FAQ-1040 Can I access a CEikonEnv handle from JNI code?


FAQ-1040 Can I access a CEikonEnv handle from JNI code?

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Classification:	Java	Category:	JNI
Created:	04/27/2004	Modified:	06/16/2004
Number:	FAQ-1040
Platform:	Symbian OS v6.0, Symbian OS v7.0

Question:
To access the User Interface, make use of Dynamic Navigation Links or take advantage of the view architecture from within JNI code, I need a valid CEikonEnv handle. Can I access such a thing from JNI code?

Answer:
This is unfortunately not possible.

Every Symbian OS application (including PersonalJava apps) has a CEikonEnv handle associated with its main (User Interface) thread which allows user code to interact with the UI. This handle is thread-specific and cannot be shared with other threads. The AWT-Server is furthermore distinct both from the main Java thread and from the AWT event handler thread. So there is no way to access the CEikonEnv from JNI code.