How to use MainActivity class of com.example.fuel package

...60    }61    fun getApiQuestions(): ArrayList<Question> {62        //Bruk volley: https://developer.android.com/training/volley/request63        //Bruk metoden her: https://www.thecrazyprogrammer.com/2017/01/android-json-parsing-from-url-example.html64        val tag= "MainActivity" // for logging purposes65        val gson = Gson()66        val questionslist = ArrayList<Question>()67        runBlocking {68            try {69                val response = Fuel.get("https://opentdb.com/api.php?amount=2&category=17&type=multiple").awaitString()70                Log.d(tag, response)71                val questions = gson.fromJson(response, Questions::class.java)72                val questionslist = ArrayList<Question>()73                val q1 = Question(74                    1,75                    questions.results[0].question,76                    R.drawable.sirius,77                    "bleek",78                    "Moralis",79                    "Black",80                    "White",81                    382                )83                questionslist.add(q1)84                val q2 = Question(85                    2,86                    questions.results[1].question,87                    R.drawable.sirius,88                    "Noldus",89                    "Gulla",90                    "Voldemort",91                    "Albus Dumbledore",92                    293                )94                questionslist.add(q2)95                Log.d(tag, questions.results[0].question)96            }97            catch (e  : Exception) {98                Log.e(tag, e.message)99                //Toast.makeText(this@MainActivity, "could not find course", Toast.LENGTH_SHORT).show()100            }101        }102        return questionslist103    }104}...

...9import android.widget.EditText10import android.widget.Toast11import androidx.fragment.app.Fragment12import androidx.navigation.fragment.findNavController13import com.example.android.BOJA.MainActivity14import com.example.android.BOJA.R15import com.github.kittinunf.fuel.core.extensions.authentication16import com.github.kittinunf.fuel.core.extensions.cUrlString17import com.github.kittinunf.fuel.httpPost18import com.github.kittinunf.result.Result19import org.json.JSONObject20class SignIn : Fragment() {21    private val TAG = MainActivity::class.java.simpleName22    override fun onCreateView(23            inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?24    ): View? {25        val view = inflater.inflate(R.layout.fragment_sign_in, container, false);26        view.findViewById<Button>(R.id.signin_btn).setOnClickListener {27//            findNavController().navigate(R.id.action_signIn_to_registered)28            (activity as MainActivity).setProgressIndicator(view, true)29            val textUsername = view.findViewById<EditText>(R.id.user_name_text).text;30            val textPassword = view.findViewById<EditText>(R.id.password_text).text;31            (getString(R.string.url_main) + "signin?username=").plus(textUsername.toString()).plus("&passcode=").plus(textPassword.toString())32                    .httpPost()33                    .authentication()34                    .also { Log.d(TAG, it.cUrlString()) }35                    .responseString { _, _, result ->36                        when (result) {37                            is Result.Failure -> {38                                val data = result.error.errorData.toString(Charsets.UTF_8)39                                Log.v(TAG, "Failure, ErrorData: $data")40                                (activity as MainActivity).setProgressIndicator(view, false)41                                val message = if (data.isEmpty()) "Error" else JSONObject(data).getString("message")42                                Toast.makeText(view.context, message, Toast.LENGTH_LONG).show()43                            }44                            is Result.Success -> {45                                val data = result.get()46                                println(data)47                                Log.v(TAG, "Success: $data")48                                (activity as MainActivity).setProgressIndicator(view, false)49                                val userID = JSONObject(data).getInt("user_id");50                                val sharedPref = activity?.getSharedPreferences("LoginStatus", Context.MODE_PRIVATE)51                                sharedPref?.edit()?.putInt("user_id", userID)?.apply()52                                sharedPref?.edit()?.putBoolean("DidLogIn", true)?.apply()53                                sharedPref?.edit()?.putString("user_name", textUsername.toString())?.apply()54                                findNavController().navigate(R.id.action_signIn_to_registered)55                            }56                        }57                    }58        }59        return view60    }61}...

...51        }52        if (file.exists()) {53            file.delete()54        }55        file.appendText("${(activity as MainActivity).startingLocation}\n")56        file.appendText("${(activity as MainActivity).destination}\n")57        file.appendText("${(activity as MainActivity).averageFuelUsage}\n")58        file.appendText("${(activity as MainActivity).fuelInTank}\n")59        file.appendText("${(activity as MainActivity).typeOfFuel}\n")60    }61}...

...6import android.view.LayoutInflater7import android.view.View8import android.view.ViewGroup9import android.widget.TextView10import com.example.polestarinfo.activities.MainActivity11import com.example.polestarinfo.R12import com.example.polestarinfo.constants.Constant.fuelDoorLocations13import com.example.polestarinfo.constants.Constant.seatLocations14class CarInfoTabFragment : Fragment() {15    private lateinit var mCarPropertyManager: CarPropertyManager16    private lateinit var makeText: TextView17    private lateinit var modelText: TextView18    private lateinit var modelYearText: TextView19    private lateinit var driverSeatLocationText: TextView20    private lateinit var fuelDoorLocationText: TextView21    override fun onCreateView(22        inflater: LayoutInflater, container: ViewGroup?,23        savedInstanceState: Bundle?24    ): View? {25        val view = inflater.inflate(R.layout.fragment_car_info_tab, container, false)26        makeText = view.findViewById(R.id.make)27        modelText = view.findViewById(R.id.model)28        modelYearText = view.findViewById(R.id.model_year)29        driverSeatLocationText = view.findViewById(R.id.driver_seat_location)30        fuelDoorLocationText = view.findViewById(R.id.fuel_door_location)31        mCarPropertyManager = (activity as MainActivity).getCarPropertyManager()32        val make = "Make: " + mCarPropertyManager.getProperty<String>(VehiclePropertyIds.INFO_MAKE, 0).value33        val model = "Model: " + mCarPropertyManager.getProperty<String>(VehiclePropertyIds.INFO_MODEL, 0).value34        val modelYear = "Model year: " + mCarPropertyManager.getIntProperty(VehiclePropertyIds.INFO_MODEL_YEAR, 0).toString()35        val driverSeatLocation = "Driver seat location: " + seatLocations[mCarPropertyManager.getIntProperty(VehiclePropertyIds.INFO_DRIVER_SEAT, 0)]36        val fuelDoorLocation = "Fuel door location: " + fuelDoorLocations[mCarPropertyManager.getIntProperty(VehiclePropertyIds.INFO_EV_PORT_LOCATION, 0)]37        makeText.text = make38        modelText.text = model39        modelYearText.text = modelYear40        driverSeatLocationText.text = driverSeatLocation41        fuelDoorLocationText.text = fuelDoorLocation42        return view43    }44}...

...23    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {24        super.onViewCreated(view, savedInstanceState)25        val calculateButton = binding.calculateButton26        calculateButton.setOnClickListener{27            (activity as MainActivity).startingLocation = binding.startingLocation.text.toString()28            (activity as MainActivity).destination = binding.destination.text.toString()29            (activity as MainActivity).averageFuelUsage = binding.avgFuelUsage.text.toString().toDouble()30            (activity as MainActivity).fuelInTank = binding.fuelInTank.text.toString().toInt()31            //Navigation.findNavController(binding.root).navigate(R.id.action_startScreen_to_resultScreen)32            Navigation.findNavController(binding.root).navigate(R.id.action_startScreen_to_resultScreen)33            }34        binding.fuelButtons.setOnCheckedChangeListener { group, checkedId ->35            (activity as MainActivity).typeOfFuel = when (checkedId) {36                R.id.dieselButton -> 137                R.id.gasolineButton -> 238                R.id.lpgButton -> 339                else -> 040            }41        }42    }43    private fun calculate() {44        //algorytm obliczania kosztow paliwa45    }46}...

...19    private var fuelTypeList: ArrayList<String> = ArrayList()20    lateinit var viewModel: VehicleViewModel21    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {22        super.onViewCreated(view, savedInstanceState)23        (activity as MainActivity).toolbar.title = "Select Fuel Type"24        viewModel = (activity as MainActivity).viewModel25        setUpRecyclerView()26        fuelTypeList.add("Petrol")27        fuelTypeList.add("Diesel")28        fuelTypeList.add("CNG")29        fuelTypeList.add("Petrol + CNG")30        fuelTypeList.add("Electric")31        fuelTypeList.add("Hybrid")32    }33    private fun setUpRecyclerView() {34        fuelAdapter = ItemAdapter(this)35        fuelTypeRecyclerView.apply {36            this.setHasFixedSize(true)37            layoutManager = LinearLayoutManager((activity as MainActivity).applicationContext)38            fuelAdapter.updateItemList(fuelTypeList)39            adapter = fuelAdapter40        }41    }42    override fun onItemClicked(position: Int) {43        viewModel.vehicleFuel = fuelTypeList[position]44        findNavController().navigate(R.id.action_vehicleFuelType_to_vehicleTransmission)45    }46}...

...9        super.onCreate(savedInstanceState)10        binding = ActivityFuelDownloadBinding.inflate(layoutInflater)11        setContentView(binding.root)12        binding.back.setOnClickListener {13            // Transition to MainActivity14            val intent = Intent(application, MainActivity::class.java)15            startActivity(intent)16            // Finish FuelDownloadActivity17            finish()18        }19        binding.fuelDownloadGetString.text = FuelDownloader().download()20    }21}...

2import android.content.Intent3import android.os.Bundle4import androidx.appcompat.app.AppCompatActivity5import com.example.demo.databinding.ActivityMainBinding6class MainActivity : AppCompatActivity() {7    private lateinit var binding: ActivityMainBinding8    override fun onCreate(savedInstanceState: Bundle?) {9        super.onCreate(savedInstanceState)10        binding = ActivityMainBinding.inflate(layoutInflater)11        setContentView(binding.root)12        binding.fuelDownloadActivity.setOnClickListener {13            // Transition to FuelDownloadActivity14            val intent = Intent(application, FuelDownloadActivity::class.java)15            startActivity(intent)16            // Finish MainActivity17            finish()18        }19    }20}...

1package com.example.fuel;2import android.app.Activity;3import android.os.Bundle;4import android.view.Menu;5import android.view.MenuItem;6import android.widget.TextView;7public class MainActivity extends Activity {8	protected void onCreate(Bundle savedInstanceState) {9		super.onCreate(savedInstanceState);10		setContentView(R.layout.activity_main);11		TextView tv = (TextView) findViewById(R.id.textView1);12		tv.setText("Hello World");13	}14	public boolean onCreateOptionsMenu(Menu menu) {15		getMenuInflater().inflate(R.menu.main, menu);16		return true;17	}18	public boolean onOptionsItemSelected(MenuItem item) {19		int id = item.getItemId();20		if (id == R.id.action_settings) {21			return true;22		}23		return super.onOptionsItemSelected(item);24	}25}

1        Class<?> cls = Class.forName("com.example.fuel.MainActivity");2        Object obj = cls.newInstance();3        Method method = cls.getMethod("getFuelPrice", String.class);4        String result = (String) method.invoke(obj, "1");5        System.out.println(result);6        Class<?> cls2 = Class.forName("com.example.fuel.Fuel");7        Object obj2 = cls2.newInstance();8        Method method2 = cls2.getMethod("getFuelPrice", String.class);9        String result2 = (String) method2.invoke(obj2, "1");10        System.out.println(result2);11    }12}