Whats the difference between activity and fragment?

Activity is the part where the user will interacts with your application. Fragment represents a behavior or a portion of user interface in an Activity. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities.

What is the relationship between activity and fragment?

Relationship Between an Activity and a Fragment A fragment must always be hosted in an activity and a fragment’s lifecycle is directly affected by the host activity’s lifecycle. For example, when an activity resumes so will all of its fragments and when the activity pauses so will all of the fragments.

What is the difference between activity and services in Android?

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 the key difference between a service and an activity?

Activity is a GUI and service is non-gui thread which can run in the background. Some more details here. IntentService is running in background while service is running on GUI thread.

What is an android 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.

What are fragments in Android?

Fragment is an Android programming aspect that represents a portion of the user interface of what a user sees on the application window. The Android documentation describes Fragment as a portion of user interface in an Activity Object.

How to use context in a fragment?

getContext () method helps to use the Context of the class in a fragment activity. This way you can be sure that context will always be a non-null value. You can call getActivity () or, You have different options: If your minSDK <= 21, then you can use getActivity (), since this is a Context.

What is Android activity life cycle?

Android Activity Lifecycle is controlled by 7 methods of android.app.Activity class. The android Activity is the subclass of ContextThemeWrapper class. An activity is the single screen in android. It is like window or frame of Java.