Read-only media

[vascotenner]

🚀 feature request

Problem statement

On my phone, the sd card is oftennin read only modus. Osmand cannot start an display maps.

Solution

Allow to run osmand with the maps stored on an read only medium an allow displaying maps, routing, searching.

Not allowing updating maps, save waypoints favorites etc.

Describe alternatives you've considered

[vshcherb]

Dev comment: It depends on which API is present. OsmAnd needs to write only to certain files such as favorites / tracks when recording, few indexes. But it relies on random file read / search and we need to check which api is available. Is random search in file available or only sequential read.

For example: we can't support Read-only API from DocumentFile Android 11 cause it doesn't support random access.