According to the Android documentation, a fragment is a part of applications user interface that is bound to an activity. Fragments have their lifecycle and layouts or UI components. Fragments help enrich your UI design, pass data between different screens, and adapt to different device configurations.

What is the purpose of a fragment?

A Fragment represents a reusable portion of your app’s UI. A fragment defines and manages its own layout, has its own lifecycle, and can handle its own input events. Fragments cannot live on their own–they must be hosted by an activity or another fragment.

Why we use fragments instead of activities?

We can’t create multi-screen UI without using fragment in an activity, After using multiple fragments in a single activity, we can create a multi-screen UI. Fragment cannot be used without an Activity. While Using fragments in the project, the project structure will be good and we can handle it easily.

Are fragments still used in Android?

Using the support library, fragments are supported back to all relevant Android versions. Fragments encapsulate views and logic so that it is easier to reuse within activities. Fragments are standalone components that can contain views, events and logic.

How does fragment work in Android?

Android – Fragments

  1. A fragment has its own layout and its own behaviour with its own life cycle callbacks.
  2. You can add or remove fragments in an activity while the activity is running.
  3. You can combine multiple fragments in a single activity to build a multi-pane UI.
  4. A fragment can be used in multiple activities.

What types of fragments are in Android?

Types of Android Fragments

  • Single Fragments. Single fragments show only a single view for the user on the screen. …
  • List Fragments. List fragments are those that have a special list view feature. …
  • Fragment Transactions. Fragment transactions are for the transition from one fragment to another.


What is activity and fragment in Android?

An Activity is an application component that provides a screen, with which users can interact in order to do something. More details: https://developer.android.com/guide/components/activities/intro-activities. Whereas a Fragment represents a behavior or a portion of user interface in an Activity.

How do you use fragments?

Quote from video: So we come back into our java app folder right click here new and you go inside the fragment so fragments already there all you need to do is you just need to click on fragment.

Is it possible activity without UI in Android?

Explanation. Generally, every activity is having its UI(Layout). But if a developer wants to create an activity without UI, he can do it.

What are fragments?

Fragments are incomplete sentences. Usually, fragments are pieces of sentences that have become disconnected from the main clause. One of the easiest ways to correct them is to remove the period between the fragment and the main clause.

What is fragment and its lifecycle?

Android Fragment is the part of activity, it is also known as sub-activity. There can be more than one fragment in an activity. Fragments represent multiple screen inside one activity. Android fragment lifecycle is affected by activity lifecycle because fragments are included in activity.

What is fragment and how we can create it in Android application?

A fragment represents a modular portion of the user interface within an activity. A fragment has its own lifecycle, receives its own input events, and you can add or remove fragments while the containing activity is running. This document describes how to create a fragment and include it in an activity.

What is toast in Android?

A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. Toasts automatically disappear after a timeout.

What is the use of spinner in Android?

Spinners provide a quick way to select one value from a set. In the default state, a spinner shows its currently selected value. Touching the spinner displays a dropdown menu with all other available values, from which the user can select a new one.

What is manifest XML in Android?

Every project in Android includes a manifest file, which is AndroidManifest. xml, stored in the root directory of its project hierarchy. The manifest file is an important part of our app because it defines the structure and metadata of our application, its components, and its requirements.

Why is TextView used in Android?

TextView is the user interface which displays the text message on the screen to the user. It is based on the layout size, style, and color, etc. TextView is used to set and display the text according to our specifications.

What is EMS in Android?

ems is a unit of measurement. The name em was originally a reference to the width of the capital M. It sets the width of a TextView/EditText to fit a text of n ‘M’ letters regardless of the actual text extension and text size. Eg : android:ems Makes the EditText be exactly this many ems wide.

What is the difference between TextView and EditText in Android?

EditText is used for user input. TextView is used to display text and is not editable by the user. TextView can be updated programatically at any time.

What does Wrap_content mean in Android?

WRAP_CONTENT means that the view wants to be just large enough to fit its own internal content, taking its own padding into account.

What is padding in android?

Padding in Android is used to add a blank space between a view and its contents. Margins, on the other hand, are used to add a space between two different views.

What is difference between match parent and wrap content?

FillParent/Match parent: Fill parent is the older version, the updated one is the match parent which takes the entire screen. Wrap Content: Wrap content takes the length of the text and wraps its content. Example: “This is a Wrap Text”. The wrap content starts wrapping from “This” and ends at “text”.

What is difference between Fill parent and match parent?

match_parent and fill_parent are same property, used to define width or height of a view in full screen horizontally or vertically. These properties are used in android xml files like this. fill_parent was used in previous versions, but now it has been deprecated and replaced by match_parent . I hope it’ll help you.

What is wrap content in XML?

The Android wrap_content, as the name suggests, sets a view’s size to wrap_content which will only expand enough to contain the values. In simple words, the view wrapped with wrap_content will just be big enough to enclose its contents.

What is gravity in android XML?

android:gravity is an attribute that sets the gravity of the content of the view its used on. The android:gravity specifies how an object should position its content on both X and Y axis. The possible values of android:gravity are top, bottom, left, right, center, center_vertical, center_horizontal etc.

What is fill parent and Wrap_content in android?

wrap_content – The component just want to display big enough to enclose its content only. fill_parent – The component want to display as big as its parent, and fill in the remaining spaces.

What is LayoutParams in android?

This set of layout parameters defaults the width and the height of the children to ViewGroup. LayoutParams. WRAP_CONTENT when they are not specified in the XML file. TableLayout.LayoutParams. This set of layout parameters enforces the width of each child to be ViewGroup.

What is linear layout in android?

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.