I’m building a unity android application and It all works fine but when I try to install it through build and run, unity just compiles it and create an .apk but it doesn’t install directly to my divice, android sdk is installed properly and my device is connected properly. After the compilation it just creates an .apk and saying “Done!”. I have to connect my storage and install the apk manually (What a hassle). I get this warnings though.
It seems you are using Vuforia and those warning are related to Vuforia development.
For the device to allow Build and Run, you need your device driver installed on your machine so that adb will find it.
At the moment, I would guess that running a cmd with adb devices return an empty list.
Note that some devices like my acer iconia will simply not work…(guess I should have not bought Acer).
When running with Android it might be better to use Eclipse since you can see the log and figure out what is wrong. Just click Google Android Project in your build editor and it will generate the Android project that you can open in Eclipse.