OK, I've solved my problem by getting the context of the current top 
activity ( or at least the last one to get an *onResume()* ) and using that 
as my context (ctx).    Now, no matter what Activity is on the screen, when 
the command comes in from the PC to display graphics it launches right 
away, even as a standard launchMode Activity.

Thank you to everyone who offered suggestions or took time to read this 
thread.

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