I am trying to obtain data from a popup window of the USSD protocol, since my application, I can call the code in this almost * 144 # without any problem, but nevertheless, I have dealt with imnumerable codes found on the internet without obtaining any results positive.
The last one I tried to use was this link
but with my inexperience, I can not get fruitful results ... try to download the application that appears there, and apparently when running it, even when it seems to execute what I want, a blank screen appears that does not allow me to do anything ...
also the simple code does not help me because I could not recreate it in a new project ... trying to replace the fragment method with a normal main activity