Android-android Basic Summary

Android Basics Overview

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1. DefinitionThe first truly developed integrated platform for mobile devices, with operating systems, user interfaces, and applications, all running on mobile phones, eliminates the barriers to mobile innovation.
2. Main sections Hardware: location-based service hardware (such as GPS), camera, audio, network connectivity, Wi-Fi, Bluetooth, sensors (including accelerometers), NFC, touchscreen, and power management. Location Services: maps, geocoding (geocoder) [Geocoding (geocoding), geo-inverse coding (reverse geocoding)], location-based services. Background services: Service, Notification Manager (4 kinds): Audio alarm, cause vibration, led flashing, notification icon. Database:sqlite relational database, Content provider database sharing. sharing data and inter-program communication:Intent the mechanism for passing messages, Content provider applications accessing private databases. Enhanced Home screen:widgets and live wallpaper. image Processing and multimedia support:2D canvas drawing, 3D OpenGL drawing, Multimedia library (image, audio, video). C2DM:Android Cloud to Device Messaging (C2DM) clouds-to-devices communication. optimize memory and management processes:Dalvik The virtual machine, the lifecycle of the management process.
3. Application Architecture1. Activity Manager and Fragment manager2. View3. Notification Manager4. Content Provider5. Resource Manager6. Intent

Android-android Basic Summary