How to extract phone number from Call.Details in CallScreeningService?

Question

I'm making a call blocker for Android api 29. In order to do this, I have a class that extends CallScreeningService as explained here. My app can detect incoming and outgoing calls, but I don't know how to extract the phone number from Call.Details:

@RequiresApi(api = Build.VERSION_CODES.N)
public class CallScreenService extends CallScreeningService {

    @RequiresApi(api = Build.VERSION_CODES.Q)
    @Override
    public void onScreenCall(Call.Details callDetails) {
        CallResponse.Builder response = new CallResponse.Builder();
        Log.i("CallScreeningService", callDetails.toString());
    }
}

The log outputs "tel:**********" which I suspect means I don't have sufficient permissions to read the phone number. In Main I'm requesting permissions for all of the following:

   android.Manifest.permission.READ_CONTACTS,
   android.Manifest.permission.READ_PHONE_STATE,
   android.Manifest.permission.READ_CALL_LOG,
   android.Manifest.permission.PROCESS_OUTGOING_CALLS,
   android.Manifest.permission.ANSWER_PHONE_CALLS,
   Manifest.permission.CALL_PHONE

Additionally here is my Manifest for my CallScreening class:

    <service android:name=".phoneHandlers.CallScreenService"
        android:permission="android.permission.BIND_SCREENING_SERVICE">
        <intent-filter>
            <action android:name="android.telecom.CallScreeningService"/>
        </intent-filter>
    </service>

How can I read the phone number in Call.Details?

Answer 1

To get the current phone number already connected to the call you need to use Call.Details#getHandle().

So inside your onScreenCall :

@Override
public void onScreenCall(Call.Details callDetails) {
   Log.i("Phone number", callDetails.getHandle().toString());
}