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Grab
Grab logoGrab · Feature trail

App Modularization

1 post · Jul 2021

What this trail covers

Grab has adopted a comprehensive app modularization strategy to break down its monolithic Android application into smaller, independent, and interchangeable modules. This approach aims to improve code maintainability, reduce code conflicts, accelerate development cycles, and enhance collaboration among development teams. The strategy involves creating base/core modules (Networking, Analytics, etc.), shared library modules (Styling, Common-UI), feature modules (Payments, Wallet), and kit modules to enable inter-module communication. This has led to significant improvements in build times and developer experience, with over 1,000 modules in the Grab app.

All Grab trails
  1. App Modularisation at ScaleThis post details the approach and design for modularizing the Grab app, including setting up base/core modules, shared library modules, feature modules, and kit modules for inter-module communication. It highlights the benefits of faster build times, fine dependency graphs, reusability, scalability, maintainability, and well-defined code ownership. Limitations such as increased effort, separate configuration files, longer Gradle sync times, and increased IDE resource usage are also discussed. The post also presents the current state with over 1,000 modules and the specific modularization efforts within the Grab Financial Group (GFG) team, showing a significant reduction in build times for their modules.