The Complete Evolution of Android Navigation: From XML to Navigation 3 (With Real-World Shopping App)

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In this comprehensive guide, I’ll walk you through the entire evolution of Android navigation — from the early days of manual Fragment transactions to the revolutionary Navigation 3. More importantly, I’ll show you how to implement the same e-commerce shopping app using each version, so you can see exactly how the approach has evolved and make informed decisions for your projects.

Before Navigation Component: The Dark Ages

Let me start with a confession: I’ve written code like this in production apps:

// The old way - manual fragment transactions (2015-2017)
supportFragmentManager.beginTransaction()
    .replace(R.id.container, ProductDetailFragment.newInstance(productId))…