In order to use android emulator in your computer download and install android sdk and download the packages required. Download sdk from the link
Start the emulator from the android virtual device manager.
In windows change your directory to sdk/platform-tools and open the command prompt. Type adb devices to view the emulator attached. For example let us consider the apk to be installed as abc.apk and it should be in the path /sdk/platform-tools/abc.apk
Enter the command adb install abc.apk to install the apk in the emulator.
In Ubuntu start the terminal by pressing Ctrl+Alt+T keys. In Ubuntu install adb and enter the command adb install abc.apk . Your Android application will be now installed in the emulator.Enjoy
The above is a screen shot of Android emulator running in Ubuntu linux 13.04……