list build command

Author: Cody Brookshear

README.md

@@ -6,3 +6,12 @@ Ionic sample apps that use [Datalogic Cordova plugin](https://github.com/datalog
 ## Sample apps
 
 * [DecodeListener](DecodeListener/) - Sample Ionic app that uses `barcodeManager.addReadListener` to display barcode data on the screen.
+
+## Build
+
+First, make sure you are set up to build and run on an Android device. See the [requirements here](https://ionicframework.com/docs/intro/deploying/). You can build and run any of the Ionic app samples with a single command:
+
+```bash
+ionic cordova run android --device
+```
+