FileSystem.md

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Getting Started: File system information

1. Storage location: The main storage location of this app is
   /sdcard/Andorid/data/<flavorType>/files/MGMapViewer
   where sdcard is not a real sdcard. It's rather the default external storage location of Android. Typically it's a symlink to /storage/self/primary, which again is a symlink to /storage/emulated/0. Depending on your device there might be diffetent names. In any case it has following typpical layout:

    

   The <flavorType> is depending on your installation one of these values

   • de.soft4mg.mgmap.rel (official playstore variant)
   • de.soft4mg.mgmap (debug version of playstore flavor - apk only installable via AndroidStudio)
   • mg.mamap.rel (release version of apk from mg4gh github page)
   • mg.mamap (debug version of apk from mg4gh github page)

   Remember the storage location, you might need it. Blame Google, if you don't like it :-)

   Keep in mind that the uninstall of the app deletes this directory including all data!
   With each Android version it became more difficult to access this location with a file manager on the device. Now (Android 15) access doesn't work any longer.

   With a USB cable connected to your device you can access the /sdcard folder - on a PC this folder is shown as the "root" folder of your device.

   But there is also a good news: There is a new feature file manager. It allows you to show, edit, share and delete all files as needed.

2. The app creates below the MGMapViewer directory new subdirectories:

   MGMapViewer/apk/                          // to store downloaded apk
              /backup                        // backup and restore related data
                     /backup                 // contains backup related files
                     /restore                // contains restore related files
              /config/                       // configuration data
                     /search/                // search configuration data
              /hgt/                          // store hgt height data files
              /log/                          // store log files
              /maps/                         // store map related data
                   /mapsforge/               // store mapsforge maps - unzipped
                   /mapstores/               // store offline tile stores
                   /maponline/               // store descriptions for online tile stores
                   /mapgrid/                 // store description files for grid map layers
              /themes/                       // store themes for mapsforge maps
              /track/                        // store track related data
                    /gpx                     // store tracks in .gpx format
                    /meta                    // store meta data of tracks - statistics and bounding box 
                                             //    information on a set of latitude/longitude values
                    /recording               // store all data of the currently recording track - enables 
                                             //    to continue recording after app or device restart

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