ImageView displaying in layout but not on actual device

Question

I have an ImageView that I want to display matching the full width of the device, I realized that like this:

Answer 1

I had the same issue, it is only showing in Design tab for Android Studio 2.2.

What I did to make it work is to change the automatic key assigned (populated via Drag/Drop ImageView) from app:srcCompat="@drawable/logo" to android:src="@drawable/logo" in Text tab to make it appear on both the emulator and the device e.g