Customers have a demand, first to the transponder automatically dial the telephone, mobile phone dial on the dial complete identity authentication, then use NFC read magnetic card information, and then sent to the transponder,
The problem now is my app read magnetic card information, send directly to the app. Want to read through the system phone program (don't customer manual input on the dial) sends out, it involves my phone app to operating system program, I checked some information, to use DTMF, but need to sign with system use DTMF, need platform of mobile phone manufacturers. Pk8 and platform x509. Pem file, with android for these two files also not line,
I tried to use the android platform in the source code. Pk8 and platform x509. Pem, really not line, the generated apk phone not to install, don't know is my steps have problem, still must want to mobile phone manufacturers,
My question is: 1. This requirement is must use DTMF, if not, what is the solution can,
2. If must use DTMF, need the signature file platform. Pk8 and platform x509. Whether the pem must provide mobile phone manufacturers, can in the source code?