On each tab you can use different type of Layout.Ĭonsider that tabs design has changed between Android 2.X and 4.X: Tabs, source List View Then, a single Activity may contain several tabs and user can easily switch between them. Tabbed layouts allow to introduce tabs in our Android application. This type of Layout is often used on screens displaying photos or similar sets of “blocks” to click: GridView, source Tab Layout GridView displays items in two-dimensional grid. May be useful when displaying some statistics or reports. Table LayoutĪs its name suggests, TableLayout allows to group elements into rows and columns: TableLayout, source It’s quite specific and I personally found it difficult to understand and use initially, but it seems to be worth it.
RelativeLayout allows (if properly built, of course) to adjust your set of controls easily to almost every type of screen. Consider that for building mobile apps’ interfaces these can be run on multiple devices with different screens’ resolutions. aligned to the right): RelativeLayout, source Each UI element can also be positioned according to the layout’s borders (e.g. You can specify that, for instance, one UI element can be said to be placed on the left of another element, or on the bottom of another etc. RelativeLayout enforces to display elements in relations to each other. This type of Layout enforces you to put your controls in a linear direction, either horizontally or vertically: LinearLayout, source Relative Layout When Android app is created in Visual Studio 2017, its MainActivity has by default LinearLayout set: LinearLayout set on MoneyBack’s MainActivity LinearLayout is the most basic type of Layout.
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Below each screenshot used to present a particular Layout Type you can find its source, which leads to a tutorial or more detailed explanation on how to work with it. Let’s now see what are the most important Layout Types.
The following diagram presents this hierarchy based on RelativeLayout: RelativeLayout hierarchy, source: View is the base class for buttons, text fields etc., more precisely: for widgets (don’t confuse it with app widgets you place on your Android screen 🙂 ). Each Layout is a subclass of ViewGroup class, which derives from View class, which is the basic UI building block. Layouts structureīasically, user interface in Android apps is built using Layouts. It may be considered as a set of rules according to which controls (buttons, text fields, input fields etc.) are placed on the View. Layout defines a visual structure of an Activity (or app widget).
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