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I wonder if there is some way to draw polygons on Android without using a connection even without showing the map, only drawing the lines.

Currently I can only do this after you have connected at least once on the Internet (probably to validate the key), but I need it completely offline even that does not show the map but only the polygons and lines.

Can anyone help?

Datacoper Software
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  • It's not possible. Although it's not documented (or at least I haven't found it) Google Maps needs connection to validate the API key the first time you open the map. Then you can use all the functionalities without connection. If this is a must, you can evaluate some alternatives like Open Street Maps – antonio Oct 26 '16 at 21:35

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You can use custom TileProvider like in this answer with blank tiles and than draw polygon as usual.

Community
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Andrii Omelchenko
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  • but even so, the polygon will only show if I have already connected to the Internet at some point, right? When I install the application and do not use the internet it only shows the blank screen without the polygon. – Datacoper Software Oct 26 '16 at 18:15
  • "but even so, the polygon will only show if I have already connected to the Internet at some point, right?" - unfortunately yes. As You wrote GM needs to validate the key. – Andrii Omelchenko Oct 26 '16 at 19:44