"ionic run android" starts the emulator, and don't deploy it to the device

This is really odd - I had this working fine and I haven't change a single thing with my android setup.

Not a thing.

I have, however, been using Ionic View instead for a long time. I want to test on device again now because some of the plugins don't work on Ionic View.

I'm also getting the

-bash: adb: command not found

error.

Why has this changed?