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Questions and Answers
Absolute positioning (C++, C#, others): – – Programmer specifies exact pixel coordinates of every component. 'Put this button at (x=15, y=75) and make it 70x31 px in size.'
programmer
Layout managers (Java, Android): – Objects that decide where to position each component based on some general rules or criteria. 'Put these four buttons into a 2x2 grid and put these text boxes in a horizontal flow in the south part of the app.' More flexible and general; works better with a variety of devices.
layout managers
ViewGroup as layout ViewGroup superclass represents containers of widgets/views – – – layouts are described in XML and mirrored in Java code Android provides several pre-existing layout managers; you can define your own custom layouts if needed layouts can be nested to achieve combinations of features in the Java code and XML: – – – an Activity is a ViewGroup various Layout classes are also ViewGr.
viewgroup
Sizing and ______ How does the programmer specify where each component appears, how big each component should be, etc.
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Layouts can be ______ to achieve combinations of features in the Java code and XML
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Which programming language uses absolute positioning to specify the exact pixel coordinates of every component?
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Which of the following is true about layout managers in Java and Android?
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What is the advantage of using layout managers over absolute positioning?
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What is a ViewGroup in Android?
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Can layouts be nested in both Java code and XML?
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