Searchview with recyclerview data in firebase realtime

Question

我的主页片段中有这个 Searchview，我想通过在“帖子”上搜索标题值来过滤我的 recyclerview。我已经搜索了一些教程，但大多数使用“FirebaseRecyclerOptions”，但就我而言，我使用列表的默认 RecyclerView。我的尝试都没有达到我的预期。

这是数据库结构。

"Posts": {
    "-NNsor5WiX9wxTDf7qo5": {
      "category": "Art",
      "description": "tes 123",
      "duration": "-",
      "paymentMethods": "e-wallet",
      "postId": "-NNsor5WiX9wxTDf7qo5",
      "post_image": "https://firebasestorage.googleapis.com/v0/b/final-project-idn.appspot.com/o/Posts%20Pictures%2F1675990621049.jpg?alt=media&token=f7b747c0-1efe-4f43-9ff1-729c7d99c7c1",
      "priceRange": "Rp 0 - 10.000",
      "publisher": "6FzpJ2sQC9gewbUIGHB8hiNWK1z2",
      "title": "tes"
    }
  },
  "User": {
    "6FzpJ2sQC9gewbUIGHB8hiNWK1z2": {
      "background_image": "https://firebasestorage.googleapis.com/v0/b/final-project-idn.appspot.com/o/Default%20Images%2Fimg_background.png?alt=media&token=b51e7cf5-2015-4cc4-9583-159373d081e2",
      "bio": "Member of NCT",
      "email": "[email protected]",
      "link": "",
      "profile_image": "https://firebasestorage.googleapis.com/v0/b/final-project-idn.appspot.com/o/Profile%20Pictures%2F6FzpJ2sQC9gewbUIGHB8hiNWK1z2.jpg?alt=media&token=d174fad9-2f8c-4964-83ec-549f18876587",
      "uid": "6FzpJ2sQC9gewbUIGHB8hiNWK1z2",
      "userName": "marklee"
    }
  }
}

这里是家庭片段。

class HomeFragment : Fragment(){
    private lateinit var refUsers : DatabaseReference
    private var firebaseUser: FirebaseUser? = null
    private var postAdapter: PostAdapter? = null
    private var postList: MutableList<Post>? = null
    private var dataList = ArrayList<Post>()

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val bind = FragmentHomeBinding.inflate(layoutInflater)

        bind.cvCategoryArt.setOnClickListener {
            parentFragmentManager.beginTransaction()
                .replace(R.id.mainContainer, CategoryArtFragment()).addToBackStack(null).commit()
        }

        bind.cvCategoryWriting.setOnClickListener {
            parentFragmentManager.beginTransaction()
                .replace(R.id.mainContainer, CategoryWritingFragment()).addToBackStack(null).commit()
        }

        bind.cvCategoryApplication.setOnClickListener {
            parentFragmentManager.beginTransaction()
                .replace(R.id.mainContainer, CategoryApplicationFragment()).addToBackStack(null).commit()
        }

        bind.cvCategoryDesign.setOnClickListener {
            parentFragmentManager.beginTransaction()
                .replace(R.id.mainContainer, CategoryDesignFragment()).addToBackStack(null).commit()
        }

        //RecyclerView
        var recyclerView: RecyclerView? = null
        recyclerView = bind.rvHome
        val linearLayoutManager = LinearLayoutManager(context)
        linearLayoutManager.reverseLayout = true
        linearLayoutManager.stackFromEnd = true
        recyclerView.layoutManager = linearLayoutManager

        refUsers = FirebaseDatabase.getInstance().reference.child("Posts")
        postList = ArrayList()
        dataList = ArrayList()
        val fragmentManager = parentFragmentManager
        postAdapter = context?.let { PostAdapter(it, postList as ArrayList<Post>,fragmentManager) }

        recyclerView.adapter = postAdapter

        bind.pbHomeRecycler.isVisible = true

        retrievePostHome(bind)
        return bind.root
    }


    private fun retrievePostHome(bind: FragmentHomeBinding) {
        firebaseUser = FirebaseAuth.getInstance().currentUser
        val postsRef = FirebaseDatabase.getInstance().reference.child("Posts")
        postsRef.addValueEventListener(object : ValueEventListener {
            @SuppressLint("NotifyDataSetChanged")
            override fun onDataChange(p0: DataSnapshot) {
                postList?.clear()
                bind.pbHomeRecycler.isVisible = false

                for (snapshot in p0.children){
                    val post = snapshot.getValue(Post::class.java)
                    if (post!!.getPublisher() != firebaseUser!!.uid){
                        postList!!.add(post)
                    }
                    postAdapter!!.notifyDataSetChanged()
                }
            }

            override fun onCancelled(error: DatabaseError) {

            }
        })
    }

}

这是主页片段 xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragment.HomeFragment">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/clHome"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_alignParentTop="true"
            android:layout_alignParentEnd="true">

            <ImageView
                android:id="@+id/ivHomeLogo"
                android:layout_width="50dp"
                android:layout_height="50dp"
                android:layout_marginStart="@dimen/_20dp"
                android:layout_marginTop="@dimen/_30dp"
                android:src="@drawable/app_logo"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="@font/poppins_bold"
                android:text="@string/app_name"
                android:textColor="@color/blue"
                android:textSize="26sp"
                app:layout_constraintBottom_toBottomOf="@id/ivHomeLogo"
                app:layout_constraintStart_toEndOf="@id/ivHomeLogo"
                app:layout_constraintTop_toTopOf="@id/ivHomeLogo" />

            <androidx.appcompat.widget.SearchView
                android:id="@+id/etSearch"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="20dp"
                android:layout_marginTop="20dp"
                android:layout_marginEnd="20dp"
                android:background="@drawable/bg_et_search"
                android:drawablePadding="12dp"
                android:ems="10"
                app:queryBackground="@android:color/transparent"
                android:focusable="false"
                app:iconifiedByDefault="false"
                app:queryHint="Search Post.."
                app:searchIcon="@drawable/ic_search"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/ivHomeLogo"/>

            <HorizontalScrollView
                android:id="@+id/hsvHome"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:scrollbars="none"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="@+id/etSearch"
                app:layout_constraintTop_toBottomOf="@+id/etSearch">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <LinearLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="@dimen/_10dp"
                        android:orientation="vertical">

                        <androidx.cardview.widget.CardView
                            android:id="@+id/cvCategoryArt"
                            android:layout_width="match_parent"
                            android:layout_height="match_parent"
                            app:cardBackgroundColor="@color/blue"
                            app:cardCornerRadius="@dimen/_10dp">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_marginHorizontal="40dp"
                                android:layout_marginVertical="8dp"
                                android:fontFamily="@font/poppins_semibold"
                                android:text="Art"
                                android:textColor="@color/white"
                                android:textSize="16sp" />
                        </androidx.cardview.widget.CardView>

                    </LinearLayout>

                    <LinearLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="@dimen/_10dp"
                        android:orientation="vertical">

                        <androidx.cardview.widget.CardView
                            android:id="@+id/cvCategoryWriting"
                            android:layout_width="match_parent"
                            android:layout_height="match_parent"
                            app:cardBackgroundColor="@color/blue_light"
                            app:cardCornerRadius="@dimen/_10dp">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_marginHorizontal="40dp"
                                android:layout_marginVertical="8dp"
                                android:fontFamily="@font/poppins_semibold"
                                android:text="Writing"
                                android:textColor="@color/blue"
                                android:textSize="16sp" />
                        </androidx.cardview.widget.CardView>

                    </LinearLayout>

                    <LinearLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="@dimen/_10dp"
                        android:orientation="vertical">

                        <androidx.cardview.widget.CardView
                            android:id="@+id/cvCategoryApplication"
                            android:layout_width="match_parent"
                            android:layout_height="match_parent"
                            app:cardBackgroundColor="@color/blue"
                            app:cardCornerRadius="@dimen/_10dp">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_marginHorizontal="40dp"
                                android:layout_marginVertical="8dp"
                                android:fontFamily="@font/poppins_semibold"
                                android:text="Application"
                                android:textColor="@color/white"
                                android:textSize="16sp" />
                        </androidx.cardview.widget.CardView>

                    </LinearLayout>

                    <LinearLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:paddingEnd="@dimen/_20dp">

                        <androidx.cardview.widget.CardView
                            android:id="@+id/cvCategoryDesign"
                            android:layout_width="match_parent"
                            android:layout_height="match_parent"
                            android:layout_marginEnd="@dimen/_20dp"
                            app:cardBackgroundColor="@color/blue_light"
                            app:cardCornerRadius="@dimen/_10dp">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_marginHorizontal="40dp"
                                android:layout_marginVertical="8dp"
                                android:fontFamily="@font/poppins_semibold"
                                android:text="Design"
                                android:textColor="@color/blue"
                                android:textSize="16sp" />
                        </androidx.cardview.widget.CardView>

                    </LinearLayout>

                </LinearLayout>

            </HorizontalScrollView>

        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rvHome"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/clHome"
            android:layout_alignParentStart="true"
            android:layout_alignParentEnd="true"
            android:layout_marginTop="@dimen/_10dp"
            tools:listitem="@layout/item_timeline" />

    </RelativeLayout>

    <ProgressBar
        android:id="@+id/pbHomeRecycler"
        android:layout_width="wrap_content"
        android:layout_gravity="center"
        android:layout_height="wrap_content" />

</FrameLayout>

这是帖子的适配器。

class PostAdapter(
    private val mContext: Context,
    private var mPost: List<Post>,
    private val mParentFragmentManager: FragmentManager,
) : RecyclerView.Adapter<PostAdapter.ViewHolder>() {
    private var firebaseUser: FirebaseUser? = null

    inner class ViewHolder(@NonNull itemView: View) : RecyclerView.ViewHolder(itemView) {
        var profileImage: CircleImageView
        var tvUsername: TextView
        var likeButton: ImageView
        var tvTitle: TextView
        var tvPrice: TextView
        var tvDescription: TextView
        var tvSeeMore: TextView
        var postImage: ImageView
        var postCard : CardView

        init {
            profileImage = itemView.findViewById(R.id.cvProfile)
            tvUsername = itemView.findViewById(R.id.tvCvUsername)
            likeButton = itemView.findViewById(R.id.cvFav)
            tvTitle = itemView.findViewById(R.id.tvCvTitle)
            tvPrice = itemView.findViewById(R.id.tvCvPrice)
            tvDescription = itemView.findViewById(R.id.tvCvDesc)
            tvSeeMore = itemView.findViewById(R.id.tvCvSeeMore)
            postImage = itemView.findViewById(R.id.ivPostImage)
            postCard = itemView.findViewById(R.id.cvImagePost)

            tvSeeMore.setOnClickListener{
                val publisherId = mPost[adapterPosition].getPublisher()
                val postId = mPost[adapterPosition].getPostId()

                mParentFragmentManager.beginTransaction()
                    .replace(R.id.mainContainer, DetailPostFragment(publisherId, postId)).addToBackStack(null).commit()
            }

            profileImage.setOnClickListener {
                firebaseUser = FirebaseAuth.getInstance().currentUser

                val publisherId = mPost[adapterPosition].getPublisher()
                val postId = mPost[adapterPosition].getPostId()

                if (publisherId != firebaseUser!!.uid){
                    mParentFragmentManager.beginTransaction()
                        .replace(R.id.mainContainer, ProfileFragment(publisherId, postId)).addToBackStack(null).commit()
                }

            }
        }
    }



    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(mContext).inflate(R.layout.item_timeline, parent, false)
        return ViewHolder(view)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        firebaseUser = FirebaseAuth.getInstance().currentUser
        val post = mPost[position]

        if (post.getPost_image() == ""){
            holder.postCard.isVisible = false
        }else{
            Glide.with(mContext.applicationContext).load(post.getPost_image()).into(holder.postImage)
        }

        holder.tvTitle.text = post.getTitle()
        holder.tvDescription.text = post.getDescription()
        holder.tvPrice.text = post.getPriceRange()

        publisherInfo(holder.profileImage, holder.tvUsername, post.getPublisher())
    }

    private fun publisherInfo(
        profileImage: CircleImageView,
        tvUsername: TextView,
        publisher: String
    ) {
        val usersRef = FirebaseDatabase.getInstance().reference.child("User").child(publisher)

        usersRef.addValueEventListener(object : ValueEventListener {
            override fun onDataChange(snapshot: DataSnapshot) {
                if (snapshot.exists()) {
                    val user = snapshot.getValue(Users::class.java)

                    Glide.with(mContext.applicationContext).load(user!!.getProfile_image())
                        .into(profileImage)
                    tvUsername.text = user!!.getUserName()
                }
            }

            override fun onCancelled(error: DatabaseError) {

            }

        })
    }

    override fun getItemCount(): Int {
        return mPost.size
    }

}

任何建议或解决方案？我真的很感激。谢谢