Custom ListView Not Displaying in Emulator - Black Activity

FI am trying to display a custom ListView using a custom adapter for a Car class. However, when I run the app in the emulator, the activity screen is black. I added some static text to the XML layout to debug, and the text appeared, so the issue seems to be with the ListView or setAdapter().

Here’s my setup:

XML Layout (activity_main.xml):

`

<?xml version="1.0" encoding="utf-8"?><LinearLayout    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    xmlns:android="http://schemas.android.com/apk/res/android"><ListView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/cars_list"/></LinearLayout>

`

This is my main activity:

package com.example.carscustomadapter;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;import android.widget.ListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ListView carsList = findViewById(R.id.cars_list);        List<Car> cars = new ArrayList<>();        cars.add(new Car(1000,20,2));        cars.add(new Car(1000,40,2));        cars.add(new Car(1000,60,8));        cars.add(new Car(1000,100,5));        cars.add(new Car(1000,20,2));        cars.add(new Car(1000,40,2));        cars.add(new Car(1000,60,8));        cars.add(new Car(1000,100,5));        cars.add(new Car(1000,20,2));        cars.add(new Car(1000,40,2));        cars.add(new Car(1000,60,8));        cars.add(new Car(1000,100,5));        cars.add(new Car(1000,20,2));        cars.add(new Car(1000,40,2));        cars.add(new Car(1000,60,8));        cars.add(new Car(1000,100,5));        CarsAdapter carsAdapter = new CarsAdapter(cars);        carsList.setAdapter(carsAdapter);    }}

Custom Adapter (CarsAdapter)

 public class CarsAdapter extends BaseAdapter implements View.OnClickListener {    private List<Car> cars;    public CarsAdapter(List<Car> cars) {        this.cars = cars;    }    @Override    public int getCount() {        return 0;    }    @Override    public Object getItem(int position) {        return null;    }    @Override    public long getItemId(int position) {        return 0;    }    @Override    public View getView(int i, View view, ViewGroup viewGroup) {        if (view == null)            view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.car_layout, viewGroup, false);        TextView kmTv = view.findViewById(R.id.km_tv);        TextView fuelTv = view.findViewById(R.id.fuel_tv);        Button driveBtn = view.findViewById(R.id.drive_btn);        driveBtn.setTag(i);        Car car = cars.get(i);        kmTv.setText(car.getMileage() +"");        fuelTv.setText(car.getFuel() +"");        driveBtn.setOnClickListener(this);        return view;    }    @Override    public void onClick(View v) {        LinearLayout root = (LinearLayout) v.getParent();        EditText editText = root.findViewById(R.id.km_et);        Car car = cars.get((Integer) v.getTag());        car.drive(Integer.parseInt(editText.getText().toString()));        notifyDataSetChanged();    }}

The Issue::When running the app, the screen is black, and the ListView does not display anything. I suspect the issue might be with:

1.The adapter configuration or implementation.2.Incorrect data being provided to the ListView.3.Layout issues with the car_layout.xml (not provided here but could be relevant).

screen Image

What I Tried:1.Adding static text to the activity_main.xml to confirm the layout is 2.rendering properly.3.Verifying that setAdapter() is called.4.Debugging the app, but I’m not sure where the problem lies.

What I ExpectI expect to see a ListView populated with rows of Car objects. Each row should display the mileage and fuel, with a button for actions.