Preedits_monopneumonous_twice-challenged
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University of Illinois, Urbana Champaign *
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101
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Information Systems
Date
Feb 20, 2024
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docx
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2
Uploaded by PresidentTeamIbex33
Question: Enumerate the three key loops when monitoring an activity
Answer: Entire lifetime – activity happens between onCreate and onDestroy, Visible lifetime
– activity happens between onStart and onStop, Foreground lifetime – activity happens between onResume and onPause
Question: What is the Android Architecture?
Answer: Android Architecture is made up of 4 key components: Linux Kernel, Libraries, Android Framework, Android Applications
Question: What is Android?
Answer: It is an open-sourced operating system that is used primarily on mobile devices, such as cell phones and tablets. It is a Linux kernel-based system that’s been equipped with rich components that allows developers to create and run apps that can perform both basic and advanced functions.
Question: Describe Activities.
Answer: Activities are what you refer to as the window to a user interface. Just as you create
windows in order to display output or to ask for an input in the form of dialog boxes, activities play the same role, though it may not always be in the form of a user interface.
Question: Differentiate Activities from Services.
Answer: Activities can be closed, or terminated anytime the user wishes. On the other hand, services are designed to run behind the scenes, and can act independently. Most services run continuously, regardless of whether there are certain or no activities being executed.
Question: What is a visible activity?
Answer: A visible activity is one that sits behind a foreground dialog. It is actually visible to the user, but not necessarily being in the foreground itself.
Question: What is the importance of Android in the mobile market?
Answer: Developers can write and register apps that will specifically run under the Android environment. This means that every mobile device that is Android enabled will be able to support and run these apps. With the growing popularity of Android mobile devices, developers can take advantage of this trend by creating and uploading their apps on the Android Market for distribution to anyone who wants to download it.
Question: What data types are supported by AIDL?
Answer: AIDL has support for the following data types: -string, -charSequence, -List, -Map, -
all native Java data types like int, long, char and Boolean
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