What is the difference between AppCompatActivity and activity?
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 difference between fragment and FragmentActivity?
If you want to use Fragments in an app targeting a platform version prior to HoneyComb, you need to add the Support Package to your project and use the FragmentActivity to hold your Fragments . The FragmentActivity class has an API for dealing with Fragments , whereas the Activity class, prior to HoneyComb, doesn’t.
What is a FragmentActivity?
A FragmentActivity is a subclass of Activity that was built for the Android Support Package. The FragmentActivity class adds a couple new methods to ensure compatibility with older versions of Android, but other than that, there really isn’t much of a difference between the two.
What is the main purpose of MainActivity class?
MainActivity initializes the app’s UI and implements its UI buttons. The MainActivity UI includes a list view that can show the user’s Salesforce Contacts or Accounts. When the user clicks one of these buttons, the MainActivity object performs a couple of basic queries to populate the view.
What is Android Componentactivity?
Base class for activities that enables composition of higher level components. Rather than all functionality being built directly into this class, only the minimal set of lower level building blocks are included.
Is an AppCompat widget that can only be used with a theme AppCompat theme or descendant?
AppCompatTextView
AppCompatTextView is an AppCompat widget that can only be used with a Theme.
What is difference between onStart and onCreate?
onCreate() is called when the when the activity is first created. onStart() is called when the activity is becoming visible to the user.
What is the difference between activity and FragmentActivity?
FragmentActivity is part of the support library, while Activity is the framework’s default class. They are functionally equivalent. You should always use FragmentActivity and android. support.
What does MainActivity this mean?
MainActivity. this refers to the the current activity (context) where the getApplicationContext() refers to the Application class. The getApplicationContext() method return the context of the single, global Application object of the current process.
What is the difference between actionbaractivity and appcompatactivity in Android?
ActionBarActivity was in a moment the replacement to the Activity class because it made easy to handle the ActionBar in an app. AppCompatActivity is the new way to go because the ActionBar is not encouraged anymore and you should use Toolbar instead (that’s currently the ActionBar replacement).
What is appcompatactivity and how to use it?
AppCompatActivity is the new way to go because the ActionBar is not encouraged anymore and you should use Toolbar instead (that’s currently the ActionBar replacement). AppCompatActivity inherits from FragmentActivity so if you need to handle Fragments you can (via the Fragment Manager).
Should I use Actionbar or appcompatactivity for an app bar?
At the time of this writing (check the link to confirm it is still true), the Android Documentation recommends using AppCompatActivity if you are using an App Bar. Beginning with Android 3.0 (API level 11), all activities that use the default theme have an ActionBar as an app bar.
What is the difference between deprecated activity and appcompatdelegate?
Otherwise you can stay with deprecated activity and there will be no difference in behavior at all. Regarding AppCompatDelegate, it allows you to have new tinted widgets in an activity, which is neither AppCompatActivity nor ActionBarActivity.