Android'de View Binding ve Data Binding nedir?

View Binding ve Data Binding, eski findViewById yerine XML layoutlardaki kodları viewlara daha güvenli ve rahat bir şekilde bağlamak için kullanılan Android özellikleridir. View Binding, tür-güvenli view referansları sağlar; Data Binding ek olarak verileri doğrudan layoutlara bağlar.

findViewById problemi

text

The old way: findViewById to get view references:
  val button = findViewById<Button>(R.id.myButton)
  ✗ verbose; NOT type-safe (cast errors); NOT null-safe (wrong id → null → crash at runtime)
→ View/Data Binding solve these.

kotlin

// View Binding generates a binding class per layout with typed references to its views
val binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
binding.myButton.setOnClickListener { /* ... */ }   // typed, null-safe, no findViewById
binding.titleText.text = "Hello"
// → type-safe (compile-checked), null-safe, concise — the recommended replacement for findViewById

xml

<!-- Data Binding lets you bind data/expressions directly in the layout XML -->
<TextView android:text="@{user.name}" />        <!-- binds to a user object's name -->
<Button android:onClick="@{() -> viewModel.submit()}" />

text

DATA BINDING (more powerful than View Binding):
  → bind layout views directly to data/ViewModels in XML (expressions, two-way binding)
  → can reduce UI-update boilerplate; supports observable data → UI auto-updates
  → more complex; View Binding is simpler and often sufficient
→ Modern apps increasingly use Jetpack COMPOSE instead (no XML binding needed).

Android'de View Binding ve Data Binding nedir?

findViewById problemi

View Binding — tür-güvenli view referansları

Data Binding — verileri doğrudan XML'e bağlama

Neden önemli