run npm install to install dependencies
Create a file with filename local.properties in android directory
Specify the path of the android sdk in local.properties
e.g,
sdk.dir = /home/<username>/Android/Sdk
Connect an android device with your system with android debugging switched on. Choose the android auto option when connecting with your system.
Use the command npm start to start the application and then press a to run on android.
It will automatically install and start on the device connected.