Kotlin app for Android phones to have a persistent app running even while the screen is locked and sending the device's location data, id and timestamp to your server.
I have no experience in App dev, so the code might be messy and illogical at times. Mostly reusing code scoured from the web and thanking the individuals accordingly in code comments.
Done for my thesis to demonstrate as a somewhat of an Android malware.
java/com.example.suspiciousapp/netSock contains netSock Kotlin object
java/com.example.suspiciousapp/snoopLocation contains snoopLocation.kt class and snoopLocationService.kt service
java/com.example.suspiciousapp/ contains in addition to above mentioned also the FirstFragment.kt and MainActivity.kt
Rest of the files are in their default locations.The gradle file is for the module, not the project.
Just run the app, give location permissions (the "always allow") and the app starts running. If you actually open the app you can get your current location by pushing the button and display the coordinates, though the app is already unbeknownst to the user acquiring the location coordinates every minute and sending them to the server which you can define in netSock.kt. The app is sticky and should be quite resilient to die.
The data can be received for example with netcat, for example "ncat -kl -p 9999 -o ncatout --recv-only" ncatout being the file to which the data will be written and remember to adjust the port accordingly in the app's netSock.kt script before deployment.
I also suggest defining a longer timeout for the TCP-socket in netSock.kt as the default is now 2 seconds, which might not be long enough in a situation where the user has poor network connectivity (client.setSoTimeout(2)).
Due to restrictions the background location (while the app isn't visible or the screen is locked) can only be obtained an few times in an hour. Also the app won't send the coordinates, if the location hasn't changed since the last location polling.