2. Running an App

Your MobileUI cross-platform app project can be built and run from within Android Studio. The following sections explain, how to run an existing app-project on Android Emulator and iOS Simulator.

Running the App on the Android Emulator

• In Android Studio's launch section (at the top of the window) press the Play button and lean back.

  But wait - you don't have an Android device configured as shown above? Visit the Android Virtual Device Manager Documentation to create an AVD.

• After some number crunching, you should see a friendly screen like this on your emulator:

Hint: Is Android Studio asking you to increase your memory? Yes, please proceed!

Running the App on the iOS Simulator

Note: You can only build and run the app for iOS when you are working on macOS.

Manually add a RoboVM run configuration for iOS like this:

• Select Edit Configurations... from the launch section's drop down menu.

• Then click the + button in the top left and select RoboVM iOS from the popup menu.

• Rename the configuration in the Name text box to "app-ios".
• Select an simulator (e.g. iPhone® 11) in the Device Type drop down box.
• Then click OK.

• Proceed by pressing the Play button for the new configuration in the launch section.

• Are you building your very first app with MobileUI? Then go and get a quick coffee. Why?
  • The RoboVM compiler will compile a few thousand Java classes into machine code (RoboVM runtime, MobileUI Framework ...)
  • This step take several minutes. But keep calm: This only happens once!
• Coming back from kitchen, sipping a hot coffee, you might see your machine present this friendly screen to you: