configData is always empty, should hash before reading it.

[Copy33]

In the Configuration class of your test app, configData becomes empty after reading it, which means hashing it on the line mConfigHash = configData.sha256().base64(); always returns the same hash, should be placed before mConfigJson = new JSONObject(configData.readString(Charset.forName("UTF-8")));

[HappyDr0id]

👍 Totally right. I did not get any exception while running the demo app, but once I integrated the implementation in my app, I got a NullPointerException because of this. Moving the hashing line as described by @Copy33 fixes the issue.