I need full codes, java code and activity xml code, no structure

Create an Android app that lets the user choose a city from a drop-down list using a spinner, and when the user selects a city, it starts a new activity that displays information about the selected city, such as an image, its weather and population, using explicit intent?

Here are the steps to create the app:

Create a new Android project in Android Studio.

1. Design the main layout of the app to include a spinner widget

a. (Create a gradient with colors of your own choice and set that as a background for your app layout)

b. Set the size of the spinner that looks pretty on the screen

2. Create an array of 10 popular cities of Canada to be used to populate the spinner.

3. Create a new activity that will display information about the selected city (atleast 3 cities)

4. Add an OnItemSelectedListener to the spinner to listen for item selection events.

a. In the onItemSelected method of the listener, create an explicit intent to start the new activity and pass the selected city as an extra and display the name of the city selected at the top of the second activity

5. Start the new activity using the startActivity method.