ViewBinding is an amazing tool for Android but it's not so fit in Android development as we still have to do some config. BindingExtension is built to provide a simpler usage.

Add Jitpack repository to your root build.grable:

allprojects {
  repositories {
    ...
    maven { url 'https://jitpack.io' }
  }
}

Then add dependency in your module build.gradle:

dependencies {
  implementation 'com.github.jintin:BindingExtension:3.1.0'
}

First of all, BindingExtension using refelction a lot to link many things internally in order to provide simple usage. To prevent having trouble with proguard, please remember to exclude ViewBinding related method in your proguard-rules file like this:

-keepclassmembers class * implements androidx.viewbinding.ViewBinding {
     public static ** inflate(...);
}

Extend from BindingActivity with your ViewBinding type then you can use binding directly after calling super.onCreate(savedInstanceState) and you don't have to call setContentView anymore:

class MainActivity : BindingActivity<ActivityMainBinding>() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding.label.setText(R.string.activity_label)
    }
}

Extend from BindingFragment with your ViewBinding type then you can use binding directly after super.onCreateView(inflater, container, savedInstanceState) is called:

class MainFragment : BindingFragment<FragmentMainBinding>() {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        binding.button.setOnClickListener {
            binding.button.setText(R.string.fragment_label)
        }
    }
}

BindingExtension provide an extension function for ViewGroup, you can call ViewGroup.toBinding() in onCreateViewHolder to get your desire type of ViewBinding. And ViewHolder can than access ViewBinding directly without further transformation.

// inside adapter
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
    return MainViewHolder(parent.toBinding())
}

// ViewHolder
class MainViewHolder(private val binding: AdapterMainBinding) :
    RecyclerView.ViewHolder(binding.root) {

    fun bind(data: String) {
        binding.name.text = data
    }
}

You can go to ./app module for more information.

Bug reports and pull requests are welcome on GitHub at https://github.com/Jintin/BindingExtension.