(Source code introduction:
The address book contains four modules: dial, contact, SMS and personal center.
Among them, the dial functions include T9 keyboard search, mobile phone search for contacts, and display call records when loading for the first time.
The contact module displays the contact's name and phone number, which can be quickly retrieved, and can select contacts in different groups. The effect of group display is to display the information list (including phone number, quantity, time, information preview), conversation list, and create a new function SMS according to the information module that changes the effect of everyone's menu (I spent a lot of time adding a contact module to this function, but now it can only be regarded as the realization of basic functions. Who has a better method? I hope you can exchange messages)
The personal center is left to everyone's imagination.)