Can we do an activity without the UI in Android?

Can we create activity without UI in Android?

mentioned by Brian515 works great. This method is useful for creating an entry point Activity that decides on which activity to call, start, services, etc without having to show a UI to the user. Remember to use finish() after you have started your intent.

Is it possible to have activity without UI?

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

Can I create activity without XML file?

1) Right click on your package name in which you want to create Activity. 2) Move your mouse cursor to New->Activity->Empty Activity.

Does an Android app need an activity?

The reason to make an App with no activity or service could be making a Homescreen Widget app that doesn’t need to be started. Once you start a project don’t create any activities. After you created the project just hit run. Android studio will say No default activity found .

What are interfaces in Android?

The user interface (UI) for an Android app is built as a hierarchy of layouts and widgets. The layouts are ViewGroup objects, containers that control how their child views are positioned on the screen. Widgets are View objects, UI components such as buttons and text boxes.

What is the difference between services and thread in Android?

Service : is a component of android which performs long running operation in background, mostly with out having UI. Thread : is a O.S level feature that allow you to do some operation in the background.

What is Android ViewGroup?

A ViewGroup is a special view that can contain other views. The ViewGroup is the base class for Layouts in android, like LinearLayout , RelativeLayout , FrameLayout etc. In other words, ViewGroup is generally used to define the layout in which views(widgets) will be set/arranged/listed on the android screen.

What is the life cycle of foreground activity in Android?

Activity Lifecycle

Lifecycle Method Description
onCreate() The activity is starting (but not visible to the user)
onStart() The activity is now visible (but not ready for user interaction)
onResume() The activity is now in the foreground and ready for user interaction

How are layouts placed in Android?

Layout files are stored in “res-> layout” in the Android application. When we open the resource of the application we find the layout files of the Android application. We can create layouts in the XML file or in the Java file programmatically. First, we will create a new Android Studio project named “Layouts Example”.

How can I move one fragment to another activity in Android?

“move from fragment to another activity in android” Code Answer’s

  1. //going to another activity while ending the.
  2. //previous one so that users cannot go back.
  3. btListe = (ImageButton)findViewById(R. id. …
  4. btListe. …
  5. { public void onClick(View v)
  6. {
  7. intent = new Intent(main. …
  8. startActivity(intent);

What is the main component in Android?

Android applications are broken down into four main components: activities, services, content providers, and broadcast receivers. Approaching Android from these four components gives the developer the competitive edge to be a trendsetter in mobile application development.

Like this post? Please share to your friends:
OS Today