write an Android app

You are required to write an Android app that will measure the speed of the lift in the main building in the campus.. When complete you should be able to enter the lift on the ground floor, start the app and proceed to the 4th floor. As the smart phone travels up through the floors it should be continuously measuring the speed of the lift. Once stationary at the top you should stop the measurement process. At a minimum your app should output the maximum speed reached. Also you might consider providing a plot of speed against time. You should firstly design the UI and then partition the task into sub tasks and work out a design strategy for each subtask and then get the subtask working. You will need to investigate how the accelerometer can be used to measure speed. Submit a formal report on your work which should consist of a detailed background discussion on the software structure of your app, a detailed description of your code implementation, along with a copy of your code which should be heavily commented.