What is the lifecycle of foreground activity in Android?
The activity lifecycle: the foreground lifetime. The activity gets launched, and the onCreate() and onStart() methods run. The onResume() method runs after the onStart() method. It gets called when the activity is about to move into the foreground.
What is the life cycle of services in Android?
Q 18 – What is the life cycle of services in android? A – onCreate−>onStartCommand−>onDestory B – onRecieve C – final D – Service life cycle is same as activity life cycle.
How many methods are there in an activity lifecycle?
In general, activity lifecycle has seven callback methods: onCreate() onStart() onResume()
What is the life cycle of services in Android Mcq?
Explanation. Service life cycle is as onCreate()−>onStartCommand()−>onDestory(). Q 19 – On which thread services work in android?
What is allow foreground activity?
A started Service or Activity which user can see and interact is said to be in a foreground state, and the system considers it to be something the user is actively aware of and thus not a candidate for killing when low on memory. The flappy bird activity is foreground because you can see it and interact with it.
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 the life cycle of service?
The service lifecycle consists of five stages namely – service strategy, service design, service transition, service operation and continual service improvement. Service strategy is at the core of the lifecycle.
Why service is used in Android?
Android service is a component that is used to perform operations on the background such as playing music, handle network transactions, interacting content providers etc. It doesn’t has any UI (user interface). The service runs in the background indefinitely even if application is destroyed.
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.
How many types of activity are there in Android?
Three of the four component types—activities, services, and broadcast receivers—are activated by an asynchronous message called an intent. Intents bind individual components to each other at runtime.
Is onResume always called?
onResume() will always be called when the activity goes into foreground, but it will never be executed before onCreate() .
When onPause method is called in Android?
onPause. Called when the Activity is still partially visible, but the user is probably navigating away from your Activity entirely (in which case onStop will be called next). For example, when the user taps the Home button, the system calls onPause and onStop in quick succession on your Activity .
What are the main two types of thread in Android?
Threading in Android
- AsyncTask. AsyncTask is the most basic Android component for threading. …
- Loaders. Loaders are the solution for the problem mentioned above. …
- Service. …
- IntentService. …
- Option 1: AsyncTask or loaders. …
- Option 2: Service. …
- Option 3: IntentService. …
- Option 1: Service or IntentService.
What is Android ViewGroup?
A ViewGroup is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers. This class also defines the ViewGroup. Android contains the following commonly used ViewGroup subclasses: LinearLayout.
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.