how to use spinner

Question

I just started using Android. In my application, I want to use two spinners. One spinner should display a list of nations, while the other spinner should display a list of cities for each country that is selected. When a city is chosen, something happens. Please provide some sample code for me. Thank you in advance.

Answer 1

You can add a spinner to your layout with the Spinner object. You should usually do so in your XML layout with an <Spinner> element. For example:

<Spinner
    android:id="@+id/planets_spinner"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

To populate the spinner with a list of choices, you then need to specify a SpinnerAdapter in your Activity or Fragment source code.

Key classes are the following:

• Spinner
• SpinnerAdapter
• AdapterView.OnItemSelectedListener