We have been trying to put the basic .net sample on the Leica Zeno 20 UMTS having android Android 4.2.2.
Trying to open a simple "Display Map" page....gives this error.
System.NotSupportedException: Could not activate JNI Handle 0x2b00025 (key_handle 0x4113f7e8) of Java type 'md525ae7a30145b6936c079fc7426298397/DisplayMap' as managed type 'ArcGISRuntimeXamarin.Samples.DisplayMap.DisplayMap'.
We have even tried on the emulator with android 4.2.2.
Any help would be appreciated!
OK I tracked down the bug, and will manifests itself on devices at API Level 16 and Level 17 (ie v4.2 and down).
Luckily I have a workaround for you. In the Application constructor add the following line:
Java.Lang.JavaSystem.LoadLibrary("runtimecore");
Let me know if that works for you or not.