I'm working on a project that requires my app to be able to send DTMF tones on the voice's uplink frequency during an active call.
My 2 conditions are: - We don't use a customized Android platform - We don't need to root the phone I've spent several days doing my homework and am aware that in-call DTMF sending is not supported by the current SDK/standard APIs. However, by using the relevant classes in com.android.internal.telephony I am hoping to mimick how the native Phone app does this. I followed this site on how to use internal APIs for standard 3rd party apps: https://devmaze.wordpress.com/2011/01/18/using-com-android-internal-part-1-introduction/ I've also setup myself up with the Android OS dev environment and am able to run the Phone app in debug mode on an emulator to figure its inner workings. I tried various ways on a stock standard emulator but the errors I got were: 1) After trying to install a renamed app based on Phone.apk's source using the sharedUserId of android.uid.phone, I got: Installation error: INSTALL_FAILED_SHARED_USER_INCOMPATIBLE No doubt due to the fact I don't have the system cert to sign it. 2) After trying to write a custom app based on the relevant DTMF tone sending code from Phone.apk's source, I get the following error at setting up the PhoneFactory; java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.provider.Telephony.SPN_STRINGS_UPDATED. No doubt due to the fact my app doesn't have the right permissions - AndroidManifest.xml is setup with the same permissions as Phone.apk. I'm at a loss as to what else I could try. Does anyone have any suggestions? Thanks in advance, Simon. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
