Android is an open source mobile operating system based on a modified version of Linux that was developed by Android Inc. and later acquired by Google. It allows developers to create both native apps using Java or Kotlin, as well as hybrid apps that can run on multiple platforms like Android and iOS. Developing Android apps requires learning Java or Kotlin, understanding Android architecture like activities and services, and using tools like Android Studio and the Android SDK to build, test, and debug apps on real Android devices.

1. Android Development
Getting to Know More About Android Dev

2. What is Android?
• Android is a mobile OS based on a modified version of
Linux.
• Was developed by a startup Android , Inc.
• In 2005 Google purchased it and took over it’s
development work and team.

3. Features Of Android
• Storage – SQLite, a lightweight relational Database, for Data storage.
• Connectivity – GSM/EDGE, IDEN, CDMA, EV-DO, UMTS, Bluetooth, Wi
Fi, LTE and WiMAX.
• Messaging – Both SMS and MMS
• Hardware Support – Accelerometer sensor, camera, digital compass,
proximity sensor and GPS.
• Multi-touch – Multi-touch screens.
• Multi-tasking – Multi-tasking applications
• Tethering – Sharing of Internet connections as a wired/ wireless
hotspot.c

4. Native And Hybrid Apps
Native app development
• A native mobile app is an application created
for use in a single device i.e android, iOS,
Windows in it’s native language:
• iOS (Objective-C or Swift)
• Android( Java or Kotlin)
• Windows phone( C#)
Hybrid app development
• A hybrid app is created as a single app for use
on multiple platforms like android , iPhone,
and Windows.
• It is a single product that works on many Oss
• It is basically a web-based program put in a
native app shell and connected to the device
hardware

5. Obtaining The Required Tools
• The most Needed softwares are Android studio / Intellij IDEA
• After getting the software , you can use the sdk manager to download
and install versions of the android sdk.
• Having many versions of sdk enables you to write programs that
target different deices.

6. Languages one should learn
• One can consider to learn the following languages for android
development
• Java – is the official language for android dev and supported by
android studio.
• Kotlin – Was introduced 2019 to represent java as the official
language.
• Kotlin is similar to java in many ways but little easier to get your haed
around

7. Material Design
• Material design is a design language created by google android’s new
OS Summer 2014.
• The spec primarily focuses on touch-based mobile app design it
should be possible to extrapolate the same ideas into web design.

8. Color Guidelines
• The material design color system uses an organized approach to
applying color to UI.
• In this system a primary and secondary color to represent your brand

9. TIP
Accessibility and Internationalization
• If your goal is to make an app that goes viral and get used by millions
of users you should think about accessibility and internationalization.

10. Activities
• An activity is the entry point for interacting with the user.
• Represents a single screen with user interface i.e email app might
have one activity that shows a list of new emails, another one for
composing emails.
• Activities work together to form a cohesive user experience in the
email app, each one is independent of the other.

11. TIP
Why run apps on a hardware device
• When building an android app, it’s important that you always text
your app on a real device before releasing it to users.

12. FLUTTER
• Flutter is an open-source, multi-platform mobile SDK which can be
used to build IOS and android apps with e the same source code using
dart language.