Android Services

 Service A Service is an application component that can perform long-running operations in the background and does not provide a user interface. Another application component can start a service and it will continue to run in the background even if the user switches to another application.  For example, play music, perform file I/O, or interact with a content provider, all from the background. Types of Services: It...

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Java Interface

Interface What is interface: Interface is similar to class.it is a collection of abstract method. Interface dont have defination. A class can implements an interface.thereby inheriting a abstract methods of the interface. Abstract methods an interface also contain constants,and default methods,static methods. Method body exits only for default methods and static methods. Interface can have any number of methods. You cant create object for interface. Interface dont not have constractor. An interface can extend multiple...

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