MTJ allows you to add mobile SDKs to Eclipse. The mobile SDKs can contain one or several device platforms which you can define as the mobile runtimes used to develop MTJ applications for target mobile devices. After you have added the mobile SDK to MTJ, you must configure it in MTJ preferences. Every time you create an MTJ project, you are asked to define the mobile runtime for that project. The available mobile runtimes include emulators and actual phone runtimes. The selection of available mobile runtimes depends on the chosen SDK.
With MTJ you can choose which device platforms are imported from the SDK in order to make them available for use in MTJ projects as the desired mobile runtime. You can define the device platforms in MTJ preferences.
Note: MTJ project can have only one active device platform at a time.