Marco Estrella

Installing Android Studio 3.1.2

If you are completely new on Android and want to take your first step, this will be a good article for you. Here, I’m going to teach you how to install and configure Android Studio and how to create a project to run it on a emulator. The steps to follow are:

Let’s start.

Installing Java 10

Note: If you already have installed Java 7, 8 or 9, you can skip this step.

First of all we are going to download and install Java 10. Why?, It´s because Java is the choosen language by google to coding android apps. For that reason, We have to download the JDK. What is the JDK?, It´s a bundle of tools to code with the java language, Among them we have the JVM(Java Virtual Machine), Java Standard Libraries which we could use and more tools.

Let’s go to the Oracle Official web page to download the JDK(Java Development Kit).

This section of the page is important for us.

Sección para descargar el JDK

Firstly, we have to accept the license clicking on Accept License Agreement.

Aceptar la licencia

We can download JDK now :). Choose the correct jdk according your operating system. In this case, I’ll choose for Windows x64.

Descargar el JDK de acuerdo a tu Sistema operativo

Once you have downloaded the *.exe file. Just execute it and clicking on the Next buttons until arrive to this screen.

Java fue Instalado

Configuring Java 10

In this step, we’re going to add a environment variable named JAVA_HOME on our operating system and as its value will be the address ofthe folder where we installed java before.

¿Why should we configure JAVA_HOME?

If we don’t configure JAVA_HOME, we won´t be able to use the tools which java provides us on our operating system. Java has a bundle of tools which we could use them as a command on the command line. Android Studio needs those tools to run some features. Those tools are on C:\Program Files\Java\jdk-10.0.1\bin.

If we haven’t already configured it, our operating system won’t recognize the command to see the version of installed java: java -version.

Windows no reconoce el comando Java

We should follow those steps to configure an environment variable:

Right click on This PC. Then, click on Properties.

Left click on Advanced system settings.

We’ll see the screen System Properties and click on Environment Variable:

Once you are in the screen of Environment Variable, click on New:

We’ll see a small screen where we’ll add the information of JAVA_HOME: On Variable name we are going to set JAVA_HOME and on Variable value we are going to set the address of the folder where you installed java.

Go to C: -> Program Files y Java. You’ll see two folders, choose jdk-10.0.1.

Finally, We’ll have this result and click on OK.

You need to change the Path variable now. To do that, you should select it and click on Edit….

Go to the end of the value and add ;%JAVA_HOME%\bin.

Finally, we are going to test the command java -version which windows did not recognized at the beginning.

Windows is recognizing the command now.

Installing Android Studio 3.1.2

Now that we have installed JDK on our computer, we already could install Android Studio without troubles. To do that, go to the Offical page and you will see that button Download android studio.

Click it, and you will see the license, check it and download it.

Now that you have the *.exe on your computer, run it and click on the next buttons until arrive to the screen with the install button, then wait and go for a coffee.

Finally…

End of the installation

If this is the first time you install android studio, choose the last option and click ok, because you don’t have old settings to import on this new android studio.

Now we can see the screen to configure the Android SDK in Android Studio.

Note: Android Studio is just an editor and for compiling, executing, debbuging and test our apps we need the Android SDK, this contents many tools for android development.

Select the configuration type. I recommend to keep selecting the Standard option.

Now, select the Android Studio’s UI Theme, choose the one you like. I selected Darcula in my case :D.

In this screen we are going to configure the Android SDK Path, if we already have one installed the wizard will detect it automatically, but if It’s a new install we could indicate the folter where we want android sdk to install.

Click on Finish to download, install and configure the selected options before.

We already have installed the necessary components for android studio to work properly.

We already have Android Studio ready to create our first project.

Creating an android project

To create a new Android Project, click on Start a new Android Studio Project.

Set the Application Name, Company Domain and change the auto generated package name if you want. To do that, click on Edit. Click on Next to continue.

Choose which devices you want to run your app, choose the first one for our first app. Click on Help me choose to select the android version, choose 6.0 Marshmelow for the moment. Click on OK and click on Next to continue.

Cuando creamos un proyecto android, este ya viene con una pantalla por defecto. Por ahora solo escogeremos que la pantalla esté vacía; Clickamos en Empty Activity y vamos a siguiente paso clickando en el botón Next.

Regresando a la imagen. Existen 2 campos importantes, el Activity Name es para darle nombre al archivo *.java y el campo Layout Name es para darle nombre al archivo *.xml. Podemos dejarlo con los nombres por defecto si deseamos y clickamos en Finish.

We are going to name the default screen on our project. And activity is the representation of a screen on android. This activity is divided on two parts. The first one is an xml file where we’ll design our screen(buttons, text boxes, etc). And the second one is a java file where we’ll code the behavior of the view components designed on the xml file.

On the Activity Name field we’ll put the name for the java file and on the Layout Name field we’ll put the name for the xml file. Click on Finish to create the project.

We already have our first android project created.

Creating an Android Emulator

We are going to create an android emulator to run our app on this but What is an android emulator?, This simulates a real device on our computer, we can install and uninstall apps on this.

First, click on AVD Manager.

AVD means Android Virtual Device, for more information have a look the the official page.

Click on Create Virtual Device.

Choose an Smarthphone’s model and click on Next. On my case, I’ll choose the Galaxy Nexus.

Choose the android version for you emulator. We just have Nougat - V7.0 downloaded for the moment. select it and click on Next.

In this last step, we could add and remove features for our emulator but we dont do that for the moment. Just click on finish.

We could see our emulator on a list, click on Play to run it.

Wait for a moment and you will see an Smarthphone running on your computer :).

Running of our project on the emulator

Now that we have our app created and our emulator running, we will run the project on the emulator clicking on the button Run.

Since we already have an emulator running well, we will see the name of this emulator on the list of connected devices, choose it and click OK.

Wait a moment and our first app will be displayed in the emulator.

I hope this article has been helpful.

Thanks for the visit.