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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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