Hello please help me I have asked multiple experts for help about my android studio api $27$ code which is about a gps and they never actually fix my problem. The class "DatabaseHelper" is never used. Please look at the picture and you will see the errors that must be fixed. Make sure databasehelper class is called in mainactivy.java properly.

mainactivity.java:

package com.example.gpslocationapp;

import android.Manifest;

import android.annotation.SuppressLint;

import android.content.pm$.$PackageManager;

import android.location.Location;

import android.location.LocationListener;

import android.location.LocationManager;

import android.os$.$Bundle;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import androidx.annotation.NonNull;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.app.ActivityCompat;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity $\{$

private LocationManager locationManager;

private DatabaseHelper dbHelper;

private TextView tvLocationDetails;

private ListView locationListView;

private ArrayList locationList;

@Override

protected void onCreate$($Bundle savedInstanceState$)\{$

super.onCreate$($savedInstanceState$)$;

setContentView$($R$.$layout.activity$\_$main$)$;

$//$ This will initialize views and database helper

tvLocationDetails $=$ findViewById$($R$.$id$.$tvLocationDetails$)$;

Button btnRecordLocation $=$ findViewById$($R$.$id$.$btnRecordLocation$)$;

locationListView $=$ findViewById$($R$.$id$.$locationListView$)$;

dbHelper $=$ new DatabaseHelper$($this$)$;

$//$ Setup of the location list

locationList $=$ new ArrayList;

ArrayAdapter adapter $=$ new ArrayAdapter

this,

android.R$.$layout.simple$\_$list$\_$item$\_1,$

locationList

$)$;

locationListView.setAdapter$($adapter$)$;

$//$ This will initialize Location Manager

locationManager $=($LocationManager$)$ getSystemService$($LOCATION$\_$SERVICE$)$;

$//$ This is the button click to record location

btnRecordLocation.setOnClickListener$($v $->\{$

if $($ActivityCompat$.$checkSelfPermission$($this$,$ Manifest.permission.ACCESS$\_$FINE$\_$LOCATION$)!=$ PackageManager.PERMISSION$\_$GRANTED &&

ActivityCompat.checkSelfPermission$($this$,$ Manifest.permission.ACCESS$\_$COARSE$\_$LOCATION$)!=$ PackageManager.PERMISSION$\_$GRANTED$)\{$

ActivityCompat.requestPermissions$($this$,$ new String$[]\{$Manifest$.$permission.ACCESS$\_$FINE$\_$LOCATION$\},1)$;

return;

$\}$

locationManager.requestLocationUpdates$($LocationManager$.$GPS$\_$PROVIDER, $0,0,$ locationListener$)$;

$\})$;

$\}$

private final LocationListener locationListener $=$ new LocationListener$()\{$

@SuppressLint$("$SetTextI$18$n$")$

@Override

public void onLocationChanged$($Location location$)\{$

double latitude $=$ location.getLatitude$()$;

double longitude $=$ location.getLongitude$()$;

$//$ Show the coordinates

tvLocationDetails.setText$("$Lat: $"+$ latitude $+",$ Lon: $"+$ longitude$)$;

$//$ Save to the database

dbHelper.insertLocation$($latitude$,$ longitude$)$;

$//$ Add to the location list $($for display$)$

locationList.add$("$Lat: $"+$ latitude $+",$ Lon: $"+$ longitude$)$;

$(($ArrayAdapter$)$ locationListView.getAdapter$()).$notifyDataSetChanged$()$;

Toast.makeText$($MainActivity$.$this, "Location Recorded", Toast.LENGTH$\_$SHORT$).$show$()$;

$\}$

@Override

public void onStatusChanged$($String provider, int status, Bundle extras$)\{\}$

@Override

public void onProviderEnabled$($@NonNull String provider$)\{\}$

@Override

public void onProviderDisabled$($@NonNull String provider$)\{\}$

$\}$;

$\}$

databasehelper.java:

package com.example.gpslocationapp;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

public class DatabaseHelper extends SQLiteOpenHelper $\{$

private static final String DATABASE$\_$NAME $=$ "locations.db$"$;

private static final int DATABASE$\_$VERSION $=1$;

public static final String TABLE$\_$LOCATIONS $=$ "locations";

public static final String COLUMN$\_$ID $="\_$id$"$;

public static final String COLUMN$\_$LAT $=$ "latitude";

public static final String COLUMN$\_$LON $=$ "longitude";

public DatabaseHelper$($Context context$)\{$

super$($context$,$ DATABASE$\_$NAME, null, DATABASE$\_$VERSION$)$;

$\}$

@Override

public void onCreate$($SQLiteDatabase db$)\{$

String CREATE$\_$TABLE $=$ "CREATE TABLE $"+$ TABLE$\_$LOCATIONS $+"("+$

COLUMN$\_$ID $+"$ INTEGER PRIMARY KEY AUTOINCREMENT, $"+$

COLUMN$\_$LAT $+"$ REAL, $"+$

COLUMN$\_$LON $+"$ REAL$)"$;

db$.$execSQL$($CREATE$\_$TABLE$)$;

$\}$

@Override

public void onUpgrade$($SQLiteDatabase db$,$ int oldVersion, int newVersion$)\{$

db$.$execSQL$("$DROP TABLE IF EXISTS $"+$ TABLE$\_$LOCATIONS$)$;

onCreate$($db$)$;

$\}$

public void insertLocation$($double latitude, double longitude$)\{$

SQLiteDatabase db $=$ this.getWritableDatabase$()$;

ContentValues values $=$ new ContentValues$()$;

values.put$($COLUMN$\_$LAT, latitude$)$;

values.put$($COLUMN$\_$LON, longitude$)$;

db$.$insert$($TABLE$\_$LOCATIONS, null, values$)$;

db$.$close$()$;

$\}$

public Cursor getAllLocations$()\{$

SQLiteDatabase db $=$ this.getReadableDatabase$()$;

return db$.$query$($TABLE$\_$LOCATIONS, null, null, null, null, null, null$)$;

$\}$

$\}$