. lang。ClassNotFoundException:没有找到类“android.support.v4.content”。文件提供者“Adone AIR本机扩展错误”。

maybe my question sounds like asked 100 times before, but believe me I have read every answer for those 100 similar questions and non of them solved my problem. So purpose of my native extension is to share documents in my app cache folder (doc, pdf, etc.) with third party apps (Quick Office, Adobe Reader etc). I found that FileProvider and Intents should solve my problem.maybe my question sounds like asked 100 times b