@OverridepublicvoidonCallStateChanged(intstate,StringincomingNumber){super.onCallStateChanged(state,incomingNumber);switch(state){caseTelephonyManager.CALL_STATE_RINGING:if(incomingNumber==null||"".equals(incomingNumber)){return;}break;}}我在Androidsdk27以下遇到过同样的问题，我在PhoneService中启动PhoneStateListen

来源:listener=newPhoneStateListener(){@OverridepublicvoidonCallStateChanged(intstate,StringincomingNumber){super.onCallStateChanged(state,incomingNumber);Toasttoast=Toast.makeText(getApplicationContext(),incomingNumber,Toast.LENGTH_LONG);toast.show();}};((TelephonyManager)getSystemService(TELEPHON