Final answer:
When defining a constant for a broadcast action, ensure that it is descriptive, declared as public static final, and has a unique string value that includes the package name for uniqueness.
Step-by-step explanation:
The best practice for defining a constant for an action that can be broadcast in application development is to ensure that the name of the constant is descriptive and reflects the action that triggers the broadcast.
Moreover, it is critical to ensure that the constant is declared as public static final if you are using a language like Java.
This makes it clear that the value is a constant and should not be changed. The constant's value should typically be a unique string, which often includes the package name to ensure its uniqueness across different applications.
When defining a constant for a broadcast action, ensure that it is descriptive, declared as public static final, and has a unique string value that includes the package name for uniqueness.