Android Development

• Java and Android Components (Activity, Service, BroadcastReceiver, ContentProvider, Fragment): Java is the main language for Android apps. Android components include Activities (for screens), Services (for background tasks), BroadcastReceivers (for receiving system messages), ContentProviders (for data sharing), and Fragments (for reusable UI parts). These components work together to create responsive and interactive mobile apps.
  • Android lifecycle
    • onCreate() Called when the Activity is first created; used for initializing components like layout and data.
    • onStart() Called when the Activity becomes visible but not yet in the foreground.
    • onResume() Called when the Activity is in the foreground and ready for user interaction; typically used for animations or refreshing UI.
    • onPause() Called when the Activity is about to leave the foreground; good for saving temporary data or stopping animations.
    • onStop() Called when the Activity is no longer visible; release resources not needed when off-screen.
    • onDestroy() Called before the Activity is destroyed, either from user action or system memory constraints; used for final cleanup.
    • onRestart() Called when restarting a stopped Activity; often used to re-initialize resources.
• Native Bridges, OkHttp, Retrofit: Native bridges let JavaScript work with native Android code, so apps can access hardware or system features. OkHttp is a tool for handling HTTP requests, and Retrofit, built on OkHttp, simplifies connecting to web APIs and managing data.
• RxJava, MVVM, MVP Patterns: RxJava helps manage data as streams, making it easier to handle complex tasks like loading and refreshing data. MVVM (Model-View-ViewModel) and MVP (Model-View-Presenter) are ways of organizing code to keep the UI and logic separate, making apps easier to maintain.

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