Programming an Android application to switch default SIM for mobile Data

I am working on a project in which I have to switch the default SIM for data automatically, and without the need for user intervention. I read some posts on internet and got to know a method in which we can switch off one of the sim and Data will automatically be switched to secondary sim. https://stackoverflow.com/questions/48696898/turning-off-second-sim-via-adb-shell-tasker-using-activities-intents This needs Android debug bridge. But, I am not able to find any function responsible for switching default data sim.