Difference between Activity and FragmentActivity
I was working on fragments and came across two things Activity and FragmentActivity which are used several times. I want to know that is there any difference between these two, because when I changed Activity with FragmentActivity, it had no effect on the app.
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. Just make sure you change all calls to getLoaderManager() and getFragmentManager() to getSupportLoaderManager() and getSupportFragmentManager() respectively.
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.v4.app.Fragment instead of the platform default Activity and android.app.Fragment classes. Using the platform defaults mean that you are relying on whatever implementation of fragments is used in the device you are running on. These are often multiple years old, and contain bugs that have since been fixed in the support library.
minSdkVersion of support library is 14 since version 26.x.x.
Follow WeChat
Success story sharing
Want to stay one step ahead of the latest teleworks?
Subscribe Now相似问题
- How can I save an activity state using the save instance state?
- Fling gesture detection on grid layout
- How to stop EditText from gaining focus when an activity starts in Android?
- What is the difference between px, dip, dp, and sp?
- What is the difference between match_parent and fill_parent?
- What's the difference between commit() and apply() in SharedPreferences
- Fragment MyFragment not attached to Activity
- Dilemma: when to use Fragments vs Activities:
- What is the difference between compileSdkVersion and targetSdkVersion?
FragmentActivityinherits thegetLoaderManagerandgetFragmentManagermethods fromActivityand as a result the compiler won't complain. Chances are you are importing the incorrectLoaderManagerandFragmentManagerclasses too. Make sure you are importing these classes from the support package (android.support.v4.app), not the Android SDK (android.app).Activityif you are usingandroid.app.Fragment; useFragmentActivityif you are usingandroid.support.v4.app.Fragment. Never attach aandroid.support.v4.app.Fragmentto aandroid.app.Activity, as this will cause an exception to be thrown.Fragmentsin an application). Then, continue on to this tutorial (how to make use of theFragments from the support package). The documentation on the developers site is worth reading as well.