Ошибка при отображении данных с помощью TextView.setText: Resources $ NotFoundException: строковый идентификатор ресурса # 0x0 - PullRequest
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Ошибка при отображении данных с помощью TextView.setText: Resources $ NotFoundException: строковый идентификатор ресурса # 0x0

0 голосов
/ 26 февраля 2020

Это мой класс адаптера: - 

public class adapter_cgpa extends RecyclerView.Adapter<adapter_cgpa.Viewholder> {

    ArrayList<POJO> cgpaArrayList;



    public adapter_cgpa(ArrayList<POJO> cgpaArrayList) {
        this.cgpaArrayList = cgpaArrayList;
    }

    @NonNull
    @Override
    public adapter_cgpa.Viewholder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        View listitem = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_cgpa, parent, false);
        return new Viewholder(listitem);

    }

    @Override
    public void onBindViewHolder(@NonNull adapter_cgpa.Viewholder holder, int position) {

        POJO cgpa= cgpaArrayList.get(position);
        holder.cname.setText(cgpa.getCname());
        holder.no_of_sems.setText(cgpa.getNo_of_sems());
        holder.cgpa.setText(cgpa.getCgpa());
        holder.percentage.setText(cgpa.getPercentage());
        holder.schemec.setText(cgpa.getSchemec());


    }

    @Override
    public int getItemCount() {
        return cgpaArrayList.size();
    }

    public class Viewholder extends RecyclerView.ViewHolder {

        TextView cname, no_of_sems, cgpa, percentage,schemec;
        ImageButton btndelete2;


        public Viewholder(@NonNull View itemView) {
            super(itemView);

            cname=(TextView)itemView.findViewById(R.id.name);
            no_of_sems=(TextView)itemView.findViewById(R.id.no_of_sem);
            cgpa=(TextView)itemView.findViewById(R.id.textView49);
            percentage=(TextView)itemView.findViewById(R.id.textView55);
            schemec=(TextView)itemView.findViewById(R.id.scheme2);
            btndelete2=(ImageButton)itemView.findViewById(R.id.btndelete2);

            btndelete2.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    dbmanager db= new dbmanager(v.getContext());
                    db.delete2();
                    Toast.makeText(v.getContext(), "Data deleted successfully", Toast.LENGTH_SHORT).show();

                }
            });

        }


    }

}

Это мой фрагмент, который похож на мой основной класс: - 

public class cgpa_frag extends Fragment {

RecyclerView recyclerview;
adapter_cgpa ac;
TextView else1;

ArrayList<POJO> cgpaArrayList = new ArrayList<>();


public cgpa_frag() {
    // Required empty public constructor
}


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_cgpa_frag, container, false);
    recyclerview=(RecyclerView) view.findViewById(R.id.rc2);
    else1=(TextView) view.findViewById(R.id.else1);
    cgpaArrayList= new ArrayList<>();
    ac= new adapter_cgpa(cgpaArrayList);
    recyclerview.setLayoutManager(new LinearLayoutManager(getContext(), RecyclerView.VERTICAL,true));
    recyclerview.setAdapter(ac);


    Fetchdata2();
    return view;
}
private void Fetchdata2()
{
    dbmanager db= new dbmanager(getContext());

    Cursor cursor= db.fetch_data2();

    if (cursor!= null){

        cursor.moveToFirst();

        while (cursor.moveToNext()){
            //ModelDetail cd= new ModelDetail(cursor.getString(1),cursor.getString(2),cursor.getString(3),cursor.getString(4));

            POJO pj= new POJO();
            pj.setCname(cursor.getString(0));
            pj.setNo_of_sems(cursor.getInt(1));
            pj.setCgpa(cursor.getInt(2));
            pj.setPercentage(cursor.getInt(3));
            pj.setSchemec(cursor.getInt(4));
            cgpaArrayList.add(pj);
        }

        ac= new adapter_cgpa(cgpaArrayList);
        recyclerview.setAdapter(ac);
    }
    else{

        else1.setVisibility(View.VISIBLE);
    }
}

}

Ниже мой recycler_cgpa. xml file: 

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textStyle="bold"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.2"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.3" />

            <TextView
                android:id="@+id/no_of_sem"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.15"
                app:layout_constraintStart_toEndOf="@+id/name"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.3" />

            <TextView
                android:id="@+id/sgpae"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="CGPA"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.2"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.7" />

            <TextView
                android:id="@+id/perce"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Percentage"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.6"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.70" />

            <TextView
                android:id="@+id/textView49"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="@+id/sgpae"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.08"
                app:layout_constraintStart_toEndOf="@+id/sgpae"
                app:layout_constraintTop_toTopOf="@+id/sgpae"
                app:layout_constraintVertical_bias="0.0" />

            <TextView
                android:id="@+id/textView55"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toBottomOf="@+id/perce"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.08"
                app:layout_constraintStart_toEndOf="@+id/perce"
                app:layout_constraintTop_toTopOf="@+id/perce" />

            <TextView
                android:id="@+id/scheme2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="10sp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.95"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.95" />

            <ImageButton
                android:id="@+id/btndelete2"
                android:layout_width="30dp"
                android:layout_height="40dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.96"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.05"
                app:srcCompat="@android:drawable/ic_menu_delete" />

        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.cardview.widget.CardView>
</LinearLayout>

Это мой класс POJO: 

public class POJO {

String sname, cname,semester ;
int sgpa ,percent, cgpa, percentage, schemes, schemec, no_of_sems ;

public POJO() {
    this.sname = sname;
    this.cname = cname;
    this.semester = semester;
    this.no_of_sems = no_of_sems;
    this.sgpa = sgpa;
    this.percent = percent;
    this.cgpa = cgpa;
    this.percentage = percentage;
    this.schemes = schemes;
    this.schemec = schemec;
}

public String getSname() {
    return sname;
}

public String getCname() {
    return cname;
}

public void setSname(String sname) {
    this.sname = sname;
}

public void setCname(String cname) {
    this.cname = cname;
}

public void setSemester(String semester) {
    this.semester = semester;
}


public void setNo_of_sems(int no_of_sems) {
    this.no_of_sems = no_of_sems;
}

public void setSgpa(int sgpa) {
    this.sgpa = sgpa;
}

public void setPercent(int percent) {
    this.percent = percent;
}

public void setCgpa(int cgpa) {
    this.cgpa = cgpa;
}

public void setPercentage(int percentage) {
    this.percentage = percentage;
}

public void setSchemes(int schemes) {
    this.schemes = schemes;
}

public void setSchemec(int schemec) {
    this.schemec = schemec;
}

public String getSemester() {
    return semester;
}

public int getNo_of_sems() {
    return no_of_sems;
}

public int getSgpa() {
    return sgpa;
}

public int getPercent() {
    return percent;
}

public int getCgpa() {
    return cgpa;
}

public int getPercentage() {
    return percentage;
}

public int getSchemes() {
    return schemes;
}

public int getSchemec() {
    return schemec;
}

}

Это мой класс dbmanager: 

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import androidx.annotation.Nullable;

public class dbmanager extends SQLiteOpenHelper {

    String sgpa_table="create table Sgpa (sname text, semester text, sgpa  int,percent int, schemes int, primary key(sname,semester,schemes))";
    String cgpa_table="create table Cgpa (cname text, no_of_sems int, cgpa int, percentage int, schemec int, primary key(cname,no_of_sems,schemec))";

    public dbmanager(@Nullable Context context) {
        super(context, "Student", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(sgpa_table);
        db.execSQL(cgpa_table);

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }

    public void delete1(){
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "delete FROM Sgpa " ;
        onCreate(db);
        db.execSQL(query);
        //  Cursor cursor = db.rawQuery(query,null);
        db.close();
    }

    public void delete2(){
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "delete FROM Cgpa " ;
        onCreate(db);
        db.execSQL(query);
        //  Cursor cursor = db.rawQuery(query,null);
        db.close();
    }

    public Cursor fetch_data1() {
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "Select*FROM Sgpa" ;
        Cursor cursor = db.rawQuery(query,null);
//        if (cursor != null) {
//            cursor.moveToFirst();
//        }
        return cursor;
    }

    public Cursor fetch_data2() {
        SQLiteDatabase db = this.getWritableDatabase();
        String query = "Select*FROM Cgpa" ;
        Cursor cursor = db.rawQuery(query,null);
//        if (cursor != null) {
//            cursor.moveToFirst();
//        }
        return cursor;
    }
}

Я не могу определить ошибку. Logcat указывает на ошибку в классе адаптера в этих двух строках: 

public class adapter_cgpa extends RecyclerView.Adapter<adapter_cgpa.Viewholder> {

и holder.no_of_sems.setText(cgpa.getNo_of_sems());

и записывает android .content.res.Resources $ NotFoundException: строковый идентификатор ресурса # 0x0

1 Ответ

1 голос
/ 26 февраля 2020

Вы случайно вызываете версию TextView.setText, которая принимает int идентификатор ресурса .

. Вы должны явно преобразовать его в String: 

holder.no_of_sems.setText(Integer.toString(cgpa.getNo_of_sems()));
...