What is LoaderManager?
What is LoaderManager?
What is the LoaderManager? Simply stated, the LoaderManager is responsible for managing one or more Loader s associated with an Activity or Fragment. Each Activity and each Fragment has exactly one LoaderManager instance that is in charge of starting, stopping, retaining, restarting, and destroying its Loaders.
What is the function of AsyncTaskLoader object?
This function is * called in a background thread and should generate a new set of * data to be published by the loader. */ @Override public List loadInBackground() { // Retrieve all known applications. List apps = mPm….loadInBackground.
| Returns | |
|---|---|
| D | The result of the load operation. |
What are the characteristics of a loader?
Loaders have these characteristics:
- They are available to every Activity and Fragment .
- They provide asynchronous loading of data.
- They monitor the source of their data and deliver new results when the content changes.
When onLoadFinished is called?
onLoadFinished(Loader, D) – called when a loader has finished loading data. onLoaderReset(Loader) – called when a previously created loader is being reset (when you call destroyLoader(int) or when the activity or fragment is destroyed , and thus making its data unavailable.
What does the Startmanagingcursor () function do?
Ok, the documentation states that it lets the Activity manage the cursor’s lifecycle.
What is the difference between adapter and loader in Android?
Both provide an abstraction for data access, but the Loader performs the query in the background whereas an Adapter executes in the current (presumably UI) thread. For example, a straightforward way to access a Content Provider is with a SimpleCursorAdapter.
What is onPostExecute?
Need of AsyncTask In Android: This class will executes everything in doInBackground() method inside of other thread which doesn’t have access to the GUI where all the views are present. The onPostExecute() method of this class synchronizes itself again with the main UI thread and allows it to make some updating.
What are characteristics of Android loaders?
Introduced in Android 3.0, loaders have these characteristics:
- They are available to every Activity and Fragment.
- They provide asynchronous loading of data in the background.
- They monitor the source of their data and automatically deliver new results when the content changes.
Why do we use loader in computer system?
In computer systems a loader is the part of an operating system that is responsible for loading programs and libraries. It is one of the essential stages in the process of starting a program, as it places programs into memory and prepares them for execution. (See memory-mapped file.)
