null при считывании данных из базы данных

Имеется код:

package asus.example.com.fitnessapp;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * A simple {@link Fragment} subclass.
 */
public class IndicationsFragment extends Fragment {
    private EditText pulse;
    private Button save;
    private TextView textView;
    private final String LOG_TAG = "myLogs";
    private DBHelper dbHelper;
    private int iPulse, iDate, iMonth, iYear;
    public IndicationsFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_indications, container, false);
        pulse = view.findViewById(R.id.pulse);
        save = view.findViewById(R.id.save);
        final Date date = new Date();
        dbHelper = new DBHelper(getActivity());
        save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    iPulse = Integer.parseInt(pulse.getText().toString());
                    iDate = date.getDate();
                    iMonth = date.getMonth()+1;
                    iYear = date.getYear()+1900;
                    ContentValues cv = new ContentValues();
                    SQLiteDatabase db = dbHelper.getWritableDatabase();
                    cv.put("pulse", iPulse);
                    cv.put("date", iDate);
                    cv.put("month", iMonth);
                    cv.put("year", iYear);
                    long rowID = db.insert("myTable", null,cv);
                    Log.d(LOG_TAG, "Row inserted, ID = "+rowID);
                    Toast.makeText(getContext(), "Information saved", Toast.LENGTH_LONG).show();
                    Log.d(LOG_TAG, "--- Rows in myTable: ---");
                    Cursor cursor = db.query("myTable",null,null,null,null,null,null);
                    if (cursor.moveToFirst()){
                        int idColIndex = cursor.getColumnIndex("id");
                        int idColPulse = cursor.getColumnIndex("pulse");
                        int dateColIndex = cursor.getColumnIndex("date");
                        int monthColIndex = cursor.getColumnIndex("month");
                        int yearColIndex = cursor.getColumnIndex("year");
                        ArrayList<Integer> pulses = new ArrayList<>();
                        ArrayList<Calendar> dates = new ArrayList<>();
                        do{
                            pulses.add(cursor.getInt(idColPulse));
                            dates.add(new GregorianCalendar(cursor.getInt(yearColIndex), cursor.getInt(monthColIndex), cursor.getInt(dateColIndex)));
                        }while (cursor.moveToNext());
                        cursor.close();
                        dbHelper.close();
                        for (int i = 0;i<pulses.size();i++){
                            textView.append(pulses.get(i) +"\n");
                        }
                    }
                }catch (NumberFormatException e){
                    Toast.makeText(getContext(),"Wrong input!", Toast.LENGTH_SHORT).show();
                }

            }
        });
        return view;
    }
    public class DBHelper extends SQLiteOpenHelper {
        DBHelper(Context context){
            super(context,"myDB", null, 1);
        }
        @Override
        public void onCreate(SQLiteDatabase db) {
            Log.d(LOG_TAG, "onCreate Database");
            db.execSQL("create table myTable ("+"id integer primary key autoincrement,"+
                    "pulse integer,"+"date integer,"+"month integer,"+"year integer"+");");
        }
        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        }
    }

}

При считывании данных из бд и добавлении в textView выдает ошибку:

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.append(java.lang.CharSequence)' on a null object reference at asus.example.com.fitnessapp.IndicationsFragment$1.onClick(IndicationsFragment.java:87) at android.view.View.performClick(View.java:6597) at android.view.View.performClickInternal(View.java:6574) at android.view.View.access$3100(View.java:778) at android.view.View$PerformClick.run(View.java:25885) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Хотя бд не пуста и содержит данные