So, You Want To Be An Android Developer?

Core concepts on Android and tips/advice about learning Android.

Transcript

1. So, You Want To Be An Android Developer? Alex Fu
2. Core Concepts
3. Activities An Activity is a single, focused thing that the user can do. • Represents a single screen • Provides a window for your UI • Activity.setContentView() • Entry point for interacting with the user
4. Activities An Activity is a single, focused screen that the user can use. • Represents a single screen • Provides a window for your UI • Activity.setContentView() • Entry point for interacting with the user
5. Fragments A Fragment is a piece of an application's user interface or behavior that can be placed in an Activity. • Represents a portion of the screen
7. Fragments A Fragment is a piece of an application's user interface or behavior that can be placed in an Activity. • Represents a portion of the screen • Must be embedded in an Activity • Attached via FragmentTransaction • Are reusable
8. Fragments A Fragment is a reusable piece of user interface and/or behavior. • Represents a portion of the screen • Must be embedded in an Activity • Attached via FragmentTransaction • Are reusable
9. Views A View is the basic building block for UI components. • Represents a UI element • Responsible for drawing and event handling (i.e. touch events) • Used to create interactive UI components (i.e. buttons, text fields, etc…)
10. Lifecycles A lifecycle is series of changes in the lifetime of an app. • Applies to Activities, Fragments, Services, etc… • Notifies developer when state changes • Not all lifecycles are equal
11. Context A Context provides an interface to your application environment. • Applies to Activities, Fragments, Services, etc… • Provides access to resources (i.e. images, text, etc…) • Context.getString() or Context.getDrawable() • Provides access to system services (i.e. NotificationManager) • Context.getSystemService() • Used to start Activities and Services • Context.startActivity() or Context.startService() • Used everywhere • Tied to lifecycle
12. Manifest The manifest provides essential information about your app to the Android system. • Is a file named AndroidManifest.xml • Describes components of the applications such as Activities, Services, etc… • Declare app permissions such as internet, camera, GPS, etc…
13. Tips, Pointers, Advice…
14. Be familiar with Java/Kotlin.
15. Avoid using libraries.
16. Experiment.
17. Sleep.
18. Resources • Android Application Fundamentals • https://developer.android.com/guide/components/fundamentals.html • Android Development for Beginners • https://in.udacity.com/course/android-development-for-beginners--ud837