我的RecyclerView适配器存在问题。 我想在我的RecyclerView Adapter类中调用此方法:
class UIManager {
companion object {
fun updateElem(fromActivity: Activity?)
{
if (fromActivity == null) { return }
val number: TextView = fromActivity.findViewById(R.id.box)
var chest = fromActivity.resources.getString(R.string.chests)
if (DataManager.boxes?.size!! < 2)
chest = fromActivity.resources.getString(R.string.chest)
number.text = DataManager.boxes?.size?.let { "" + DataManager.boxes?.size + " " + chest } ?: "0 " + chest
}
}
}
通常我可以在我的Adapter中创建一个方法并将Activity作为参数传递,然后调用updateElem()。
但是我尝试了很多东西并且它对我不起作用,因为即使我这样做,我也会在我的适配器的覆盖方法中调用它,请参阅:
class RecyclerAdapter(val list: ArrayList<String>) : RecyclerView.Adapter<RecyclerAdapter.ViewHolder>()
{
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view: View = LayoutInflater.from(parent.context).inflate((R.layout.box_elem), parent, false)
return ViewHolder(view)
}
override fun getItemId(position: Int): Long {
return position.toLong()
}
override fun getItemViewType(position: Int): Int {
return position
}
override fun getItemCount(): Int {
return list.size
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.image.setImageResource(R.drawable.original_box)
holder.itemView.setOnClickListener(View.OnClickListener {
removeElemAt(position)
})
}
fun removeElemAt(position: Int) {
list.removeAt(position)
notifyItemRemoved(position)
notifyItemRangeChanged(position, list.size)
// I WANT TO USE THE METHOD HERE
// !!
UIManager.updateElem() <--------------
//
}
class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView){
var image: ImageView = itemView.findViewById(R.id.box_elem)
}
}
}
答案 0 :(得分:1)
如果您需要一个活动参考,您可以在创建时始终将其传递给适配器的构造函数:
class RecyclerAdapter(val activity: Activity, val list: ArrayList<String>)
//...
然后您可以将活动属性用于UIManager.updateElem(activity)调用。