I need to open google maps using kml file wich already exists on sdcard. (/sdcard/example.kml)
I tried:
Open local KML File in Google Maps on Androi
You need to use the geo URI scheme syntax for your Intent data:
Uri.parse("geo:0,0?q=file:///sdcard/example.kml")
The code in this answer works for me: How to plot a pre-build map from google maps on a MapView