JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MOBILE APPLICATION DEVELOPMENT Previous Question Paper (February - 2023 - R18)

Android tools are a comprehensive suite of software utilities and development environments provided by Google to facilitate the design, development, testing, and debugging of Android applications. These include the Android SDK (Software Development Kit) for core libraries and APIs, Android Studio as the official Integrated Development Environment (IDE), and command-line tools like ADB (Android Debug Bridge) for device communication.

The Activity Lifecycle in Android is managed by a series of callback methods that the system invokes as an activity transitions through different states. These methods allow developers to manage resources, save state, and handle user interactions effectively.

• onCreate(): Called when the activity is first created; used for static setup like initializing UI components and binding data.
• onStart(): Called when the activity becomes visible to the user.
• onResume(): Called when the activity starts interacting with the user; the activity is now in the foreground.
• onPause(): Called when the system is about to start or resume another activity; used to commit unsaved changes or pause animations.
• onStop(): Called when the activity is no longer visible to the user.
• onRestart(): Called after the activity has been stopped and is being started again.
• onDestroy(): The final call received before the activity is destroyed, either due to finishing or system resource reclamation.