Application Programming - General

Yes, as long as the Android application specifies the following in the Android Manifest file:

<uses-permission android:name="android.permission.INTERNET" />  

the application is allowed to make direct calls to the WebAPI.

Background:

If your applications receives the following error in the rsh 125 logs -

[stdout] [SDK_P_ACR__] App AuthListener timeout!!!!  [34xxxxx]

Reason:

Yes, you can use native code in your application and in the libraries that are utilized by your application.

Reference: http://developer.android.com/ndk/guides/concepts.htm

To determine if a device has Web Browser NX capabilities (SmartSDK), the recommended way is to determine the agent type.

If the value of user agent includes "ricoh_mfpapnl", the client browser must be a Web BrowserNX.

The SOP Servlet as a server uses the SSL certificate installed on the Smart Operation Panel (SOP).  The device certificate is not utilized on the SOP.

No, this should not be used.  

Below is snippet of information from the android documentation defining what the tag is used for:

No network operations should occur in the Main thread under G2.  Use AsyncTask.  See information below:

No. The Ricoh SmartSDK doesn't have the Android Notification API.