How Do You Use Relative Layout?

What is constraint layout in Android example?

Android ConstraintLayout is used to define a layout by assigning constraints for every child view/widget relative to other views present.

A ConstraintLayout is similar to a RelativeLayout, but with more power..

What is fillViewport?

The android:fillViewport property defines whether the ScrollView should stretch its content to fill the viewport. You can set the same property by calling setFillViewport(boolean) method.

What is a ScrollView?

In Android, a ScrollView is a view group that is used to make vertically scrollable views. A scroll view contains a single direct child only. … A ScrollView supports Vertical scrolling only, so in order to create a horizontally scrollable view, HorizontalScrollView is used.

Which layout is best in Android?

TakeawaysLinearLayout is perfect for displaying views in a single row or column. … Use a RelativeLayout, or even better a ConstraintLayout, if you need to position views in relation to siblings views or parent views.CoordinatorLayout allows you to specify the behavior and interactions with its child views.More items…•

What is the advantage of constraint layout?

The main advantage of ConstraintLayout is allows you to make large and complex layouts with a flat view hierarchy. No nested view groups like inside RelativeLayout or LinearLayout etc. You can make Responsive UI for android using ConstraintLayout and its more flexible compare to RelativeLayout.

Can we use linear layout in ConstraintLayout?

LinearLayout is a view group that aligns all children in a single direction, vertically or horizontally. You can specify the layout direction with the android:orientation attribute. Note: For better performance and tooling support, you should instead build your layout with ConstraintLayout.

Why do we use constraint layout in Android?

It allows us to lay out child views using ‘constraints’ to define position based relationships between different views found in our layout. The aim of the ConstraintLayout is to help reduce the number of nested views, which will improve the performance of our layout files.

What is difference between relative layout and constraint layout?

Rules remind you of RelativeLayout , for example setting the left to the left of some other view. Unlike RelativeLayout , ConstraintLayout offers bias value that is used to position a view in terms of 0% and 100% horizontal and vertical offset relative to the handles (marked with circle).

What is the difference between relative layout and linear layout in Android?

LinearLayout arranges elements side by side either horizontally or vertically. RelativeLayout helps you arrange your UI elements based on specific rules. AbsoluteLayout is for absolute positioning i.e. you can specify exact co-ordinates where the view should go. FrameLayout allows placements of views along Z-axis.

What is constraint layout?

A ConstraintLayout is a android. view. ViewGroup which allows you to position and size widgets in a flexible way. Note: ConstraintLayout is available as a support library that you can use on Android systems starting with API level 9 (Gingerbread).

What is layout and explain linear layout and relative layout with the help of example?

Android provides the following ViewGroups or layouts: LinearLayout : is a ViewGroup that aligns all children in a single direction, vertically or horizontally. RelativeLayout : is a ViewGroup that displays child views in relative positions. … TableLayout : is a view that groups its child views into rows and columns.

Should I use constraint layout?

We recommend that you use ConstraintLayout when designing your app’s layouts. In almost all cases when you would have previously need a deeply-nested layout, ConstraintLayout should be your go-to layout for optimal performance and ease of use.

Which is better linear layout or relative layout?

Relativelayout is more effective than Linearlayout. From here: It is a common misconception that using the basic layout structures leads to the most efficient layouts. However, each widget and layout you add to your application requires initialization, layout, and drawing.

How do I add an image to relative layout?

Important Note: We can set color or image in the background of RelativeLayout in XML using background attribute or programmatically means in java class using setBackgroundColor() for color and setBackground() method for setting image. Step 1: Create a new project and name it RelativeLayout’sBackgroundColorAndImage.

Is Relative layout deprecated?

Yes, insofar as it will be deprecated when the v26 edition of the support libraries are released in production form, later in 2017. That doesn’t stop you from using it with the v25 edition of the libraries. However, typically you need to keep moving to newer versions of those libraries, so you will need v26 eventually.

How many children can a ScrollView have?

one childA ScrollView can hold only one child View or ViewGroup . Use a ViewGroup such as LinearLayout as a child View within a ScrollView to scroll more than one View element. Enclose the elements within the LinearLayout .

Why ScrollView is not scrolling in Android?

Answer: the ScrollView is not working when used as the root element of an XML layout. It has to be wrapped inside a LinearLayout. Scroll View as Parent has no issues. I faced such issue when we add padding/margin to the direct child of scrollview.

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).