Android 如何在RecyclerView适配器中使用Snackbar
当尝试为我的RecyclerView适配器使用Snackbar时,返回的错误似乎无法解决。在这种情况下,我应该使用哪个视图?如果字符串资源显示为未解析引用,如何使用它 适配器代码Android 如何在RecyclerView适配器中使用Snackbar,android,kotlin,android-recyclerview,android-snackbar,Android,Kotlin,Android Recyclerview,Android Snackbar,当尝试为我的RecyclerView适配器使用Snackbar时,返回的错误似乎无法解决。在这种情况下,我应该使用哪个视图?如果字符串资源显示为未解析引用,如何使用它 适配器代码 class MyAdapter( private val mCtx: Context, var myList: MutableList<Item>, ) : androidx.recyclerview.widget.RecyclerView.Adapter<MyAdapter.MyVi
class MyAdapter(
private val mCtx: Context,
var myList: MutableList<Item>,
) : androidx.recyclerview.widget.RecyclerView.Adapter<MyAdapter.MyViewHolder>(), Filterable {
private val myListFull = myList.toMutableList()
val mSnackbar = Snackbar.make(
requireView(),
getString(R.string.my_message),
Snackbar.LENGTH_INDEFINITE
)
private val companyFilter = object : Filter() {
override fun performFiltering(constraint: CharSequence?): FilterResults {
val filteredList = ArrayList<Item>()
if (constraint == null || constraint.isEmpty()) {
filteredList.addAll(myListFull)
} else {
val filterPattern = constraint.toString().toLowerCase().trim { it <= ' ' }
for (item in myListFull) {
if (item.Name.toLowerCase().contains(filterPattern)
) {
filteredList.add(item)
}
}
}
val results = FilterResults()
results.values = filteredList
return results
}
override fun publishResults(constraint: CharSequence?, results: FilterResults?) {
myList.clear()
myList.addAll(results!!.values as List<Item>)
notifyDataSetChanged()
}
}
private fun String.matchesIgnoreCase(otherString: String): Boolean {
return this.toLowerCase().contains(otherString.trim().toLowerCase())
}
class MyViewHolder(itemView: View) : androidx.recyclerview.widget.RecyclerView
.ViewHolder(itemView) {
var tvTitle: TextView = itemView.findViewById(R.id.title)
var tvSubtitle: TextView = itemView.findViewById(R.id.subtitle)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
val inflater = LayoutInflater.from(mCtx)
val v = inflater.inflate(R.layout.list_item, parent, false)
return MyViewHolder(v)
}
override fun getItemCount(): Int {
return myList.size
}
override fun getFilter(): Filter {
return companyFilter
}
}
类MyAdapter(
私有val mCtx:上下文,
var myList:MutableList,
):androidx.recyclerview.widget.recyclerview.Adapter(),可筛选{
private val myListFull=myList.toMutableList()
val mSnackbar=Snackbar.make(
RequireReview(),
getString(R.string.my_消息),
Snackbar.LENGTH\u不确定
)
private val companyFilter=object:Filter(){
重写fun performFiltering(约束:CharSequence?):FilterResults{
val filteredList=ArrayList()
if(constraint==null | | constraint.isEmpty()){
filteredList.addAll(myListFull)
}否则{
val filterPattern=constraint.toString().toLowerCase().trim{it尝试以下操作:
val mSnackbar = Snackbar.make((mCtx as Activity).findViewById(android.R.id.content), mCtx.getString(R.string.xxx), Snackbar.LENGTH_INDEFINITE)
视图应该是组件的根视图。因此,提供对组件片段或活动的回调,并在那里显示Snackbar。@ADM未解析引用:'requirereactivity'
未解析引用:'requirereactivity'和'getString'
@Swarthy46这很奇怪,在我的情况下可以正常工作。尝试重建项目吗?这是在n适配器,不是片段。@Swarthy46应答已更新。