Android 9 Development Cookbook - Third Edition

How to do it...

Normally, we use the AppCompat option when creating a project but in the preceding Getting ready section, we deselected this option as we need to explicitly set our resources manually. We will verify we are extending from the generic Activity class, then we can add our new style resources to select the theme based on the API. Here are the steps:

1. We need to make sure MainActivity extends from Activity and not AppCompatActivity. Open ActivityMain.java and if necessary, change it to read as follows:

public class MainActivity extends Activity { 

2. Open activity_main.xml and drop in two views: Button and Checkbox.
3. Open styles.xml and remove AppTheme as it will not be used. Add our new theme so the file reads as follows:

<resources> ...