What is difference between fragment and activity in Android?

Activity is an application component that gives a user interface where the user can interact. The fragment is only part of an activity, it basically contributes its UI to that activity. Fragment is dependent on activity. It can’t exist independently.

What is the difference between an android activity and service?

An Activity and Service are the basic building blocks for an Android app. Usually, the Activity handles the User Interface (UI) and interactions with the user, while the service handles the tasks based on the user input.

What is service differentiate between activity and service?

An activity represents a single screen with a user interface. For example, an email application might have one activity that shows a list of new emails . A service is a component that runs in the background to perform long-running operations or to perform work for remote processes.

What is the purpose of the activity in Android?

An activity provides the window in which the app draws its UI. This window typically fills the screen, but may be smaller than the screen and float on top of other windows. Generally, one activity implements one screen in an app.

What are the advantages of using fragment over activity in Android?

So in the spirit of just wanting to know what time it is, here are four places where Fragments prove useful.

• Dealing with device form-factor differences. The Activity class is often thought of as the main UI class in Android.
• Passing information between app screens.
• User interface organization.
• Advanced UI metaphors.

What is the use of fragment in Android?

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.

What is the difference between activity and fragment in Android?

Activity is the UI of an application through which user can interact and Fragment is the part of the Activity, it is a sub-Activity inside activity which has its own Life Cycle which runs parallel to the Activities Life Cycle. To read more refer to Activity Lifecycle in Android with Demo App.

Should I bind a service to an activity or a fragment?

Bind the Service to your activity and not the Fragment. The description of your application, one activity with multiple Fragment that are swapped in and out, makes this the most (and really only) practical approach. When you bind a Service to an Activity you are tying its lifecycle to that of the Activity.

How do I access a fragment from an activity?

A fragment takes on the context of the host activity, which is accessed with the getActivity() method. You can then interact with the service through the activity. Trying to bind to every fragment and activity is a mess. – Rarw

What is a fragment in a UI?

A fragment has its own layout and its own behavior with its own lifecycle callbacks. You can add or remove fragments in an activity while the activity is running. You can combine multiple fragments in a single activity to build a multi-pane UI.