What is Appcompat activity?

androidx.appcompat.app.AppCompatActivity. Base class for activities that wish to use some of the newer platform features on older Android devices. Some of these backported features include: Using the action bar, including action items, navigation modes and more with the setSupportActionBar(Toolbar) API.

Why do we extend AppCompatActivity?

When you extend the android. AppCompatActivity class, you create a new kind of Android activity. The words extends AppCompatActivity tells Java that a MainActivity is, in fact, an example of an Android AppCompatActivity . That’s good because an AppCompatActivity is a certain kind of Android activity.

Can fragment extends AppCompatActivity?

Any activity using fragments should make sure to extend from FragmentActivity or AppCompatActivity : import androidx. appcompat. app.

Which is base class of AppCompatActivity?

AppCompatActivity was introduced into Android-SDK since the release of android support appcompat library. AppCompatActivity is the direct child class of FragmentActivity of support v4 and the direct parent class of ActionBarActivity .

What is difference between activity and AppCompatActivity?

The differences between them are: Activity is the basic one. Based on Activity , FragmentActivity provides the ability to use Fragment . Based on FragmentActivity , AppCompatActivity provides features to ActionBar .

What is AppCompat?

When new versions of android are published, Google will have to support the older versions of android. So AppCompat is a set of support libraries which can be used to make the apps developed with newer versions work with older versions. So the android actionbar will become androidsupport actionbar/ supportFragment etc.

Which event is called when activity is no longer visible to user?

onStop() This callback is called when the activity is no longer visible.

What is the difference between activity and fragment?

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. After using multiple fragments in a single activity, we can create a multi-screen UI.

How can we use multiple fragments in one activity?

Displaying Multiple Fragments in a Single Activity — Android

1. Step 1 — Create a base activity. The first step is to create a base activity which is gonna host the fragments which we need to display.
2. Step 2 — Edit the activity layout file.
3. Step 3 — Create Fragments.
4. Step 4 — Add fragment transaction codes.

Should I use activity or AppCompatActivity?

So basically, using AppCompatActivity is always the right choice. The differences between them are: Activity is the basic one. Based on Activity , FragmentActivity provides the ability to use Fragment .

What is the latest Appcompat version?

Appcompat

What is activity life cycle?

Activity Lifecycle: Activity is one of the building blocks of Android OS. In simple words Activity is a screen that user interact with. Every Activity in android has lifecycle like created, started, resumed, paused, stopped or destroyed. These different states are known as Activity Lifecycle.