问题
I'm using PhoneStateListener's onCallStateChanged method to track the states of an outgoing phone call. I need to get the state of the outgoing call when accepted. I was using CALL_STATE_OFFHOOK to determine the answering state, but it is called even when the call receiver ignores the incoming call. Is there any accurate and possible way to get the phone call answered state?
来源：https://stackoverflow.com/questions/9392804/how-to-get-a-state-that-the-outgoing-call-has-been-answered