Error: Unexpected string in JSON at position 776

I have created an app using ionic 1. I am running my using web browser with following command as mentioned on Ionic get started page ‘ionic serve’.The app is loading on web as expected but when I am using the same with ‘ionic run android’ as mentioned on get started page it is not running on real device.I don’t know why? the error is coming on command prompt as shown below

Error: Unexpected string in JSON at position 776

@abdulwaheedandroid Are you connecting to Json???

Did you JSONlint your object? Maybe there’s some weird ’ to " mismatch that throws the device browser off