Monitoring user behavior in real time by modifying the source code of mobile applications is a serious violation of user privacy and illegal behavior. This cannot and should not be done. This behavior violates basic ethical standards and laws and regulations, including but not limited to infringing on user privacy and violating relevant data protection regulations. Application developers have the responsibility to protect the legitimate rights and interests of users and data security. Unauthorized monitoring behavior will undermine users' trust in applications and harm the healthy development of the entire industry. The right way is to develop and operate applications legally and in compliance with regulations, relying on proper functional design and user authorization mechanisms to achieve reasonable data analysis and other functions, and never take illegal means to obtain user information and monitor behavior.