如何解决带有回收器视图的搜索视图在 Fragment 中不起作用
我在 Fragment 中使用 RecyclerView 实现了搜索视图。问题是，当我按下搜索并输入产品时，没有结果。在尝试了几乎所有找到的东西之后，我处理这个问题已经超过 2 周了。这是我的搜索片段代码：
class SearchFragment : Fragment(R.layout.fragment_search) {
val s = ArrayList<NewShoe>()
val displays=ArrayList<NewShoe>()
lateinit var adapter:AdapterSearch
var sp=ArrayList<Spec>()
override fun onCreate(savedInstanceState: Bundle?) {
setHasOptionsMenu(true)
super.onCreate(savedInstanceState)
}
override fun onViewCreated(view: View,savedInstanceState: Bundle?) {
val recyclerView= view?.findViewById<RecyclerView>(R.id.recyclerViewSearch)
recyclerView.layoutManager= GridLayoutManager(this.context?.applicationContext,2)
recyclerView.isNestedScrollingEnabled=false
recyclerView.setHasFixedSize(true)
searchView.setOnQueryTextListener(object :SearchView.OnQueryTextListener{
override fun onQueryTextSubmit(query: String?): Boolean {
println("here1")
return false
}
override fun onQueryTextChange(newText: String?): Boolean {
adapter.filter.filter(newText)
println("here2")
println(adapter.filter.filter(newText).toString())
return true
}
})
addList()
super.onViewCreated(view,savedInstanceState)
}
fun addList()
{
sp.add(Spec(R.drawable.shield,"Anti-pollution,anti-dust"))
sp.add(Spec(R.drawable.crossing,"Reusable"))
sp.add(Spec(R.drawable.happy_face,"Pleated at sides for extra comfort"))
sp.add(Spec(R.drawable.sun,"Wider face coverage for maximum \n" + "protection"))
s.add(
NewShoe(
R.drawable.air_max_london,"Nike air max 1","LONDON",289,"",arrayListOf(39,40,41),arrayListOf(
Spec(0,anti-dust"),Spec(0,"Reusable"),"Pleated at sides for extra comfort"),"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.air_max_1_have_a_nikeday,"Have A Nike Day",149,"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.limeade,"Limeade",209,"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.jordan_canyon,"Jordan 1 mid","\" Canyon Rust\"",230,"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.jordan_particle,"SE Particle Beige",210,"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.jordan_yellow,"SE Voltage Yellow",170,"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.airmax_90_crock,"Nike airmax 90","Croc",190,"Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.dance_floor_green,"90S Dancefloor Green","Wider face coverage for maximum \n" +
"protection ")
))
)
s.add(
NewShoe(
R.drawable.duck_camo,"Duck Camo Orange",140,"Wider face coverage for maximum \n" +
"protection ")
))
)
displays.addAll(s)
val recyclerView= view?.findViewById<RecyclerView>(R.id.recyclerViewSearch)
recyclerView?.adapter= AdapterSearch(s,object: AdapterSearch.OnClickListener{
override fun onItemClick(position: Int) {
val i= Intent(activity,BuyingProducts::class.java)
i.putExtra("price",s[position].price)
i.putExtra("name",s[position].name)
i.putExtra("model",s[position].model)
i.putExtra("sizes",s[position].sizes)
i.putExtra("picture",s[position].image)
i.putExtra("spec",sp)
startActivity(i)
}
})
}
}
在适配器中我实现了过滤器方法，创建了一个新的数组列表。适配器代码：
class AdapterSearch(private var li:ArrayList<NewShoe>,val onClickListener:OnClickListener):
RecyclerView.Adapter<RecyclerView.ViewHolder>(),Filterable
{
var search=ArrayList<NewShoe>()
lateinit var mcontext: Context
interface OnClickListener
{
fun onItemClick(position:Int)
}
class ShoeHolder(itemView: View): RecyclerView.ViewHolder(itemView)
init {
search=li
}
override fun onCreateViewHolder(parent: ViewGroup,viewType: Int): RecyclerView.ViewHolder {
val searchView= LayoutInflater.from(parent.context.applicationContext).inflate(R.layout.card_jordan,parent,false)
val sch = ShoeHolder(searchView)
mcontext = parent.context
return sch
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder,position: Int) {
holder.apply {
search[position].image?.let {
itemView.findViewById<ImageView>(R.id.jordan_image).setImageResource(it)
}
itemView.findViewById<TextView>(R.id.jordan_name).text=search[position].name
itemView.findViewById<TextView>(R.id.jordan_model).text=search[position].model
itemView.findViewById<TextView>(R.id.price_jordan).text=search[position].price.toString()
}
holder.itemView.setOnClickListener {
onClickListener.onItemClick(position)
}
}
override fun getItemCount(): Int {
return search.size
}
override fun getFilter(): Filter {
return object : Filter() {
override fun performFiltering(constraint: CharSequence?): FilterResults {
val queryString = constraint.toString()
if(queryString.isEmpty())
search=li
else {
val resultList=ArrayList<NewShoe>()
for(it in li)
{
if(it.name.toLowerCase(Locale.ROOT)
.contains(queryString.toLowerCase()) || it.price.toString()
.contains(queryString.toLowerCase()) ||
it.model.toLowerCase(Locale.ROOT)
.contains(queryString.toLowerCase()))
resultList.add(it)
}
search=resultList
}
val filterResults = FilterResults()
filterResults.values = search
return filterResults
}
override fun publishResults(charSequence: CharSequence?,filterResults: FilterResults) {
search = filterResults.values as ArrayList<NewShoe>
notifyDataSetChanged()
}
}
}
}
解决方法
您的适配器中的 notifyDataSetChanged() 可能不起作用。看看这篇文章了解更多信息： Android: notifyDataSetChanged(); not working
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