First of all, I apologize for my poor English skills.
I'm a beginner in android studio. I'm implementing an app with search function added to recyclerview using searchview. However, despite using getFilter(), the search results are not displayed in the recyclerview. I don't know what my mistake is. It would be of great help if you could let me know what I'm missing.
My xml code
<com.sothree.slidinguppanel.SlidingUpPanelLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
app:umanoDragView="@id/slide_layout"
app:umanoPanelHeight="16dp"
tools:context=".MainActivity">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/first_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/inside_layout"
android:layout_width="match_parent"
android:layout_height="260dp"
android:background="#8BC34A"
app:layout_constraintBottom_toTopOf="@id/search_view"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/app_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="co-investor"
android:textSize="30dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/str_total"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="총 게시물 개수"
android:textSize="40dp"
app:layout_constraintBottom_toTopOf="@id/total"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/app_name" />
<TextView
android:id="@+id/total"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="300개"
android:textSize="50dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/str_total"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.appcompat.widget.SearchView
android:id="@+id/search_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@id/recyclerview"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/inside_layout" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="430dp"
android:paddingBottom="15dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/search_view" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.fragment.app.FragmentContainerView
android:id="@+id/slide_layout"
android:layout_width="match_parent"
android:layout_height="430dp"
android:background="#ffffff">
</androidx.fragment.app.FragmentContainerView>
</com.sothree.slidinguppanel.SlidingUpPanelLayout>
My MainActivity code
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
val coinList = ArrayList<CoinList>()
for (i in 0 until 50) {
coinList.add(CoinList("a" + i, "count : " + i))
}
val adapter = RecyclerViewAdapter(coinList, LayoutInflater.from(this@MainActivity))
val recycler_view: RecyclerView = findViewById(R.id.recyclerview)
recycler_view.adapter = adapter
recycler_view.layoutManager = LinearLayoutManager(this)
}
class CoinList(val name: String, val count: String) {
}
//RecyclerViewAdapter
class RecyclerViewAdapter(
val itemList: ArrayList<CoinList>,
val inflater: LayoutInflater
) : RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>(), Filterable {
private var searchList: ArrayList<CoinList>? = null
inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val name: TextView
val count: TextView
init {
name = itemView.findViewById(R.id.coin_name)
count = itemView.findViewById(R.id.coin_count)
}
}
init {
this.searchList = itemList
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val view = inflater.inflate(R.layout.item_view, parent, false)
return ViewHolder(view)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.name.setText(itemList.get(position).name)
holder.count.setText(itemList.get(position).count)
holder.itemView.setOnClickListener {
}
}
override fun getItemCount(): Int {
return itemList.size
}
//Filter
override fun getFilter(): Filter {
return object : Filter() {
override fun performFiltering(charSequence: CharSequence): FilterResults {
val charString = charSequence.toString()
if (charString.isEmpty()) {
searchList = itemList
} else {
val filteredList = ArrayList<CoinList>()
for (coin in itemList) {
if (coin.name.contains(charString) || coin.count.contains(charString)) {
filteredList.add(coin)
}
}
searchList = filteredList
}
val filterResults = FilterResults()
filterResults.values = searchList
return filterResults
}
override fun publishResults(
charSequence: CharSequence,
filterResults: FilterResults
) {
searchList = filterResults.values as ArrayList<CoinList>
notifyDataSetChanged()
}
}
}
}
If anyone knows what I'm doing wrong, please let me know. Thank you!! :)
