我有一个 fragment ，里面有 RecyclerAdapter。我想在 onCreateView 方法中初始化适配器，但它在此语句中抛出 "Type mismatch.Required : Context , Found : FragmentActivity" 错误
我不知道为什么第一个显示这个错误，而第二个没有包含编译时错误。
显示错误
recyclerView!!.adapter = RestaurantMenuAdapter(activity)
没有显示错误
recyclerView!!.layoutManager = LinearLayoutManager(activity)
fragment .kt
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?): View? {
// Inflate the layout for this fragment
val view = inflater.inflate(R.layout.fragment_restaurant_menu, container, false)
recyclerView = view.findViewById(R.id.restaurant_container)
recyclerView!!.adapter = RestaurantMenuAdapter(activity)
recyclerView!!.layoutManager = LinearLayoutManager(activity)
RecyclerAdapter.kt
class RestaurantMenuAdapter (val context : Context) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
val inflater = parent.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
return object : RecyclerView.ViewHolder(inflater.inflate(R.layout.item_menu1, parent, false)) {
}
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
}
override fun getItemCount(): Int {
return 10
}
}
最佳答案
把这个改成-:
recyclerView!!.adapter = RestaurantMenuAdapter(activity)
到:
recyclerView!!.adapter = RestaurantMenuAdapter(activity.applicationContext)
关于android - Kotlin 在 fragment 中显示类型不匹配，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48182748/