¿Qué es un diseño relativo?

What is a relative layout?

RelativeLayout is a view group that displays child views in relative positions. The position of each view can be specified as relative to sibling elements (such as to the left-of or below another view) or in positions relative to the parent RelativeLayout area (such as aligned to the bottom, left or center).

In android, TextView is a user interface control that is used to set and display the text to the user based on our requirements. In android, we can create a TextView control in two ways either in XML layout file or create it in Activity file programmatically.

To center align LinearLayout, assign android:gravity attribute of this LinearLayout with the value “center”. Let us create an Android application with LinearLayout containing two Button widgets as children. We shall center align these children using gravity attribute.

The Relative Layout is very flexible layout used in android for custom layout designing. It gives us the flexibility to position our component/view based on the relative or sibling component’s position. Just because it allows us to position the component anywhere we want so it is considered as most flexible layout.

Common Attributes of RelativeLayout

• android:layout_centerHorizontal=”true” This places the view horizontally in the center of the parent.
• android:layout_centerVertical=”true” This places the view vertically in the center of the parent.
• android:layout_centerInParent=”true”

A TextView displays text to the user and optionally allows them to edit it. A TextView is a complete text editor, however the basic class is configured to not allow editing.

ConstraintLayout has dual power of both Relative Layout as well as Linear layout: Set relative positions of views ( like Relative layout ) and also set weights for dynamic UI (which was only possible in Linear Layout).

In the popped out Tabs dialog box, do the below operations: (1.) Enter a tab number into the Tab stop position text box that means the position where you would like the right hand text to end; (2.) Check Right option in the Alignment section; (3.) Then, click Set button; (4.) At last, click OK button to close this dialog box. 4.

Notice that the views in the center are only centered vertically, and that the 2 textViews are to the right of the ImageView, which is also centered vertically. This all works well with RelativeLayout, which has the LinearLayout of the 2 TextViews, but I wish to know how to convert them into a single ConstraintLayout.

The 2 buttons are placed below the TextView having id textView. This is done by using the android:layout_below=”@+id/textView” attribute in both the Button tags. We have aligned both the buttons from the top margin (of each other), using android:layout_alignTop=”@id/button” attribute.

Chains provide group-like behavior in a single axis (horizontally or vertically). Set app:layout_constraintVertical_bias=”0.5″ to the views that need to be centered vertically, bias attribute only works if you specify the constraints for the boundaries (e.g. top and bottom for vertical bias, left and right for horizontal bias)