Codenameone本机地图离线？ [英] Codenameone native maps offline?

问题描述

引起我注意的是，当我在codenameone中使用本机地图并尝试更改相机位置时，地图变为空白，无论如何，我是否可以在没有互联网连接的情况下使用本机地图功能

it was brought to my attention that when I use the native maps in codenameone , and try to change the camera position the maps get blank , is there anyway that I could use the native maps functionality with no internet connection

final String HTML_API_KEY = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
 final MapContainer cnt = new MapContainer(HTML_API_KEY);
cnt.addMarker(EncodedImage.createFromImage(MarkerImg, false), new Coord(latitude, langitude), "", "", e3->{
});
Container root = LayeredLayout.encloseIn(
BorderLayout.center(cnt)
);
mapForm.add(BorderLayout.CENTER, root);
mapForm.revalidate();

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更新：

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Update :

使用脱机方法时在IOS上遇到的异常：

The exception that I face on IOS when using the offline method :

MBTilesProvider provider = null;
        try{
            if ( MBTilesProvider.isLoaded("xxxxx.cn1tiles") ){
                provider = new MBTilesProvider("xxxxx.cn1tiles");
            } else {
                provider = MBTilesProvider.create("xxxxx.cn1tiles",fetchResourceFile().getData("xxxxx.cn1tiles"));
            }
        }catch(Exception e){
            e.printStackTrace();
            new GlobalOperations().ShowDialog(null, "OffLine Map", "there was a problem with loading the map file "+e.getMessage());
            return;
        }

java.lang.NullPointerException
    at ca_weblite_codename1_mapbox_MBTilesProvider.create:221
    at userclasses_StateMachine.beforeMap:5850
    at generated_StateMachineBase.beforeShow:5850
    at com_codename1_ui_util_UIBuilder.showForm:2518
    at com_codename1_ui_util_UIBuilder.showForm:2565

感谢帮助使地图可以在没有互联网连接的情况下工作

appreciate the help to make the map work with no internet connection

问候，

推荐答案

据我所知，Google Native Maps不支持离线功能，尽管他们的应用程序对此具有某些支持。您可以使用它不提供与本机地图相同级别的UX，但可以离线使用： https：// github.com/shannah/CN1OfflineMaps

The Google Native Maps don't support offline functionality as far as I know although their app has some support for that. You can use this which doesn't offer the same level of UX as the native maps but works offline: https://github.com/shannah/CN1OfflineMaps

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