Table of Contents
- 1 When would you use an AsyncTask in a BroadcastReceiver?
- 2 Is LocalBroadcastManager deprecated?
- 3 What is the life cycle of broadcast receivers in Android?
- 4 Can a user save all database updates in onStop () Mcq?
- 5 Which of the following methods is used to close an activity?
- 6 What is breakpoint in Android Mcq?
When would you use an AsyncTask in a BroadcastReceiver?
When should I use What ? AsyncTask: If your business logics need to be completed in 10Secs or it’s just a information fetching from internet like “fetching some result”, “sending messages through API”, “Fetching cricket score” etc.
What is BroadcastReceiver in Android with example?
Android BroadcastReceiver is a dormant component of android that listens to system-wide broadcast events or intents. When any of these events occur it brings the application into action by either creating a status bar notification or performing a task.
Why we use broadcast receiver in android?
Broadcast receiver is an Android component which allows you to send or receive Android system or application events. For example, applications can register for various system events like boot complete or battery low, and Android system sends broadcast when specific event occur.
Is LocalBroadcastManager deprecated?
androidx. localbroadcastmanager is being deprecated in version 1.1. 0-alpha01 . LocalBroadcastManager is an application-wide event bus and embraces layer violations in your app; any component may listen to events from any other component.
Why is LocalBroadcastManager deprecated?
The decision to deprecate LocalBroadcastManager LocalBroadcastManager being a application wide event-bus, any component could catch what it was broadcasting. It had unnecessary use-case limitation because it inherited BroadcastManager and had to involve Intent s even when they were unnecessary.
How do I protect my broadcast receiver?
If the Broadcast Receiver is registered in the app’s AndroidManifest. xml file, then setting a permission using the android:permission attribute in the <receiver> element, will restrict access to the Broadcast Receiver to only those apps that have requested and been granted that permission.
What is the life cycle of broadcast receivers in Android?
Declare broadcast receiver in manifest to achieve independent life cycle for it. Only onReceive() method is called in BroadcastReciver’s life cycle. A BroadcastReciever life cycle ends (ie stop receiving broadcast) when you unregister it. usually you would do this in the onPause/onStop method.
How do I keep my service alive android?
Keeping your app alive
- Start your Service with Context. startService()
- Call Service. startForeground() as soon as possible in onStartCommand().
- Return START_STICKY from onStartCommand() to make sure you get restarted by the system in case your app still gets killed at a low-memory situation.
Is it possible activity without UI in Android Mcq?
Explanation. Generally, every activity is having its UI(Layout). But if a developer wants to create an activity without UI, he can do it.
Can a user save all database updates in onStop () Mcq?
Yes, a user can save all database updates in onStop()
Which method is used to close an activity Mcq?
Explanation: The finish() method is used to close the activity.
Which method is used to close an activity destroy close stop finish?
Activity stopped: the onStop() method The Android system retains the activity instance in the back stack, and if the user returns to the activity, the system restarts it. If resources are low, the system might kill a stopped activity altogether. The system calls the onStop() method when the activity stops.
Which of the following methods is used to close an activity?
The Android onDestroy() is the method that is called when an activity finishes and the user stops using it. It is the final callback method received by activity, as after this it is destroyed.
Which method should you use to start a sub activity?
To start an activity, use the method startActivity(intent) . This method is defined on the Context object which Activity extends. The following code demonstrates how you can start another activity via an intent. # Start the activity connect to the # specified class Intent i = new Intent(this, ActivityTwo.
Which of the following lines of code starts activity activity2 from a current activity Activity1?
Intent intent = new Intent (Activity1.
What is breakpoint in Android Mcq?
Q 6 – What is breakpoint in android? A – Breaks the application B – Breaks the development code C – Breaks the execution. It is not mandatory, the program will work perfectly without fail, but the programmer has to implement the life cycle of activity.
What are the main components in Android Mcq?
Explanation: There are four main components that can be used within an Android application : Activities, Services, Broadcast Receivers and Content Providers. 2.