What is the use of getApplicationContext in Android?
getApplicationContext(): It is used to return the context which is linked to the Application which holds all activities running inside it.
When would you call getApplicationContext () and why?
You only use getApplicationContext() when you know you need a Context for something that may live longer than any other likely Context you have at your disposal. Scenarios include: Use getApplicationContext() if you need something tied to a Context that itself will have global scope.
What is the difference between this and getApplicationContext?
this refers to the MainActivity context which extends Activity class but the base class ( Activity ) also extends Context class, so it can be used to offer activity context. getBaseContext() offers activity context. getApplication() offers application context. getApplicationContext() also offers application context.
What thread services work on Android?
In Android, a Service is an application component that can perform long-running operations in the background on the UI thread.
How do I get getApplicationContext?
Do this: In the Android Manifest file, declare the following. Now everywhere call MyApplication. getAppContext() to get your application context statically.
How do I get context of another activity?
Rules:
- Use getContext() or Activity.
- Use getApplicationContext() if you need application-level context, which is not tight to any views/activities (for instance, in BroadcastReceiver or Service)
- Do not use getBaseContext().
- Make use of WeakReference if you need to access context from inside the threads.
What is MainActivity this in Android?
In Mobile SDK apps, the main activity begins immediately after the user logs in. Once the main activity is running, it can launch other activities, which in turn can launch sub-activities. The template app’s MainActivity class extends the abstract Mobile SDK activity class, com. …
What is getBaseContext in Android?
getBaseContext() is the method of ContextWrapper . And ContextWrapper is, “Proxying implementation of Context that simply delegates all of its calls to another Context. Can be subclassed to modify behavior without changing the original Context.” (as per javadocs)..
Can I use fragment without activity?
Fragment can’t be initiated without Activity or FragmentActivity. As soon as you create an instance of the Fragment class, it exists, but in order for it to appear on the UI, you must attach that fragment to an activity because a fragment’s lifecycle runs parallel to an activity’s lifecycle.
Where is the getapplication method located in Android?
The getApplication () method is located in the Activity class, that’s why you can’t access it from your helper class. If you really need to access your application context from your helper, you should hold a reference to the activity’s context and pass it on invocation to the helper.
When do you need to use application context in Android?
When your android application grows, there are a lot of util classes. And sometimes you need to use android application context in those classes to do something like create a Toast message or create a Snackbar popup.
When to use getbasecontext instead of current activity?
Use this instead of the current Activity context if you need a context tied to the lifecycle of the entire application, not just the current Activity. ContextWrapper.getBaseContext(): If you need access to a Context from within another context, you use a ContextWrapper.
Which is the nearest context in sample application?
It can be seen in the above image that in “Sample Application”, nearest Context is Application Context. In “Activity1” and “Activity2”, both Activity Context (Here it is Activity1 Context for Activity1 and Activity2 Context for Activity2) and Application Context.The nearest Context to both is their Activity Context only.