng(48.41420735271916, 9.885473628398131), // South East
  ),
);

final downloadable = region.toDownloadable(
  5, // Minimum Zoom
  8, // Maximum Zoom
  TileLayer(
    urlTemplate: 'http://tile.openstreetmap.org/{z}/{x}/{y}.png',
    userAgentPackageName: 'exampleUser',
  ),
);

print(downloadable.toString());

FMTC.instance('storeName').download.check(downloadable).then((value) {print(value);});

Stream<DownloadProgress> stream = FMTC.instance('storeName').download.startForeground(region: downloadable);

stream.forEach((element) {print(element.percentageProgress);});
print("gespeicher!");`

With console output:

I/flutter ( 6268): gespeicher!
I/flutter ( 6268): 10
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk hostname=tile.openstreetmap.org; servname=(null); netid=0; mark=0
D/libc-netbsd( 6268): [getaddrinfo]: mtk ai_addrlen=0; ai_canonname=(null); ai_flags=1024; ai_family=0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0
I/flutter ( 6268): 10.0
I/flutter ( 6268): 20.0
I/flutter ( 6268): 30.0
I/flutter ( 6268): 40.0
I/flutter ( 6268): 50.0
I/flutter ( 6268): 60.0
I/flutter ( 6268): 70.0
I/flutter ( 6268): 80.0
I/flutter ( 6268): 90.0
I/flutter ( 6268): 100.0

But the map only shows white screen. For the map I use this code:

FlutterMap(
    options: MapOptions(
      center: LatLng(auf.alt??0.0, auf.lang??0.0),
      zoom: 8,
      keepAlive: true,
      interactiveFlags: InteractiveFlag.all & ~InteractiveFlag.rotate,
    ),
    nonRotatedChildren: [],
    children: [
      TileLayer(
        tileProvider: FMTC.instance('storeName').getTileProvider(),
        //urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
        //userAgentPackageName: 'com.example.app',
      ),
      MarkerLayer(
        markers: [
          Marker(
            point: LatLng(auf.alt??0.0, auf.lang??0.0),
            width: 50,
            height: 50,
            builder: (context) => buildIcon(),
          ),
          Marker(
            point: LatLng(auf.alt??0.0, auf.alt??0.0),
            width: 40,
            height: 40,
            builder: (context) => logoIcon(),
          ),
        ],
      ),
      CurrentLocationLayer(),
    ],
  ),

What is the expected behaviour?

show Map

How can we reproduce this issue?

No response

Do you have a potential solution?

I don't know why

D/libc-netbsd( 6268): getaddrinfo: tile.openstreetmap.org get result from proxy gai_error = 0

is thrown.

Can you provide any other information?

No response

Platforms Affected

Android

Severity

Erroneous: Prevents normal functioning and causes errors in the console

Frequency

Consistently: Always occurs at the same time and location

Requirements

• I agree to follow this project's Code of Conduct
• My Flutter/Dart installation is unaltered, and flutter doctor finds no relevant issues
• I am using the latest stable version of this package
• I have checked the FAQs section on the documentation website
• I have checked for similar issues which may be duplicates

[JaffaKetchup]

Hi @jonjon0815,
In your TileLayer, you still need to provide the urlTemplate and userAgentPackageName, and this should be the same template as used in downloading.
Please try this and let me know how it goes :)

Note that you should not use OpenStreetMap for bulk downloading! If you choose to ignore their rules, you may be banned!

[jonjon0815]

Thank you for your answer. The map is now displayed again. I have limited the size to 250 tiles so it should be ok? But now I get errors like this when moving the map

E/flutter (15249): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: FileSystemException: Cannot create file, path = '/data/user/0/com.example.test_aac/app_flutter/fmtc/stores/storeName/tiles/https___tile.openstreetmap.org_14_8608_5630.png' (OS Error: No such file or directory, errno = 2) E/flutter (15249): #0 _File.create.<anonymous closure> (dart:io/file_impl.dart:255:9) E/flutter (15249): <asynchronous suspension>

[JaffaKetchup]

Great @jonjon0815! You also need to ensure your store is ready and created: check the manage chain.

[jonjon0815]

Thank you!

[JaffaKetchup]

No problem!