I have a few questions and points of clarification. Any help is
appreciated.

1) Does each thread have it's own message queue? Does each process
have it's own message queue? Or, is there simply 1 global system
message queue?

2) If there are in fact multiple message queues, when there is a
System event (e.g. intent being broadcasted) or UI event (key press),
into which message queue do these events inject entries?

3) If there is a single message queue for the OS and multiple APK's
installed and running, does only one Looper operate on the queue at a
time?

4) When/Why would you create a Looper for a child thread?

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