1. Once the installation is complete, launch Android Studio.
2. Create a dummy project.
3. From the File menu, click Settings.
4. Under Appearance & Behavior,  expand System Settings and select Android SDK.
5. In the right pane, select SDK Platforms.

6. Select required packages to install and click Apply.

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   Google system images are required to create and start virtual devices (emulators). Generally, emulators created with Google APIs Intel x86 Atom System Image serve all the testing requirements, however, users can download and install any system image depending on the testing requirements.

   If you want Google Chrome in the Nougat emulator,  please select Google API as system image. Google Chrome comes as a default browser for Nougat and not for other Android operating systems. 

   System displays the list of components selected to be installed.

   1. Go to SDK Tools and ensure that Android SDK Build-Tools is installed. If not, then download it.
      

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   2. Click OK. 

   3. Once all the required components are installed, click Finish.
      Now you can start creating virtual devices.

Creating a Simulator

You need to download the required simulators if you want to execute test cases on simulators. 

To create a simulator:

1. Launch Xcode and navigate to Xcode > Preferences.
2. Select Components from the top. 
   All the available simulators are listed here.
3. Select one or more simulators from the list to download.
   A pop-up appears asking password.
4. Enter Password and then click Install Software.