Counter App

 Output:

Recourses Link: https://drive.google.com/drive/folders/1vp4TVMTACXblVQM-HGPc1UrqWZoAoRV6?usp=drive_link

XML Code:

<TextView
        android:id="@+id/welcome_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="74dp"
        android:text="The Counter App"
        android:textSize="32dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
 <TextView
        android:id="@+id/counter_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="56dp"
        android:text="0"
        android:textSize="72sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/welcome_text" />
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="84dp"
        android:text="Click Me"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/counter_text" />

Java Code:

TextView welcome_text, counter_text;

    Button btn;

    int counter = 0;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        btn = findViewById(R.id.btn);

        counter_text = findViewById(R.id.counter_text);

        welcome_text = findViewById(R.id.welcome_text);

        // Adding the Functionalities

        btn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                counter_text.setText(""+increaseCounter());

            }

        });

    }

    public int increaseCounter(){

        return ++counter;

    }