Use Intel XDK to export to Android or iOS
Intel XDK is a software is a HTML5 development platform that come with a service allowing to build Android or iOS application from a HTML5 appplication. Using GDevelop, an option is available, when you export a game created with the HTML5 platform, to export your game in a project that can be opened with Intel XDK and then compiled for Android or iOS.
Export the game
First, open your game in GDevelop and choose File > Export to the web in the ribbon. Choose then Export to iOS or Android with Cordova (Intel XDK) and click on Export.
When exportation is finished, a window tells you where the game is available:
Open it with Intel XDK
Download and install Intel XDK if you do not have it. It's free and available on http://xdk-software.intel.com/. After the installation, launch it. You need to create an account at the first start and then the homepage is displayed:
On the Intel XDK homepage, choose Start a new project:
And then select Import Your HTML5 Code Base:
Select the folder where GDevelop exported your game (it's shown in the window opened when the export is done). This is the folder containing a file named config.xml and a directory called www.
Click on Continue. A window will ask you for a name (so enter your game name) and another window will ask for a few details: you can click on Continue without changing anything.
Your project is now created in Intel XDK! By default, Intel XDK open the Develop tab containing the code of your game. Instead, click on Projects (in the top-left) to show all your Intel XDK projects and to edit the settings of the project. The build tab can then be used to export your game.
Edit project settings in Intel XDK
Now that you have your project created in Intel XDK, you can edit some settings, in particular the App Version, the App Name and the orientation (landscape or portrait). To do it, click on Projects (in the top-left), then choose your project and on the right open Build Settings:
Remember to also set the app id to something like
com.yourname.yourgamename (app id are written in a reverse URL style).
It's also a good idea to have custom icons for your game, but you can skip this step if you just want to do some tests.
Finally, if needed you can activate third-party plugins: this is usual not needed, except if you want to display ads using the AdMob Object: see this tutorial about adding ads to your game.
Package your game
Go in the Build tab to generate your game:
For Android, choose Crosswalk for Android.
Click on Build and your project is uploaded to the Intel XDK servers.
Click on the big Build App Now button. Your game is being built on Intel XDK servers. When it's done, you'll receive an email and a confirmation window will show you links to the APK that you can send to your devices or submit to Google Play Store.