(If you are on Mac, please read this:)
Genymotion is one of the fastest Android emulators, and we use it a lot when we prototype with GeneXus. Sometimes we need to run our applications remotely, for performance issues, virtualization issues, etc. Here its a tip to do this with Genymotion. For example, if you use GeneXus on a virtual machine, you could run your application on a Genymotion running on your PC.
Follow this steps:
On the Genymotion machine:
Windows
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If you don't have a virtual device on Genymotion create one. For example, I created a Nexus 4 emulator: 
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On VirtualBox set the second net adapter of the device as Bridged Adapter:
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Turn on the device in the Genymotion console, and get the ip address:
Mac
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Descargar e instalar Genymotion. Asegurarse de instalar también las Genymotion Shell que viene con el instalador:genymotion
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Descargar un emulador de Android en Genymotion (el que uno quiera)
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Antes de iniciar el emulador, en Genymotion ir a Settings/ADB.
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Luego seleccionar la opción “Use custom Android SDK tools” y dejar el campo “Android SDK” vacío (aunque deje el campo en rojo y de un warning)
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Iniciar el emulador. Saldrá un mensaje similar al siguiente: “ADB tool not found at the specified Android SDK location. Do you want to specify the Android SDK location?” y seleccionan la opción “NO”.
- Iniciar la aplicación Genymotion Shell y escribir el siguiente comando “devices list”. Se mostrará una grilla con los dispositivos instalados en Genymotion y si están activos o no. Para el emulador activo en cuestión, copiar el IP del mismo.
On GeneXus machine:
- Open a Command prompt windows
- Execute this line:
<Android SDK dir>\platform-tools\adb.exe connect <IP Address>
Where <Android SDK dir> is where you have installed your Android SDK, and <IP Address> is the one you copied on the step 3.
If everything went ok, you should see something like this:
3. Run the application from the IDE and that´s all!