IncompatibleClassChangeError exception is thrown when using JetS3t on Android

问题

I'm working on an Android application, which is going to upload some files to Google Cloud Storage. To do this, I'm using JetS3t java toolkit 0.9. I tried to use it on standard Java project and worked fine, but when I want to use it on Android project, I'm getting an exception.

I'm having the problem when instantiating a JetS3t Google Storage Service, like this:

GoogleStorageService gsService = new GoogleStorageService(gsCredentials);

The exception I'm getting when this line is executed is this one:

FATAL EXCEPTION: main
java.lang.IncompatibleClassChangeError: org.apache.http.params.SyncBasicHttpParams
    at org.jets3t.service.utils.RestUtils.createDefaultHttpParams(RestUtils.java:574)
    at org.jets3t.service.utils.RestUtils.initHttpConnection(RestUtils.java:298)
    at org.jets3t.service.impl.rest.httpclient.RestStorageService.initHttpConnection(RestStorageService.java:209)
    at org.jets3t.service.impl.rest.httpclient.RestStorageService.initializeDefaults(RestStorageService.java:166)
    at org.jets3t.service.StorageService.<init>(StorageService.java:125)
    at org.jets3t.service.impl.rest.httpclient.RestStorageService.<init>(RestStorageService.java:153)
    at org.jets3t.service.impl.rest.httpclient.GoogleStorageService.<init>(GoogleStorageService.java:125)
    at org.jets3t.service.impl.rest.httpclient.GoogleStorageService.<init>(GoogleStorageService.java:100)
    at org.jets3t.service.impl.rest.httpclient.GoogleStorageService.<init>(GoogleStorageService.java:78)

Looking at the exception thrown, the final error is exactly at this line:

HttpParams params = new SyncBasicHttpParams();

I've tried a bunch of things I saw on the Internet, like adding httpcore-4.1 and httpclient-4.1 jars to the classpath, but was useless.

Very grateful if someone help me! Thanks!

回答1:

Basically..don't use JetS3t on Android...here's what I found: https://groups.google.com/forum/#!topic/jets3t-users/vCq4pwXSPN8

来源：https://stackoverflow.com/questions/16799352/incompatibleclasschangeerror-exception-is-thrown-when-using-jets3t-on-android

标签

android

http

google-api

google-cloud-storage

jets3t