Java – Android – weird escapeutil.unescapestring crashes

We encountered a crash when receiving JSON strings from our application server. We think that additional escape will be added when the entry has "quotation marks"

In Android, how do I determine whether I receive such a string and how to repair it from the Android side?

This is our current response string processing:

public String processResponseString(String responseString) {
    if (responseString.startsWith("\"")) {
        responseString = responseString.substring(1,responseString.length());
    }
    if (responseString.endsWith("\"")) {
        responseString = responseString.substring(0,responseString.length() - 1);
    }
    responseString = EscapeUtil.unescapestring(responseString);
    return responseString;
}

In addition, after the crash, logcat does not contain the entire JSON string, so I can't see the actual string that caused the crash

exception

 java.lang.ClassCastException: com.optiisolutions.housekeeping.model.OptiiAPI.OptiiError cannot be cast to java.util.Map
 at com.optiisolutions.housekeeping.network.OptiiHTTPClientRetroFit$2.success(OptiiHTTPClientRetroFit.java:186)
 at retrofit.CallbackRunnable$1.run(CallbackRunnable.java:45)

OptiiHTTPClientRetroFit.java:186

optiiClient.postRequest(event.getRequest(),new Callback