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In Android, the class sends log messages to a shared system-level log. Each implementation will simply log a message informing you that the method has been called. In this section, you are going to override lifecycle methods to eavesdrop on QuizActivity’s lifecycle. You override them in your activity subclasses, and Android calls them at the appropriate time. It is important to understand that you never call onCreate(.) or any of the other Activity lifecycle methods yourself. Setting listeners on widgets to handle user interaction Inflating widgets and putting them on screen (in the call to ( setContentView(int))

Typically, an activity overrides onCreate(.) to prepare the specifics of its user interface: The OS calls this method after the activity instance is created but before it is put on screen. You are already acquainted with one of these methods – onCreate(Bundle). Subclasses of Activity can take advantage of the methods named in Figure 3.1 to get work done at critical transitions in the activity’s lifecycle.

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