Question: What Does Android Gravity Do?

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)..

What is layout weight and weight sum in Android?

Answer: Per documentation, android:weightSum defines the maximum weight sum, and is calculated as the sum of the layout_weight of all the children if not specified explicitly. Let’s consider an example with a LinearLayout with horizontal orientation and 3 ImageViews inside it.

What is the use of Layout_weight in Android?

LinearLayout also supports assigning a weight to individual children with the android:layout_weight attribute. This attribute assigns an “importance” value to a view in terms of how much space it should occupy on the screen. A larger weight value allows it to expand to fill any remaining space in the parent view.

Which attribute sets the gravity of the view or layout in its parents?

android:layout_gravity sets the gravity of the View or Layout relative to its parent.

What is the application class in Android?

Overview. The Application class in Android is the base class within an Android app that contains all other components such as activities and services. The Application class, or any subclass of the Application class, is instantiated before any other class when the process for your application/package is created.

What is the use of findViewById in Android?

Every Activity object has a method named findViewById, which finds a View object given its ID number. The code sample passes the variable R. id. today to this method to find the TextView.

What is view attribute?

View attributes. Enable view attribute inspection: Saves view attribute information in the mAttributes member variable of a View instance so it can be used for debugging.

What is Android padding?

The padding is expressed in pixels for the left, top, right and bottom parts of the view. Padding can be used to offset the content of the view by a specific number of pixels. For instance, a left padding of 2 will push the view’s content by 2 pixels to the right of the left edge.

What is the correct use of Android gravity attribute?

android:gravity is used to specify how to place the content of the object within the object itself. In another word, android:gravity is used to specify the gravity of the content of the view. android:layout_gravity is an attribution the child can supply to its parent, to specify the gravity the view within its parents.

Where are layouts placed in Android?

In Android, an XML-based layout is a file that defines the different widgets to be used in the UI and the relations between those widgets and their containers. Android treats the layout files as resources. Hence the layouts are kept in the folder reslayout.

What is absolute layout in Android?

A layout that lets you specify exact locations (x/y coordinates) of its children. Absolute layouts are less flexible and harder to maintain than other types of layouts without absolute positioning.

What is the difference between gravity and Layout_gravity in Android?

So in general android:layout_gravity attribute is used by child views to tell their parent how they want to be placed inside it, while android:gravity is used by the parent layout to tell the child views how they should be placed inside it.

What are views in Android?

View is the basic building block of UI(User Interface) in android. View refers to the android. It can be an image, a piece of text, a button or anything that an android application can display. … The rectangle here is actually invisible, but every view occupies a rectangle shape.

What is foreground gravity?

android:foregroundGravity. Defines the gravity to apply to the foreground drawable. android:measureAllChildren. Determines whether to measure all children or just those in the VISIBLE or INVISIBLE state when measuring.

How do you kill an activity?

You can also add android:noHistory=”true” to your Activity tag in AndroidManifest. xml . Yes, all you need to do is call finish() in any Activity you would like to close.

What are the 4 types of app components?

There are four different types of app components:Activities.Services.Broadcast receivers.Content providers.

What is difference between Wrap_content and Match_Parent?

Define Major differences between match_parent, fill_parent, wrap_content attributes with examples. Match_Parent : Definition of match parent is to match width and height same as its parent attribute tag. … Wrap_Content : Definition of wrap content is to cover the only its included content + declared padding size.

The orientation attribute is used to arrange its children either in horizontal or vertical order. The valid values for this attribute are horizontal and vertical. If the value of the android:orientation attribute is set to vertical, the children in the linear layout are arranged in a column layout, one below the other.