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- Before creating your first Android Studio

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project, you'll need to make sure

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you've set up some basic software.

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As I've described previously, you'll need

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the Java Development Kit, or JDK, from Oracle.

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You also need to have installed and updated Android Studio.

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If you haven't gone through these steps yet,

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stop watching this video, and go back to the

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previous videos that describe how to set up the software.

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In this course, I'm using Android Studio 1.4,

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and I'm working with the version of the SDK

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for Android 6.0, or Marshmallow,

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which is known for the developer as API level 23.

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To create your first app, start in the

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Android Studio welcome screen,

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and click Start a New Android Studio Project.

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I'm going to name my application Hello World,

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and then I'll set the company domain

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starting with example.com.

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Any app that belongs to this particular

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domain can't be submitted to the Google Play Store,

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and so by using this, I'll make sure that

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it's always marked as a sample application.

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But my particular app is going to be

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a clothing catalogue for a fictional

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company named H Plus Sport, so I'm going to set

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the complete company name as hsport.example.com.

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That generates a package name,

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showed in dim characters below.

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The package name is also known as

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the app identifier, and it provides

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a global unique identity for the app,

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so only one app for each identity

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can be hosted on the Google Play Store

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or other distribution channels.

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If you like, you can customize the

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package name by clicking the Edit link,

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and I'm going to change my actual

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package name to hsport.catalog,

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and I'll use this same package name

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for all of the sample apps throughout this course,

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so that when I install a new app,

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it'll replace the old one on any particular device,

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and I won't end up with a whole bunch

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of different apps on the devices.

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Next I'll indicate where I'm creating my project on disk.

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The default is a folder named Android Studio Projects

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underneath my home folder.

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This is just a folder.

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It's not like an Eclipse workspace that contains

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configuration information.

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And if you prefer, you can place the project

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anywhere else on your hard disk.

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I'll Accept that location and click Next.

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On this screen, I'm asked what my Minimum SDK will be.

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The default is typically API 15,

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or Android 4.0.3 (IceCreamSandwich).

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If you want to support all of the current devices

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that are being tracked in the Google Play Store,

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you could instead choose API 8,

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for Android 2.2 or Froyo.

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But that would require a lot more development and testing

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on your part.

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You can click on this link to help you choose,

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but this information, in my experience,

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is usually a little bit out of date.

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To find better, more up-to-date information

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about current penetration statistics

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for different versions of Android,

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go to a browser.

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This is the screen where you can find out current usage

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rates on the Google Play Store.

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And you'll see that as of this date,

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Froyo has a tiny, tiny percentage of the market,

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and even Android 2.3, Gingerbread,

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has a very small percentage.

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If you eliminate support for these versions of Android,

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you can save yourself a lot of development and testing time.

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Also on this screen, you're asked which form factors,

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or what kind of devices you're going to support.

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The default is building an app for phone and tablet.

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And that's all I'm going to choose for my app.

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I'm not going to build apps for ware, TV, or Android Auto.

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So I'll set my minimum SDK to API 15,

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and click Next.

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By default, your app will have a single activity,

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or screen,

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and the default selection is a template named

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Blank Activity.

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This will create that Single Activity

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and it will display some simple text.

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It will also present a fairly sophisticated control

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called a Floating Action Button,

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and add Java code to react when the user presses the button.

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If you want to start with a much simpler app,

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choose the Empty Activity template

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and you'll only get a little bit of text.

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But I'll choose Blank Activity and click Next again.

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This screen asks for something called an Activity Name,

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and this will be the name of a Java class,

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and a related layout, which is an XML file

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that describes the appearance of this screen.

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There's also a title,

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and I'm going to change the Title to Hello World,

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and a Menu Resource Name,

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and this is an XML file that describes an Options menu.

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If you prefer, you can create your screen using a fragment,

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and this will let you easily adapt your application

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to tablets or other size devices.

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But I'll leave that option unchecked to keep things

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a little bit simpler,

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and I'll click Finish.

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That creates the project.

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When you see the Activity Design screen open and display

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the app's first screen,

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you're ready to run the app for the first time,

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but if this is the first time you've gone through this

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process, it might take awhile to get here.

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Down at the bottom of the screen,

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you'll see some messages indicating that content

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is being indexed,

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and this process can take a few minutes,

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so step away from the computer

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and then come back to it a little bit later.

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The next time you create a project,

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I promise it'll go a lot faster.

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Also, if you see any errors,

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once again wait for all that processing to finish

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before you try to fix it,

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but if you still see errors there,

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go to the menu and choose Build,

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and then Clean Project.

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And that will delete any artifacts that were initially

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created and completely rebuild the project

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and this will frequently fix any issues that appear

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the first time that you create the project.

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So now, you've created the app

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and you're ready to test it on a device.

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You'll need either a physical device that's configured

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for testing, or a virtual device that you can use

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in the Android emulator,

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and I'll describe how to get started with both options

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in the next couple of videos.

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-end-