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Android Study Jams

Android Basics: Sessions 1 & 2

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Android Study Jams

Android Basics: Session 1

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Basic computer literacy

Basic math skills

Computer & headphones

Internet connection

(Optional) Android device & USB cable

Prerequisites

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1. Why are you here?

2. What are you goals?

3. How do you plan to achieve them?

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Who would like to share?

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Learning Objectives

Build your first Android apps

Set up Android Studio on your computer

Learn the basics of the Kotlin programming language

Discover resources to continue learning

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Today’s Schedule

TOPIC	TIME
Presentation	12:00 - 12:15
Pathway 1: Introduction to Kotlin	12:15 - 1:15
Break	1:15 - 1:30
Pathway 2: First Android App	1:30 - 3:30
Pathway 3: Build a Basic Layout	3:30 - 4:30
Celebrate

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Let’s look at the schedule for this session. [Please update this schedule accordingly before your event. If attendees install Android Studio beforehand, then you can shorten the time allowed for Pathway 2.]

First, we have a short presentation, which we’re doing right now. We’re covering some logistics and a high-level introduction to the concepts, to help you with the hands-on portion of the session later.

Once I’m done talking, you’ll be able to dive into the course. You’ll be working independently on 3 pathways in the first unit of the course. This is just a suggested schedule. You can work through the pathways at your own pace and let me or any of the other facilitators know if you have questions. We’ll also have a short break in between. At the end of the session, I’ll bring everyone together and we can recap what we learned today and celebrate your progress!!

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Android Basics

in Kotlin Course

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Unit 1: Kotlin Basics

For Android

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A Pathway

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Take a Quiz

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Earn badges!

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Developer profile

Carrie Sawyer

Photo by Christopher Campbell on Unsplash

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Concept Overview

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Use Kotlin to start writing Android apps

Kotlin helps developers be more productive

Kotlin Programming Language

Pathway 1

Pathway 2

Pathway 3

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Write and run Kotlin

code in the browser

Kotlin Playground

Pathway 1

Pathway 2

Pathway 3

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Official tool to build Android apps

Android Studio

Pathway 1

Pathway 2

Pathway 3

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Android Emulator

Emulate an Android device on your computer.

Run your app on the emulator

Pathway 1

Pathway 2

Pathway 3

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The part of your app where

the user interacts with it

User Interface

Pathway 1

Pathway 2

Pathway 3

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Layouts

Views

Layouts

Aa

Button

Pathway 1

Pathway 2

Pathway 3

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TextView

ImageView

Button

Hello Android!

Views

Pathway 1

Pathway 2

Pathway 3

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Let’s get started

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Start here:

g.co/android/basics

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Unit 1

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Have a Question? Just ask

Go to g.co/android/basics

Start Android Basics in Kotlin Course

Work on Unit 1, Pathway 1

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Break

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Have a Question? Just ask

Work on Unit 1, Pathways 2 & 3

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Welcome back

And congrats!

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Share what you’ve

learned with #AndroidStudyJams

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Stay tuned for Session 2

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Android Study Jams

Android Basics: Session 2

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Completed Pathways 1 - 3 in Unit 1 of Android Basics in Kotlin course

Computer & headphones

Android Studio installed

Internet connection

(Optional) Android device & USB cable

Prerequisites

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Recap from last time

What did we learn?

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Unit 1

Pathway 4

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Earn a new badge!

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Today’s Schedule

TOPIC	TIME
Presentation	12:00 - 12:15
Pathway 4: Add a button to an App	12:15 - 1:00
Break	1:00 - 1:15
Pathway 4 (continued)	1:15 - 2:00
Break	2:00 - 2:15
Pathway 4 (continued)	2:15 - 3:00
Celebrate

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Concept Overview

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An activity provides the window in which the app draws its UI.

Activity

MainActivity

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Class and object instances

A class is like a blueprint, which contains instructions for how to create something.

�An object instance is an actual Dice that’s created from the blueprint.

Object instance

A second object instance

A third object instance

Dice class

This work is licensed under the Apache 2.0 License

As you write Kotin code for your app, you’ll need to understand what classes and objects are. You can think of a class like a blueprint. It contains instructions for how to create something. From the Dice blueprint, you can create actual Dice.

More specifically, the Dice class contains details like what properties a Dice has (e.g. number of sides) and how it behaves (e.g. it can be rolled). The great advantage of having the Dice class is now you can create as many Dice object instances as you want, as shown in the diagram. It saves time from having to write all the same code over and over again. This makes your code more organized and easier to maintain.

[Optional: You could also use this analogy. A blueprint of a house contains the instructions of how to create the house. But the blueprint is not the house itself. The actual house is the object instance, and you can create multiple house object instances from the same blueprint.]

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Let’s get started

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Stuck? Ask for help

Go to g.co/android/basics

Start Android Basics in Kotlin Course

Work on Unit 1, Pathway 4

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Break

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Stuck? Ask for help

Work on Unit 1, Pathway 4

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Welcome back

And congrats!

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Let’s Play!

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[This activity is designed for in-person meetings.]

Let’s play a game where you get to use the Dice Roller app you just created! This is a twist on a group rock paper scissors game you may have played.

Pair up and hit the Roll button on your own app at the same time.

Whoever has a higher roll, wins.

Whoever loses cheers on the winner, as they play against their next component.

If you tie, play against the same person again.

The game keeps going until there are only 2 people in the room left to play each other, with everyone else cheering each side on, until a grand winner is declared!

[If some people didn’t finish the app, that’s totally okay. They can Google “Random number between 1 and 6” and it will do the same thing.]

[If you’re meeting virtually, instead of playing the game, you can have folks share how they would extend the app by adding additional features. Or you can have them share if they thought of any future app ideas from building this one.]

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Share what you’ve

learned with #AndroidStudyJams

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Learn More

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Continue learning!

Keep coming back to Study Jams!

Learn on your own by going through Android Basics in Kotlin Course .

Modify your existing apps and add more features to them.

Additional resources to check out:

Official Android Developers Site: developer.android.com
Learn Kotlin By Example
Official Android Developers Blog (for announcements)
Android Developers Medium Blog (for more technical articles)
Android Developers YouTube channel
Follow @AndroidDev on Twitter
Subscribe to the Android Developer Newsletter

This work is licensed under the Apache 2.0 License

First, you can keep coming to Study Jams as we cover more topics to make you a full fledged Android developer.

Second, you can continue learning on your own with the Android Basics in Kotlin course.

Third, you can modify the apps we built together and learn by adding more features to them. You can use Google search or look at existing code samples and videos online for how to add additional features to your app.

To stay connected, check out these additional resources, which professional developers use to stay up to date on Android. As you get into more advanced features, you will likely need to learn more programming concepts. You can check out the Learn Kotlin By Example resource for that.

Thank you so much for being a part of Android Study Jams! Good luck on the beginning of your Android developer journey!