Let2Wish (flea market app): Technical Report

This report mainly introduces the requirements, design and implementation of a second-hand trading platform system, so that readers can have an overall understanding of the system structure and implementation. In the requirements section, the report focuses on the functional requirements of the system, and classifies the requirements according to the division of user roles. Next, according to the requirements and functional requirements, the development framework and background data model of the system are designed, and the data model is briefly introduced. In the implementation stage, we focus on the core function modules of the system, and give a detailed description and explanation of the completed function points. Through the implementation of this system, the author is familiar with the main process and method of development based on firebase and Android, which is of great benefit to the future software development work.