Ошибка при извлечении данных Firebase

Я пытался получить некоторые данные из своей базы данных в реальном времени firebase, как обычно, но не мог понять, где в коде меня преследовала проблема. Не могу понять, в чем проблема. Кто-нибудь может указать на это? Все будет оценено! Код прикреплен ниже - `package com.example.abed.smit;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;

public class FindMedicineActivity extends AppCompatActivity {

private Button SearchButton_medicine;
private EditText SearchInput_medicine;

private RecyclerView SearchResult_medicine;

private DatabaseReference allDocdatabaseref;

FirebaseRecyclerAdapter<FindMedicine,FindMedicineViewHolder> firebaseRecyclerAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_find_medicine);

    SearchResult_medicine = (RecyclerView) findViewById(R.id.search_result_list2);
    SearchResult_medicine.setHasFixedSize(true);
    SearchResult_medicine.setLayoutManager(new LinearLayoutManager(this));

    SearchButton_medicine =  findViewById(R.id.search_people_btn2);
    SearchInput_medicine = (EditText) findViewById(R.id.Search_box_input2);

    allDocdatabaseref = FirebaseDatabase.getInstance().getReference().child("MEDICINE");


    SearchButton_medicine.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String searchBoxInput1 = SearchInput_medicine.getText().toString().trim();

            SearchMedicine(searchBoxInput1);


        }
    });
}

private void SearchMedicine(String searchBoxInput1) {

    Toast.makeText(this, "searching..", Toast.LENGTH_LONG).show();

    Query searchmedicinequery = allDocdatabaseref.orderByChild("medicinename").startAt(searchBoxInput1).endAt(searchBoxInput1 + "\uf8ff");

    firebaseRecyclerAdapter
            = new FirebaseRecyclerAdapter<FindMedicine, FindMedicineViewHolder>(
            FindMedicine.class,
            R.layout.all_medicine_display_layout,
            FindMedicineViewHolder.class,
            searchmedicinequery

    ) {
        @Override
        protected void populateViewHolder(FindMedicineViewHolder viewHolder, FindMedicine model, int position) {
             viewHolder.setMedicinename(model.getMedicinename());
        }
    };
    SearchResult_medicine.setAdapter(firebaseRecyclerAdapter);
    firebaseRecyclerAdapter.startListening();
}

private class FindMedicineViewHolder extends RecyclerView.ViewHolder {
    View mView;

    public FindMedicineViewHolder(View itemView) {
        super(itemView);
        mView = itemView;
    }



    public void setMedicinename(String medicinename) {
        TextView Docname = mView.findViewById(R.id.all_user_profile_name2);
        Docname.setText(medicinename);
    }
}

}

Я также использую геттер ..

package com.example.abed.smit;

public class FindMedicine {

public String medicinename;

public FindMedicine(String medicinename) {
    this.medicinename = medicinename;
}

public String getMedicinename() {
    return medicinename;
}

}

образ базы данных !!! здесь

xml все allmedicine

<?xml version = "1.0" encoding = "utf-8"?>
<LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
xmlns:app = "http://schemas.android.com/apk/res-auto"
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_margin = "10dp"
android:background = "#000000">

<LinearLayout
    android:layout_width = "match_parent"
    android:layout_height = "wrap_content"
    android:orientation = "vertical"
    android:layout_margin = "5dp">

    <TextView
        android:id = "@+id/all_user_profile_name2"
        android:layout_width = "match_parent"
        android:layout_height = "wrap_content"
        android:text = "UserFullNAme"
        android:textColor = "#91DC5A"
        android:textSize = "18sp" android:textStyle = "bold"/>


</LinearLayout>


</LinearLayout>

find_medicine xml

<?xml version = "1.0" encoding = "utf-8"?>
<RelativeLayout 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"
android:background = "#000000"
tools:context = ".FindMedicineActivity">


<RelativeLayout
    android:id = "@+id/myLayout2"
    android:layout_width = "match_parent"
    android:layout_height = "wrap_content"
    android:layout_alignParentStart = "true"
    android:layout_alignParentTop = "true"
    android:layout_alignParentLeft = "true">


    <EditText
        android:id = "@+id/Search_box_input2"
        android:layout_width = "match_parent"
        android:layout_height = "wrap_content"
        android:layout_marginBottom = "20dp"
        android:layout_marginLeft = "40dp"
        android:layout_marginRight = "40dp"
        android:drawableLeft = "@drawable/ic_action_name"
        android:hint = "Enter Bmdc Number"
        android:textColor = "#FFFFFFFF"
        android:textColorHint = "#FFFFFFFF"
        android:textSize = "16sp"
        android:textStyle = "bold" />


    <Button
        android:id = "@+id/search_people_btn2"
        android:layout_width = "170dp"
        android:layout_height = "30dp"
        android:layout_alignParentStart = "true"
        android:layout_alignParentTop = "true"
        android:layout_marginStart = "94dp"
        android:layout_marginTop = "67dp"
        android:background = "@drawable/buttonshape"
        android:shadowColor = "#A8A8A8"
        android:shadowDx = "0"
        android:shadowDy = "0"
        android:shadowRadius = "5"
        android:text = "Confirm"
        android:textColor = "#FFFFFF"
        android:textSize = "20sp"
        android:layout_alignParentLeft = "true"
        android:layout_marginLeft = "94dp" />

</RelativeLayout>

<android.support.v7.widget.RecyclerView
    android:id = "@+id/search_result_list2"
    android:layout_width = "match_parent"
    android:layout_height = "match_parent"
    android:layout_alignParentLeft = "true"
    android:layout_alignParentStart = "true"
    android:layout_below = "@+id/myLayout2"
    android:layout_margin = "10dp"
    android:background = "#000000"

    >

</android.support.v7.widget.RecyclerView>

</RelativeLayout>