When you use this new implicit Intent to start an Activity, Android will — at run time — resolve it into the class best suited to performing the action on the type of data specifi ed.

Unlike programming paradigms in which apps are launched with a main() method, the Android system initiates code in an Activity instance by invoking specific callback methods that …

The Android ecosystem An open source platform for mobile, embedded and wearable devices Google is the principle maintainer Other companies contribute to the system. Each device …

Assume you are developing an Android app which consists of two activities, MainActivity and SecondActivity. The following image includes part of MainActivity code.

Android Activity Manager (am) Cheat Sheet by Ryan Johnson (CITguy) via cheatography.com/138/cs/870/

There is a sequence of callback methods that start up an activity and a sequence of callback methods that tear down an activity as shown in the below Activity life cycle diagram.

The “Main Activity” is the main entry of execution for your Android Application. Furthermore, since the Main Activity automatically pairs to the layout of your application, this will likely be the main …