Hello.
Actually, our device doesn't have a browser. so I used android webview for OAuth login.
Sometimes loading login page was failed. The blank page was displayed.
Do you have any ideas to solve this problem?
I/chromium: [INFO:CONSOLE(0)] "Refused to load the script '' because it violates the following Content Security Policy directive: "script-src 'unsafe-eval' https://www.dropbox.com/static/compiled/js/ https://www.dropbox.com/static/api/ https://www.dropbox.com/page_success/ https://cfl.dropboxstatic.com/static/compiled/js/ https://www.dropboxstatic.com/static/compiled/js/ https://cfl.dropboxstatic.com/static/js/ https://www.dropboxstatic.com/static/js/ https://cfl.dropboxstatic.com/static/previews/ https://www.dropboxstatic.com/static/previews/ https://cfl.dropboxstatic.com/static/api/ https://www.dropboxstatic.com/static/api/ https://cfl.dropboxstatic.com/static/cms/ https://www.dropboxstatic.com/static/cms/ https://www.google.com/recaptcha/ https://www.gstatic.com/recaptcha/ 'unsafe-inline' ".
Thanks
The Dropbox OAuth app authorization page should only be processed in the user's system browser. Using a web view is not officially supported, so I'm afraid I can't offer help with this.
That said, Android 4.4.2 itself is relatively old and I believe is itself no longer officially supported by Google, so you may want to look into upgrading to a newer version. Or, at least upgrading the version of Chromium used in your webview, if possible, as that may help with the issue.