The installed application is not displayed on the tablet, what should I do?

Question

Java

I download the compiled application (app-debug.apk) to the tablet, install it, writes that the application is installed. But the "open" button is not active. And in the list of applications on the tablet, it is not displayed and is not searched for in the search, as if it simply does not exist. Everything started fine on the virtual emulator.

What to do?