Anko Fragments v2

FragmentView.kt

class FragmentView(ctx: Context) : RelativeLayout(ctx) {
    var childFragment: Fragment? = null
    get() = field
    set(value) {
        field = value
        if (field == null) { return }
        (context as Activity).fragmentManager.beginTransaction().add(id, field).commit()
    }

    init {
        this.id = View.generateViewId()
    }
}

inline fun ViewManager.fragmentView(theme: Int = 0) = fragmentView(theme) {}
inline fun ViewManager.fragmentView(theme: Int = 0, init: FragmentView.() -> Unit) = ankoView({ FragmentView(it) }, theme, init)

Requires API 17 or above due to View.generateViewId()