Android Fundamentals I

Capacitacón Fundamentos Básicos de Android

Transcript

1. Android Application Fundamentals I By : Luis Alonso Paulino Flores
2. Android Base Components ❖ ACTIVITIES ❖ CONTENT PROVIDERS ❖ BROADCAST RECEIVERS ❖ SERVICES
3. Activities And … tell me, how much do you know about activities?
4. Activities An activity represents a single screen with a user interface.
5. Activities
6. Activities - Fragments Starting with HONEYCOMB, Activity implementations can make use of the Fragment class to better modularize their code, build more sophisticated user interfaces for larger screens, and help scale their application between small and large screens.
7. Activities - Fragments Fragments Lifecycle
8. Activities - Intent An Intent is a messaging object you can use to request an action from another app component.
9. Activities - Intents Interaction
10. Activity - Context Interface to global information about an application environment.
11. Activities - Context What exactly is Context?
12. Activities - User Interface Components
13. Activities - User Interface Components Common Layouts - LinearLayout - RelativeLayout - FrameLayout - WebView - CoordinatorLayout - ConstraintLayout Building Layouts using Adapter - ListView - GridView - RecyclerView Others - ScrollView - NestedScrollView
14. Any questions?
15. Activities - Code Namings A subclass of Activity must be named like: [Name]Activity A subclass of Fragment must be named like: [Name]Fragment An xml that is the content view of Activity: activity_[name] An xml that is the content view of Fragment: fragment_[name]
16. Activities - Best Practices • Be careful, Android isn’t Java, Java isn’t Android. • Respect android conventions. • Every attributes of an Android Component must have the letter “m” as a prefix. • Every static final constants must be in capital letter using “_” between words. • Be careful when you are going to use the Application Context or your Activity as a Context. • Google is your friend, read the docs! • Try to use fragments and use Activity as a container for them. Sometimes it’s difficult, but is the correct way. • Research, research, research and research :)