Running Your App

Run on a Real Device

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If you have a real Android-powered device, here's how you can install and run your app:

1. Plug in your device to your development machine with a USB cable. If you're developing on Windows, you might need to install the appropriate USB driver for your device. For help installing drivers, see the OEM USB Drivers document.
2. Enable USB debugging on your device.
   • On most devices running Android 3.2 or older, you can find the option under Settings > Applications > Development.
   • On Android 4.0 and newer, it's in Settings > Developer options.
     Note: On Android 4.2 and newer, Developer options is hidden by default. To make it available, go toSettings > About phone and tap Build number seven times. Return to the previous screen to findDeveloper options.

To run the app from Eclipse:

1. Open one of your project's files and click Run  from the toolbar.
2. In the Run as window that appears, select Android Application and click OK.    

   Run on the Emulator

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   Whether you're using Eclipse or the command line, to run your app on the emulator you need to first create anAndroid Virtual Device (AVD). An AVD is a device configuration for the Android emulator that allows you to model different devices.
   

   Figure 1. The AVD Manager showing a few virtual devices.
   To create an AVD:
   1. Launch the Android Virtual Device Manager:
      1. In Eclipse, click Android Virtual Device Manager from the toolbar.
      2. From the command line, change directories to<sdk>/tools/ and execute:

         android avd

   2. In the Android Virtual Device Manager panel, click New.
   3. Fill in the details for the AVD. Give it a name, a platform target, an SD card size, and a skin (HVGA is default).
   4. Click Create AVD.
   5. Select the new AVD from the Android Virtual Device Manager and click Start.
   6. After the emulator boots up, unlock the emulator screen.
   To run the app from Eclipse:
   1. Open one of your project's files and click Run  from the toolbar.
   2. In the Run as window that appears, select Android Application and click OK.