Wireless controller
 

Is it possible for Android users to play Graal with a PS4 controller?

Supposedly you can connect by holding down the Share and PS button on the Dual Shock 4 controller until the light bar double-blinks, and then selecting the controller under the Bluetooth settings of your phone. If wireless connection doesn't work, you can still connect it directly to the device via a USB cable. Unfortunately I can't test and verify if this works because I don't have a Dual Shock 4 controller.

There are other methods that work with a rooted device, but frankly I'm scared it'll make my phone explode or something.

I already know about this, but I am only able to move around Graal and not use any item. I'm not able to root my phone right now because there is no possible way for me to get it rooted... I tried so many applications that will allow me to root, but no luck.

Without root you won't be able to map the buttons to the on-screen ones so I think you're out of luck until you get a root

I just found my old rooted phone, I think I might start using it[emoji14]

Wow, I'm in luck. I have an old rooted droid bionic with hdmi connectivity. Hell yes.

It won't work long enough to actually be considered usable.

You can use a bluetooth controller for a little bit, but then the app crashes.
At least, it did for me, while using a dedicated android controller.