What is a BuildType in Gradle? And what can you use it for?īuild types define properties that Gradle uses when building and packaging your Android app. Why bytecode cannot be run in Android?Īndroid uses DVM (Dalvik Virtual Machine ) rather using JVM(Java Virtual Machine). ARMx86, is the least used for these three, since it is not battery friendly. ARM64 is an evolved version of that that supports 64-bit processing for more powerful computing. ARMv7 is the most common as it is optimised for battery consumption. There are 3 CPU architectures in Android. The activity context should be used when you are passing the context in the scope of an activity or you need the context whose lifecycle is attached to the current context. This context is tied to the lifecycle of an activity. Activity Context: This context is available in an activity. The application context can be used where you need a context whose lifecycle is separate from the current context or when you are passing a context beyond the scope of an activity. Application Context: This context is tied to the lifecycle of an application. Context is like a handle to the environment your application is currently running in. What is Context?Ī Context is a handle to the system it provides services like resolving resources, obtaining access to databases and preferences, and so on. The Application class, or any subclass of the Application class, is instantiated before any other class when the process for your application/package is created. The Application class in Android is the base class within an Android app that contains all other components such as activities and services. A set of questions that I have accumulated over the years in preparation for my many Android Interviews Prep.
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