Develop a comprehensive Android e-commerce app similar to Amazon and AliExpress using Android Studio and Firebase in this extensive 14-hour tutorial. Learn to create a fully functional shopping application with features like user authentication, product management, shopping cart functionality, order processing, and admin panel integration. Master Firebase integration for real-time database management, user authentication, and cloud storage. Implement advanced features such as search functionality, product categorization, and seller accounts. Gain hands-on experience in building a robust e-commerce platform, including login/signup systems, product listings, cart management, order confirmation, and admin controls for managing products and orders.