ViewBinding in Android provides a type-safe way to access views in your layouts without needing to use the traditional `findViewById()` method. When ViewBinding is enabled, it generates a binding class for each XML layout file in your module. This allows developers to reference views directly, eliminating the risk of runtime exceptions due to incorrect types or null references.
Internally, ViewBinding works by generating a binding class at compile time, corresponding to the layout XML file. For example, if you have a layout file named `activity_main.xml`, ViewBinding creates a `ActivityMainBinding` class. This class contains direct references to all the views defined in the XML layout, allowing you to access them as properties of the binding object.
Example:
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
// Accessing a TextView defined in activity_main.xml
binding.textView.text = "Hello, ViewBinding!"
}
}
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