Build, Install, and Run the Application in Your Emulator or Device

Having a project is nice and all, but it would be even better if we could build and run it, whether on the Android emulator or your Android device

Eclipse

With your project selected in the Package Explorer pane, click the green play button in the Eclipse toolbar to run your project. The first time you do this, you will have to go through a few steps to set up a run configuration, so Eclipse knows what you want to do.

1. First, in the Run As list, choose Android Application:
   
2. If you have more than one emulator A VD or device available, you will then get an option to choose which you wish to run the application on. Otherwise, if you do not have a device  plugged in, the emulator will start up with the A VD you created earlier. Then, Eclipse will  install the application on your device or emulator and start it up.

Notice there is an icon for your Now application. Click on it to open it and see your first activity in  action. To leave the application and return to the launcher, press the "BACK button", located to the right of the [MENU] button, and looks like an arrow pointing to the left.


Reference :

• Android Programming Tutorials, 3rd Edition

By Mohd Zulkamal
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