Unit Converter App

 Output:

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

XML Code:

<EditText
        android:textColor="@color/white"
        android:textColorHint="@color/white"
        android:id="@+id/editText"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="230dp"
        android:hint="Enter weight in Kilos"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
<Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="66dp"
        android:text="Convert kilos to pounds"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editText" />

<TextView
        android:id="@+id/textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="135dp"
        android:text="0"
        android:textColor="@color/white"
        android:textSize="70sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

JAVA Code:

EditText editText;
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = findViewById(R.id.editText);
        btn = findViewById(R.id.btn);
        textView = findViewById(R.id.textview);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Getting the user input (Kilos)
                String inputText = editText.getText().toString();

                // Converting a string into double
                double kilos = Double.parseDouble(inputText);
                // Converting kilos into pounds
                double pounds = makeConversion(kilos);
                // Displaying the conversion result
                textView.setText("" + pounds);
            }
        });
    }
    public double makeConversion(double kilos){
        // 1 kilo = 2.20462 pounds
        return kilos * 2.20462;
    }