The Android Emulator

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The emulator is the perfect tool for testing and debugging your applications.

The emulator is an implementation of the Dalvik virtual machine, making it as valid a platform for running Android applications as any Android phone. Because it's decoupled from any particular hardware, it's an excellent baseline to use for testing your applications.

Full network connectivity is provided along with the ability to tweak the Internet connection speed and latency while debugging your applications. You can also simulate placing and receiving voice calls and SMS messages.

The ADT plug-in integrates the emulator into Eclipse so that it's launched automatically within the selected AVD when you run or debug your projects. If you aren't using the plug-in or want to use the emulator outside of Eclipse, you can telnet into the emulator and control it from its console. (For more details on controlling the emulator, check the documentation at

To execute the emulator you first need to create a virtual device, as described in the previous section. The emulator will launch the virtual device and run a Dalvik instance within it.

At this time, the emulator doesn't implement all the mobile hardware features supported by Android. It does not implement the camera, vibration, LEDs, actual phone calls, the accelerometer, USB connections, audio capture, or battery charge level.

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