Explanation:
In Android Gradle Plugin version 8.0, resource ids will be non-final by default. This means that the generated `R` class and its fields are no longer final. Previously, resource ids were final, allowing them to be used in switch case statements.
However, with non-final resource ids, using them in switch case statements can lead to compilation errors. This is because switch case statements require constant expressions, and non-final fields may not be considered constant expressions by the compiler.
Example:
Suppose we have the following resource ids in our `R` class:
public static int BUTTON_OK = 1;
public static int BUTTON_CANCEL = 2;
public static int BUTTON_HELP = 3;
Previously, we could use these resource ids in a switch case statement like this:
int buttonId = ...; // Get the button id from somewhere
switch (buttonId) {
case R.id.BUTTON_OK:
// Handle OK button click
break;
case R.id.BUTTON_CANCEL:
// Handle Cancel button click
break;
case R.id.BUTTON_HELP:
// Handle Help button click
break;
}
However, with non-final resource ids in Android Gradle Plugin version 8.0, the above code will result in a compilation error.
To avoid using resource ids in switch case statements, you can use if-else statements instead:
int buttonId = ...; // Get the button id from somewhere
if (buttonId == R.id.BUTTON_OK) {
// Handle OK button click
} else if (buttonId == R.id.BUTTON_CANCEL) {
// Handle Cancel button click
} else if (buttonId == R.id.BUTTON_HELP) {
// Handle Help button click
}
By using if-else statements, you can still handle different cases based on the resource id without relying on switch case statements.