如何解决使用改造android的searchview
我指的是this tutorial。 一切运行正常，没有错误，但未过滤 当我输入任何东西时。它不会过滤列表。
我不知道我在做什么错。
以下是我的适配器和活动代码。
适配器代码
class Table_Adapter(val context: Context) : RecyclerView.Adapter<Table_Adapter.MyViewHolder>(),Filterable {
var mFilteredList: MutableList<Tabledata> = mutableListOf()
var Tablelist: MutableList<Tabledata> = mutableListOf()
override fun onCreateViewHolder(parent: ViewGroup,viewType: Int): MyViewHolder {
val view = LayoutInflater.from(parent.context).inflate(
R.layout.table_recycle_item,parent,false
)
return MyViewHolder(view)
}
override fun getItemCount(): Int {
return Tablelist.size
}
override fun onBindViewHolder(holder: MyViewHolder,position: Int) {
holder.productname.text = Tablelist.get(position).name
holder.producername.text = Tablelist.get(position).producer
holder.productprice.text = Tablelist.get(position).cost.toString()
Glide.with(context).load(Tablelist.get(position).product_images)
.into(holder.image)
holder.rate.setRating(Tablelist.get(position).rating.toFloat());
holder.itemView!!.setOnClickListener {
val context:Context=holder.itemView.context
val i=Intent(
context,Product_details::class.java
)
i.putExtra("id",Tablelist.get(position).id.toString())
i.putExtra("image",Tablelist.get(position).product_images)
context.startActivity(i)
}
}
fun setMovieListItems(movieList: MutableList<Tabledata>){
this.Tablelist = movieList;
notifyDataSetChanged()
}
class MyViewHolder(itemView: View?) : RecyclerView.ViewHolder(itemView!!) {
val productname: TextView = itemView!!.findViewById(R.id.title)
val producername: TextView = itemView!!.findViewById(R.id.title1)
val productprice: TextView = itemView!!.findViewById(R.id.title2)
val rate: RatingBar=itemView!!.findViewById(R.id.ratingbar)
val image: ImageView = itemView!!.findViewById(R.id.image)
}
override fun getFilter(): Filter {
return object : Filter() {
override fun performFiltering(charSequence: CharSequence): FilterResults? {
val charString = charSequence.toString()
if (charString.isEmpty()) {
mFilteredList = Tablelist
} else {
val filteredList: MutableList<Tabledata> = ArrayList()
for (androidVersion in Tablelist) {
/* if (androidVersion.name.toLowerCase()
.contains(charString)
) {
filteredList.add(androidVersion)
}*/
if (androidVersion.name.toLowerCase()
.contains(charString.toLowerCase()) || androidVersion.name
.contains(charSequence)
) {
filteredList.add(androidVersion)
}
}
mFilteredList = filteredList
}
val filterResults = FilterResults()
filterResults.values = mFilteredList
return filterResults
}
override fun publishResults(charSequence: CharSequence?,filterResults: FilterResults) {
mFilteredList = filterResults.values as MutableList<Tabledata>
notifyDataSetChanged()
}
}
}
}
活动：
class Tables : AppCompatActivity() {
lateinit var recyclerView: RecyclerView
lateinit var recyclerAdapter: Table_Adapter
var Tablelist : MutableList<Tabledata> = mutableListOf()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.table_activity)
var mActionBarToolbar = findViewById<androidx.appcompat.widget.Toolbar>(R.id.toolbartable);
setSupportActionBar(mActionBarToolbar);
if (getSupportActionBar() != null){
getSupportActionBar()?.setDisplayHomeAsUpEnabled(true);
getSupportActionBar()?.setDisplayShowHomeEnabled(true);
getSupportActionBar()?.setHomeAsUpIndicator(R.drawable.ic_keyboard_arrow_left_black_24dp);
getSupportActionBar()?.setTitle((Html.fromHtml("<font color=\"#FFFFFF\">" + getString(R.string.Tables) + "</font>")));
}
recyclerView = findViewById(R.id.recyleview)
recyclerAdapter = Table_Adapter(this)
recyleview.layoutManager = LinearLayoutManager(this)
recyclerView.addItemDecoration(
DividerItemDecoration(
recyclerView.context,DividerItemDecoration.VERTICAL
)
)
recyleview.adapter = recyclerAdapter
RetrofitClient.instancetable.getAllPhotos(product_category_id = "1",value = 1).enqueue(
object : Callback<Table_response> {
override fun onFailure(call: Call<Table_response>,t: Throwable) {
Toast.makeText(applicationContext,"falied",Toast.LENGTH_LONG).show()
}
override fun onResponse(
call: Call<Table_response>,response: Response<Table_response>
) {
if (response?.body() != null) {
recyclerAdapter.setMovieListItems((response.body()?.data as MutableList<Tabledata>?)!!)
}
}
})
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
return when (item.itemId) {
android.R.id.home -> {
NavUtils.navigateUpFromSameTask(this)
true
}
else -> super.onOptionsItemSelected(item)
}
}
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.menu_main,menu)
val search: MenuItem = menu.findItem(R.id.search)
val searchView: SearchView = MenuItemCompat.getActionView(search) as SearchView
search(searchView)
return true
}
override fun onBackPressed() {
super.onBackPressed()
}
private fun search(searchView: SearchView) {
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String): Boolean {
return false
}
override fun onQueryTextChange(newText: String): Boolean {
recyclerAdapter.getFilter().filter(newText)
return true
}
})
}
}
谢谢。
解决方法
搜索视图查询不会产生过滤列表，因为您没有使用过滤列表。
onBindViewHolder和getItemCount仅使用Tablelist变量。 mFilteredList仅保存过滤后的结果，不使用它们。
按当前方式存储原始列表，但是将Tablelist和mFilteredList中的onBindViewHolder替换为getItemCount。另外，还需要对setMovieListItems进行较小的更新。 mFilteredList也被声明为不可变的。 performFiltering也有所改进，而且并不短。一切都显示在下面：
class Table_Adapter() : RecyclerView.Adapter<Table_Adapter.MyViewHolder>(),Filterable {
var mFilteredList: List<Tabledata> = listOf()
var tableList: MutableList<Tabledata> = mutableListOf()
...
override fun getItemCount(): Int {
return mFilteredList.size
}
override fun onBindViewHolder(holder: MyViewHolder,position: Int) {
val tableItem = mFilteredList.get(position)
holder.productname.text = tableItem.name
holder.producername.text = tableItem.producer
holder.productprice.text = tableItem.cost.toString()
Glide.with(holder.itemView!!.context).load(tableItem.product_images)
.into(holder.image)
holder.rate.setRating(tableItem.rating.toFloat());
holder.itemView!!.setOnClickListener {
val context: Context = holder.itemView.context
val i = Intent(
context,Product_details::class.java
)
i.putExtra("id",tableItem.id.toString())
i.putExtra("image",tableItem.product_images)
context.startActivity(i)
}
}
fun setMovieListItems(movieList: MutableList<Tabledata>) {
tableList = movieList.toMutableList() // makes a copy
mFilteredList = movieList
notifyDataSetChanged()
}
...
override fun getFilter(): Filter {
return object : Filter() {
override fun performFiltering(charSequence: CharSequence): FilterResults? {
val queryString = charSequence.toString()
val filterResults = FilterResults()
filterResults.values =
if (queryString.isEmpty()) {
tableList
} else {
tableList.filter {
it.name.contains(queryString,ignoreCase = true) || it.name.contains(charSequence)
}
}
return filterResults
}
override fun publishResults(charSequence: CharSequence?,filterResults: FilterResults) {
mFilteredList = filterResults.values
notifyDataSetChanged()
}
}
}
}
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