How to create an app

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Lluís Enric Mayans
@lluisenricmayans
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Preliminary information

Prima di enter the live tutorial, walking to spiegare how to create an app, there is some preliminary information about it that it is my duty to provide you.

First of all, keep in mind that to develop applications you need to know the related ones programming languages, or at least have a smattering of it. Those currently most popular on Android are Java e XML, while for iOS / iPadOS they are Swift (launched by Apple in 2014) and Objective-C (historical language on which the apps for iPhone and iPad were based from the beginning).



elaborate on e to study the various programming languages, you can check out my specific tutorials on how to start programming, how to create a program, how to learn Java and how to program in Java. Further detailed tutorials on the subject can also be found by doing some research on Google, on forums and specialized Internet sites on the subject, as in the case of HTML.com which includes a section full of special guides. You may also find the books and eBooks on the subject on Amazon useful, such as those listed below.

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Once learned, programming languages ​​can be used through software specific for the development of applications, which can be divided into two different categories: the SDK and independent commercial solutions.

The SDK (acronym for Software Development Kit) are the tools made available by the same companies that manage the operating systems (Google, as for Android, and Apple, as regards iOS / iPadOS), through which it is possible to make the most of the platform to which they are addressed and also allow you to manage everything in detail, optimizing each function and carrying out various tests.



Independent software, on the other hand, is made available by third-party companies and allows you to develop content within an integrated environment. They are easier to use than SDKs and, depending on the license you have, allow you to work on a single project that can be exported to different formats, thus ensuring compatibility with various platforms.

How to create an Android app

Having made the necessary clarifications above, let's get to the point and let's find out, first of all, how to create an android app. To do this, you can rely on the use of Android Studio, the tool provided by Google itself to develop applications for its mobile platform. It's free and works on Windows, macOS, Linux, and ChromeOS.

To download it, go to the program's website and click on the button Download Android Studio placed in the center of the page. Then check the box next to the item I have read and agree with the above terms and conditions located in the form that opens and click on blue button located at the bottom.

When the download is complete, if you are using Windows, april il .exe file obtained and, in the window that is shown to you on the desktop, click on the buttons Yes, Next (three times in a row), install and again Next, then press the button Finish, in order to complete the installation.

Stai using MacOSInstead, open the package .dmg got it, move theandroid studio icon in the folder Applications on your Mac, right-click on it and select the item apri for two consecutive times, in order to start the program going to circumvent the limitations imposed by Apple on applications from non-certified developers (operation that must be carried out only at the first execution).



Now that you see the program window on the screen, click on the buttons OK e Next (three consecutive times), press the button Finish and wait for the download of the components necessary for the operation of Android Studio to start and complete.

At this point, select the option Start a new Android Studio project, in order to start creating a new project. Next, choose the module from which you intend to start, assign a name to the application you are going to develop and select the version of the SDK to be used; then click on the button Next and indicates which of the preset bases available you want to exploit. Finally, configure the values of the project or leave the default ones and click the button Finish.

After completing the steps described above, you will find yourself in front of theeditor of the program, which is composed as follows: on the left there is the structure with all the elements of the project, on the right the area in which to enter the code parts, while at the top there are the menu bars and buttons for inserting objects , paste the code portions and so on.

When you are done working on your application, you can save the project by clicking on the menu Fillet at the top left and selecting the appropriate item from the latter.

For more details and insights on the operation of Android Studio, I suggest you consult the guide to the use of the software provided directly by Google.


How to create an iOS app

Be, invent, you interest capire how to create an iOS app (o iPadOS), I inform you that the most suitable tool for the purpose is Xcode. It is, in fact, the solution made officially available by Apple for the development of apps for iPhone and iPad and integrates an emulator through which it is possible to test the operation of applications and Internet sites, so that you can view everything just like from iOS and iPadOS. It's free and can only be used on macOS.


To download and install Xcode on your computer, go to the relevant section of the Mac App Store, click the button Get, quindi quello Install and then authorizes the download using password dell'ID Apple o touch ID (if the Mac you are using supports the above technology).

Now, start the program by clicking on the button apri appeared in the window of the Mac App Store oppure selecting the relative icon which has just been added to Launchpad and, in the welcome screen of the program that in the meantime has appeared on the desktop, click on the button Agree.

Successively type the administration password of the Mac and wait for thecomponent installation required for Xcode to work. Afterward, choose the option Create a new Xcode projectselect il template you want to use for your app among those available and indicate the name you intend to assign to the project.

Once this is done, you can finally begin to concentrate on the development of the application, using theeditor of Xcode, which is divided into the following sections: on the left there is the project structure, in the center the section for inserting the code parts, on the right the viewer, while at the top and at the bottom there are buttons and menus with useful functions and commands.

After successfully creating an app, save all by clicking on the menu Fillet at the top left and then selecting the appropriate item.

For further details and insights on the functioning of the program, I suggest you consult the web page dedicated to solutions for Xcode that you can find on the Apple website.

How will I create a gioco app

Your goal wasn't to create an app but a game? If so, I suggest you turn to Unity. It is a development environment dedicated to the creation of numerous 3D and 2D simulations, which it is usually used for create a game app.

It is compatible with Windows and macOS and is free, as long as the legal entity representing those who use it does not generate earnings or fundraisers exceeding $ 100.000, otherwise you must use one of the paid versions (with prices starting at $ 40 / month).

To download the program to your computer, go to its website and click on the button Get Started. On the new page that appears, select the tab Individual and press pulsating Get Started placed in correspondence with the item Personnel. Next, click on the buttons Start here e Agree and download.

Download completed if you are using Windows, april il .exe file obtained and, in the window that appears on the screen, click on the buttons Yes e Next. Then check the box I accept the terms of the License Agreement, award your bottone Next (three consecutive times) and complete the setup by clicking on the button install.

Stai using MacOS, april il package .dmg obtained and move theUnity icon in the folder Applications on the Mac, then right-click on it, select the item apri that you find in the context menu and press the button apri in the window that opens on the desktop, in order to circumvent the limitations imposed by Apple on applications from non-certified developers (operation to be performed only at the first run).

Now that, regardless of the OS you're using, you see the program window on the screen, choose whether to record a Unity account or whether to skip this step, then type the name you want to assign to the project, choose a template from the list below and click on the button Create project.

Therefore, use theeditor of the program to start developing your game: on the left there is the panel to manage the elements on the scene, on the right you find the one that allows you to view and modify the properties of what is selected, at the bottom there is the area to manage the solutions that make up the project and the viewer is at the center.

When you have finished creating your game, you can export the final result by clicking on the menu Fillet located at the top left, by selecting the item Build Settings from it, then that relating to platform of your interestby clicking on the buttons Switch Platform e Build, assigning a name to the final file and saving it in one position as you like on your computer.

I point out that not always on the computer there are all necessary components to develop games. So, if you do not have libraries, modules and ad hoc software at your disposal, you can proceed with the download in advance by accessing the menu Fillet of Unity, selecting the option Build Settings attached to it, indicating the platform name and premendo sul bottone Open Download Page.

For further details and insights on the functioning of Unity, I invite you to refer to the official user manual that you can find on the program's website.

How to create an app without knowing how to program for free

If you are wondering if there is any system for create an app without knowing how to program for free, I inform you that the answer is affirmative. To do this, you can take advantage of AppsBuilder: an online service that allows you to develop native applications for Android, iPhone / iPad and other devices and platforms automatically, starting from any website or online content, which is why it is also an excellent solution for create a site app. Basically it is totally free, but to expand the features offered you need to subscribe to a paid plan (with prices starting from € 19 / month).

To use AppsBuilder, go to its website, click on the button Try for free placed in the center and then on the button Continue. Then proceed to create your own account on the site, by filling in the appropriate fields with the required data (email and password). Alternatively, you can log in with your Facebook account by clicking on button and logging in with your data.

Once logged in, follow the guided procedure that is proposed to you to start creating your application, indicating the relative one membership category and name. Once this is done, you will find yourself in front of theeditor of the service. Then translate the user interface into cityno, by selecting the language from the drop-down menu at the top right.

Then select the card My featuresclick on your bottone Add functionality and add the functions of your interest to the app, select the relative ones icon and making all the necessary customizations through the proposed menus. In the section Style and navigation of the editor, on the other hand, you will find the functions to intervene on the aesthetic aspect of the application.

Whenever you make changes to the app, remember to save them by clicking on the button Save which is located at the top. To exit the editor and save the changes at the end, instead, press the button Edit completed.

For further details and insights on the functioning of AppsBuilder, you can consult the appropriate guides on the website of the service.

How to create an app: cost

After explaining how to create an app, it seems only right to point out the cost that you must eventually support to publish the latter on the store of the mobile platform of your interest, as well as how you in turn earn money with the work you have done. To find out more, continue reading, you will find everything explained below, in relation to Android e iOS / iPadOS.

Android

For Android, the publication of the app officially takes place on the Play Store, the application store for the “green robot” mobile platform. To do this, you need to create a developer account and associate a Google account.

The operation in question costs 25 $ and it is quite simple to do: just visit the appropriate page of Google Play Console and upload the APK file application, manage its metadata (i.e. version and system requirements) and think about the commercial part (title, description, etc.).

As for the possibility of earn through the apps published on the Play Store, the solutions are different: you can choose to make the apps available paid or free but with advertisements inside or, again, for free or for a fee, proposing however in-app purchases to offer additional content.

For more information on the use and operation of Play Console, I suggest you read the relevant official guide.

iOS / iPadOS

Even if you've taken steps to create an app for iOS / iPadOS, to publish it onApp Store, that is the digital store of applications for Apple's mobile platform, you must have a developer account.

In order to get it, you have to pay 99 $ per year and the request must be made through the specific web page of the Apple Developer Program site, by clicking on the button Start Your Enrollment located at the bottom of the page.

Next, to proceed with publishing the app you need to use Xcode, the program I told you about in the step on how to create an app for iOS / iPadOS, and theApp Store Connect, that is Apple's web platform that allows you to enter all the information about the application which will then go to the App Store.

Regarding the possibility of earning with the apps published on the App Store, the solutions that can be considered are different: it is possible to make the applications available paid or for free but with advertisements. There is also the opportunity to publish the apps for free or for a fee by proposing however in-app purchases to allow access to extra content.

For more information on the Apple Developer Program, I refer you to the consultation of its website.

How to create an app

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