What is a context in Android Mcq?
Q 9 – What is a context in android ? A – It is an interface to store global information about an application. B – It is used to create new components. C – Android has two contexts, those are getContext and getApplicationContext.
What is an activity in Android Mcq?
A) An activity is a window that contains the user interface of your application. … An application can have zero or more activities. C) An application can have only one activity. D) Option A and B are correct.
What is the main component 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.
What is pending intent in Android Mcq?
Pending Intent is fired or triggered at a future point of time.
What are the main components in Android?
There are four main Android app components: activities , services , content providers , and broadcast receivers . Whenever you create or use any of them, you must include elements in the project manifest.
Is it possible activity without UI in Android?
The answer is yes it’s possible. Activities don’t have to have a UI. It’s mentioned in the documentation, e.g.: An activity is a single, focused thing that the user can do.
What is the package name of HTTP client in Android?
Android includes two HTTP clients: HttpURLConnection and Apache HTTP Client. Both support HTTPS, streaming uploads and downloads, configurable timeouts, IPv6 and connection pooling.
What is broadcast receiver in android?
Definition. A broadcast receiver (receiver) is an Android component which allows you to register for system or application events. All registered receivers for an event are notified by the Android runtime once this event happens.
How do you kill an activity?
Launch your application, open some new Activity, do some work. Hit the Home button (application will be in the background, in stopped state). Kill the Application — easiest way is to just click the red “stop” button in Android Studio. Return back to your application (launch from Recent apps).
What is dx tool?
The dx tool lets you generate Android bytecode from . class files. The tool converts target files and/or directories to Dalvik executable format (. dex) files, so that they can run in the Android environment. It can also dump the class files in a human-readable format and run a target unit test.
What are interfaces in Android?
Interfaces are a collection of constants, methods(abstract, static, and default), and nested types. All the methods of the interface need to be defined in the class. The interface is like a Class.
What is ANR Android?
When the UI thread of an Android app is blocked for too long, an “Application Not Responding” (ANR) error is triggered. If the app is in the foreground, the system displays a dialog to the user, as shown in figure 1. The ANR dialog gives the user the opportunity to force quit the app.
How do you pass intent?
Intent intent = new Intent(getApplicationContext(), SecondActivity. class); intent. putExtra(“Variable name”, “Value you want to pass”); startActivity(intent); Now on the OnCreate method of your SecondActivity you can fetch the extras like this.
What is the life cycle of broadcast receivers in Android?
When a broadcast message arrives for the receiver, Android calls its onReceive() method and passes it the Intent object containing the message.
What is an intent filter in Android?
An intent filter is an expression in an app’s manifest file that specifies the type of intents that the component would like to receive. For instance, by declaring an intent filter for an activity, you make it possible for other apps to directly start your activity with a certain kind of intent.