how to display arduino output on android screen

how can we display the output we get from Arduino on an android screen can anyone help out with the code both ways

How will you communicate with the phone? Bluetooth, WiFi or what?

If you want code written for you, post in the Gigs and Collaborations section. Expect to pay. Oterwise do some research and trytow whrite the code. We will be happy to help to get your code to work if you make some effort.