If you want to use your Android device as a projector, there are a few things you need to do first. First, connect your Android device to the projector using an HDMI cable. Next, open the Settings app on your Android device and select Display. Under “Projector,” select “Android Device.” Finally, under “Projector settings,” select “Projector input.” You’ll now be able to choose which type of input your Android device is using: HDMI or USB. ..