View Binding Android

 Why ?

• To replace boilerplate code of findViewById
• Always type-safe and null-safe 

What ?

• Enable view binding in build.gradle file without library dependencies 
• View Binding generates a binding object for every layout in your module  (activity_main.xml = ActivityMainBinding.class)

Use case : 

buildFeatures {
    viewBinding = true
}

// using View binding in Activity
binding = ActivityMainBinding.inflate(layoutInflater)

binding.progressBar.setVisibility(ProgressBar.INVISIBLE)

// Send button sends a message and clears the EditText
binding.sendButton.setOnClickListener {
        // TODO: Send messages on click
        // Clear input box
        binding.messageEditText.setText("")
}

setContentView(binding.root)