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Activity Lifecycle and Tech Guide for Android App Developer

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An activity is a single, focused thing that the user can do. Almost all activities interact with the user, So that when we see something in device’s screen that is showing by activity. We can develop a single application with multiple activities like home, signup, signin etc.
 
Activities in the system are managed as an activity stack. When a new activity is started, it is placed on the top of the stack and becomes the running activity and the previous activity always remains below it in the stack, and will not come to the foreground again until the new activity closed. Continue reading