There are mainly two types of context are available in Android. Activity refers to an individual screen and Application refers to the whole app and both extend the context class. In android, context is the main important concept and the wrong usage of it leads to memory leakage. Both the Activity and Application classes extend the Context class. The context for the respective screen helps to get hold of database data and the shared data across screensĤ.
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Rest Services usually hold database data and provide the output in JSON format to the android app. Via Rest services, API calls can be consumed in android apps. It is used to get access to resources, databases, and shared preferences, etc. The inquiry screen’s context specifies that the user is in inquiry activity, and he/she can submit queries related to the appģ. It is used to get information about the activity and application. So when the user is searching for something, the context is an inquiry screen in this case.Ģ. Usually, the app got multiple screens like display/inquiry/add/delete screens(General requirement of a basic app). It is the context of the current/active state of the application. Right? So here the room-service person is the context considering you are the single activity and the hotel to be your app, finally, the breakfast, lunch & dinner have to be the resources. So how does he get these things? He will ask the room-service person to bring these things for him. Except for these things there are also many other things, he wants to do during the time of stay. He needs breakfast, lunch, and dinner at a suitable time. Understanding Context by a Real World Example
It allows access to application-specific resources and classes, as well as up-calls for application-level operations such as launching activities, broadcasting and receiving intents, etc. This is an abstract class whose implementation is provided by the Android system. Interface to global information about an application environment. In the official Android documentation, context is defined as:
It gives you information about your app environment.It allows us to interact with other Android components by sending messages.We can break the context and its use into three major points: Similarly when we talk about the Android Programming context can be understood as something which gives us the context of the current state of our application. It is very important to understand the environment which we want to understand.The context tells us about the surrounding information.Looking at this definition we come across two things: The circumstances that form the setting for an event, statement, or idea, and in terms of which it can be fully understood
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