What is the purpose of the composition principle in object-oriented programming?

The principle of composition in object-oriented programming involves building complex objects from simpler ones by including objects of certain classes into others as fields or properties. This allows for creating flexible and reusable structures, avoiding rigid inheritance hierarchies.

For example, instead of inheriting functionality, a class can contain an object of another class and use its methods. This facilitates changing behavior at runtime and promotes loose coupling of components.

In Android development, composition is often used to combine various UI components or logic, for instance, a View can contain several child Views, and an Activity class can include different services and managers through composition.