LazyView

LazyView.kt

import android.view.View

/**
 * Lightweight alternative for [android.view.ViewStub]
 */
class LazyView<T : View>(
    private val init: () -> T,
) {

    private var view: T? = null

    fun getOrNull(): T? = view

    fun get(): T {
        if (view == null) {
            view = init()
        }
        return view!!
    }

    fun clear() {
        view = null
    }
}



// Sample for Fragment

private val someLazyView = LazyView {
    SomeView(requireContext()).apply {
        binding.rootView.addView(this)
        updateLayoutParams<FrameLayout.LayoutParams> {
            //
        }
    }
}

override fun onDestroyView() {
    super.onDestroyView()
    _binding = null
    someLazyView.clear()
}