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The object hierarchy is a way to organize the objects in an Android project. It helps developers to keep track of all the objects and their relationships with each other. The hierarchy can be used for designing the UI, managing the data, and creating new objects.
The advantages of using an object hierarchy in Android development are:
A callback interface is a type of programming interface that allows for the passing of a function as an argument to another function. The callback function is invoked by the called function when it has completed its task. The callback interface can be used in Android development to create applications that are more responsive and interactive. Android provides developers with various types of callback interfaces, such as onClick(), onKey(), and onTouch().
Intents are a mechanism that Android uses to allow applications to share data. There are four types of intents:
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