I want to develop an app for mobile devices .I'm using ArcGIS SDK for android and i want to have an offline basemap in the app . One solution is use to tpk file.but the size of tpk is too large for the app ( 70 megabyte) . Is there any way to create an offline map with small size ? Is it possible to use vector base map with high performance ? Is there any API that i can to use offline map with small size ?