To use the emulator, you first must create one or more AVD configurations. In each configuration, you specify an Android platform to run in the emulator and the set of hardware options and emulator skin you want to use. Then, when you launch the emulator, you specify the AVD configuration that you want to load.
To specify the AVD you want to load when starting the emulator, you use the - avd argument, as shown in the previous section.
Each AVD functions as an independent device, with its own private storage for user data, SD card, and so on. When you launch the emulator with an AVD configuration, it automatically loads the user data and SD card data from the AVD directory. By default, the emulator stores the user data, SD card data, and cache in the AVD directory.
To create and manage AVDs you use the android tool, a command-line utility included in the SDK. For complete information about how to set up AVDs, see Android Virtual Devices.
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