Menu resource is one of the android resources that help in creating an interactive user interface. T he menu resource inflates particular menu choices. A functionality like ifRoom is used to show an option if there is a space and force the menu to show up even if there is an overlap with different options. onClick, Ids, and titles attributes are used together with the menu resource to perform a particular task.
Layouts resource defines the user interface structure in the android application. The layout elements are built using the View and ViewGroup objects hierarchy. The View object creates something that the user can view and interact with. The ViewGroup is invisible and in the form of a container, which defines the structure for the view layout and other ViewGroup objects ( Micinski, Votipka, Stevens, Kofinas, Mazurek, & Foster, 2017, May). View objects are also called widgets, and examples include TextView and button. ViewGroup objects are also referred to as layouts, and examples include ConstraintLayout or LinearLayout. The layouts can be declared in two different ways. One is declaring the user interface elements in XML as Android provides a direct vocabulary corresponding to the widgets and layouts. The second way is to instantiate the layout elements during runtime.
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Style resource helps one format the screen for aesthetic purposes, such as the text colour and size, the space between views and the background area. Different styles can be used in views to create main themes that other elements can use. Different style options can be defined to be a backup in case one is not available. For example, a custom font can be defined if the user lacks a default font. The user can pick different styles from the menu if the options are coded. The colour or dimension resource use the sp or dp option for different screen sizes and user preferences. Absolute units like in or mm can also be used to cater to user preferences.
References
Micinski, K., Votipka, D., Stevens, R., Kofinas, N., Mazurek, M. L., & Foster, J. S. (2017, May). User interactions and permission use on android. In Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems (pp. 362-373).
