Hello,         i have build pisip 2.9 with android-ndk-r18b for arm-v8a & armeabi-v7a. after successfully building pjsip2.9 for this two ABI then i have open pjsua2 sample project in android studio. then make sip registration the sip registration and call is working file.  but some time app crash on hangup action. following code for  hangup. CallOpParam prm =new CallOpParam(); prm.setStatusCode(pjsip_status_code.PJSIP_SC_DECLINE); currentCall.hangup(prm); the currentCall is my call object. also i have attach log you can check for more understanding.