# QESDK Java callback interfaces Source: [https://docs.qualcomm.com/doc/80-PK177-134/topic/qesdk_java_callback_interfaces.html](https://docs.qualcomm.com/doc/80-PK177-134/topic/qesdk_java_callback_interfaces.html) - **[IQesdkEventCallBack](https://docs.qualcomm.com/doc/80-PK177-134/topic/java_iqesdk_event_callback.html)** Upon invocation of onEvent() by the QESDK framework to inform the application of service disconnects, the application may deinit() and init() again to re-acquire the service. **Parent Topic:** [QESDK Java API](https://docs.qualcomm.com/doc/80-PK177-134/topic/java_api.html) Last Published: Nov 14, 2024 [Previous Topic deinit](https://docs.qualcomm.com/bundle/publicresource/80-PK177-134/topics/individual_subsystem_deinit_java.md) [Next Topic IQesdkEventCallBack](https://docs.qualcomm.com/bundle/publicresource/80-PK177-134/topics/java_iqesdk_event_callback.md)