Posted On : 7th December, 2016 by ViitorCloud
The mobile app development is one of the most difficult and details-oriented development tasks as the developer has to ensure that the mobile app not only facilitates outstanding functionality, but also offers exceptional User Interface to the mobile app users irrespective of their device’s screen size. One of the ways to ensure that the mobile app would perform appropriately on each screen and adjust itself automatically as the screen size increases or decreases is by opting the responsive UI design for the mobile app development. Constraint layout is an amazing way to build a responsive UI for the mobile apps and deliver an excellent user experience over your app.
What is Constraint Layout?
Constraint Layout is one of the newest additions to the collection of layouts offered by Android. It is a layout which is quite similar to Relative Layout, but is far more versatile and powerful. It allows the creation of complex and colossal layouts with a flat view hierarchy.
Constraint Layout emphasizes on making the development of layouts much easier, intuitive and faster whilst improving the performance at the runtime. It significantly speeds up the development tasks and at the same time, it enables the development of responsive UI for the app.
Constraints are an integral part of the overall mobile app development. A constraint can be comprehended as the description of how the view in the app’s design must be positioned in relation to the other item’s placement, in the overall layout. A constraint is conventionally defined for one or more sides by connecting the overall view with:
• An edge of the layout
• Another view or an anchor point
• An invisible guideline
Principally, the Constraints Layout works in a similar manner as the Relative Layout does, but uses the different handles or anchors for the constraints.
Handles Used in Constraint Layout
There are different types of handles or constraints that are used in the constraint layout to enable diverse views in the app’s user interface. These include:
The side handle is used for specifying the location of a widget in the app’s design. For instance, the left side handle can be used to stay aligned to the right side of the other view, or to the left of the Constraint Layout.
The resize handles appear like small square box and it is used for resizing the view. It enables the app to adjust its view to the different screen sizes.
The baseline handle appears like a long elongated rectangular figure with curved lines on two sides. It is used for aligning the text of the view by the baseline of the text on another view.
For defining the position of a view in the Constraint Layout, are required to add two or more constraints for that view. Each constraint or handle represents an alignment or connection to the other view, an invisible guideline or the parent layout. Each constraint defines the position of the view along with either of the two axis, horizontal or vertical. His way, each view will have a minimum of one constraint for each of the axis, but often more than one are essential.
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