(This project is also an Android version of the source code of the accounting and financial management project. It comes with the login and registration function. The first time you use it, you need to register an account first. Note that if your mobile phone or the resolution of the simulator is less than 1280 × 720 The registration button may not be visible (it is crowded out, and the author's adaptation is not good), and the email address and hand may not be available for other registrations)