问题
I want to record calls only (But only my voice or the person who has my app installed) but VOICE_UPLINK is not working , but MediaRecorder.AudioSource.MIC is working and recording audio of both caller and recipient
I've tried :-
sources as :- MIC , VOICE_CALL , DEFAULT , VOICE_COMMUNICATION , CAMCORDER , UPLINK , DOWNLINK
but Uplink and Downlink is not working
When I use Uplink or downlink my app misbehave while When I use other sources my app works fine
回答1:
It is due to permission
user-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT" >
Which is only granted to system apps , as VOICE_UPLINK and VOICE_DOWNLINK requires this permission 3rd party applications are not granted this permission
It also depend on manufacturer , which can restrict users from recording calls. It maybe done by hardware or software.
These are the two possible reasons I think why This ain't working
来源：https://stackoverflow.com/questions/56733296/how-to-record-calls-using-mediarecorder-audiosource-voice-uplink