Where to put the MMPK File

Question

Hey all,

im trying to do this tutorial Add layers to a map (offline) | ArcGIS for Developers

I need to tell the apk where the location of the PackageFolder is. When i put it on my device or i use the path from my pc. It will not load the mmpk, when i test the apk.

this is how i write it:

var mapPackageFolder = @C:\Users\Test\Desktop\XamarinTest\Vegetation Management;
 var mapPackageFile = @SUEWAG VTPK Grundkarte Beschriftung.mmpk;

this is how i tested it, when i put the folder it to my Device

var mapPackageFolder = @Interner Speicher\XamarianTest;
 var mapPackageFile = @SUEWAG VTPK Grundkarte Beschriftung.mmpk;

do i miss something?

SomeGISGuy · Answer

Are you able to open the file with standard .NET File APIs with that path? Ie File.OpenRead(pathToMmpk) ?
Also make sure you configure your application manifest to read in that location.
With android you can't really package files with the application itself - you can only package assets, and you'd have to "unpack" those files first to a local folder before opening, or downloading it from an online location to that location on first access.

WadimLautenschleger · Answer

Thanks it helped me, but i got it working with Android.OS.Environment.ExternalStorageDirectory.

But now i get this Error:

Esri.ArcGISRuntime.ArcGISRuntimeException: 'Invalid access: Mobile map package failed to open. Check the archive format is correct, zip file with no compression.'

JoeHershman · Answer

There is no C: drive on an iOS or Android device, you cannot set a location like you would in Windows with a full path. The easiest way is to use a Environment.SpecialFolder because this returns the platform specific location. var mapPackageFolder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "SomeSubfolder", "SomePackageName");‍