[Samsung Galaxy Gear] fOmey:
shell@android:/ $ am
am
usage: am [subcommand] [options]
usage: am start [-D] [-W] [-P <FILE>] [--start-profiler <FILE>]
[--R COUNT] [-S] [--opengl-trace]
[--user <USER_ID> | current] <INTENT>
am startservice [--user <USER_ID> | current] <INTENT>
am force-stop [--user <USER_ID> | all | current] <PACKAGE>
am kill [--user <USER_ID> | all | current] <PACKAGE>
am kill-all
am broadcast [--user <USER_ID> | all | current] <INTENT>
am instrument [-r] [-e <NAME> <VALUE>] [-p <FILE>] [-w]
[--user <USER_ID> | current]
[--no-window-animation] <COMPONENT>
am profile start [--user <USER_ID> current] <PROCESS> <FILE>
am profile stop [--user <USER_ID> current] [<PROCESS>]
am dumpheap [--user <USER_ID> current] [-n] <PROCESS> <FILE>
am set-debug-app [-w] [--persistent] <PACKAGE>
am clear-debug-app
am monitor [--gdb <port>]
am screen-compat [on|off] <PACKAGE>
am display-size [reset|WxH]
am display-density [reset|DENSITY]
am to-uri [INTENT]
am to-intent-uri [INTENT]
am switch-user <USER_ID>
am stop-user <USER_ID>

am start: start an Activity. Options are:
-D: enable debugging
-W: wait for launch to complete
--start-profiler <FILE>: start profiler and send results to <FILE>
-P <FILE>: like above, but profiling stops when app goes idle
-R: repeat the activity launch <COUNT> times. Prior to each repeat,
the top activity will be finished.
-S: force stop the target app before starting the activity
--opengl-trace: enable tracing of OpenGL functions
--user <USER_ID> | current: Specify which user to run as; if not
specified then run as the current user.

am startservice: start a Service. Options are:
--user <USER_ID> | current: Specify which user to run as; if not
specified then run as the current user.

am force-stop: force stop everything associated with <PACKAGE>.
--user <USER_ID> | all | current: Specify user to force stop;
all users if not specified.

am kill: Kill all processes associated with <PACKAGE>. Only kills.
processes that are safe to kill -- that is, will not impact the user
experience.
--user <USER_ID> | all | current: Specify user whose processes to kill;
all users if not specified.

am kill-all: Kill all background processes.

am broadcast: send a broadcast Intent. Options are:
--user <USER_ID> | all | current: Specify which user to send to; if not
specified then send to all users.

am instrument: start an Instrumentation. Typically this target <COMPONENT>
is the form <TEST_PACKAGE>/<RUNNER_CLASS>. Options are:
-r: print raw results (otherwise decode REPORT_KEY_STREAMRESULT). Use with
[-e perf true] to generate raw output for performance measurements.
-e <NAME> <VALUE>: set argument <NAME> to <VALUE>. For test runners a
common form is [-e <testrunner_flag> <value>[,<value>...]].
-p <FILE>: write profiling data to <FILE>
-w: wait for instrumentation to finish before returning. Required for
test runners.
--user <USER_ID> | current: Specify user instrumentation runs in;
current user if not specified.
--no-window-animation: turn off window animations will running.

am profile: start and stop profiler on a process. The given <PROCESS> argument
may be either a process name or pid. Options are:
--user <USER_ID> | current: When supplying a process name,
specify user of process to profile; uses current user if not specified.

am dumpheap: dump the heap of a process. The given <PROCESS> argument may
be either a process name or pid. Options are:
-n: dump native heap instead of managed heap
--user <USER_ID> | current: When supplying a process name,
specify user of process to dump; uses current user if not specified.

am set-debug-app: set application <PACKAGE> to debug. Options are:
-w: wait for debugger when application starts
--persistent: retain this value

am clear-debug-app: clear the previously set-debug-app.

am bug-report: request bug report generation; will launch UI
when done to select where it should be delivered.
am monitor: start monitoring for crashes or ANRs.
--gdb: start gdbserv on the given port at crash/ANR

am screen-compat: control screen compatibility mode of <PACKAGE>.

am display-size: override display size.

am display-density: override display density.

am to-uri: print the given Intent specification as a URI.

am to-intent-uri: print the given Intent specification as an intent: URI.

am switch-user: switch to put USER_ID in the foreground, starting
execution of that user if it is currently stopped.

am stop-user: stop execution of USER_ID, not allowing it to run any
code until a later explicit switch to it.

<INTENT> specifications include these flags and arguments:
[-a <ACTION>] [-d <DATA_URI>] [-t <MIME_TYPE>]
[-c <CATEGORY> [-c <CATEGORY>] ...]
[-e|--es <EXTRA_KEY> <EXTRA_STRING_VALUE> ...]
[--esn <EXTRA_KEY> ...]
[--ez <EXTRA_KEY> <EXTRA_BOOLEAN_VALUE> ...]
[--ei <EXTRA_KEY> <EXTRA_INT_VALUE> ...]
[--el <EXTRA_KEY> <EXTRA_LONG_VALUE> ...]
[--ef <EXTRA_KEY> <EXTRA_FLOAT_VALUE> ...]
[--eu <EXTRA_KEY> <EXTRA_URI_VALUE> ...]
[--ecn <EXTRA_KEY> <EXTRA_COMPONENT_NAME_VALUE>]
[--eia <EXTRA_KEY> <EXTRA_INT_VALUE>[,<EXTRA_INT_VALUE...]]
[--ela <EXTRA_KEY> <EXTRA_LONG_VALUE>[,<EXTRA_LONG_VALUE...]]
[--efa <EXTRA_KEY> <EXTRA_FLOAT_VALUE>[,<EXTRA_FLOAT_VALUE...]]
[-n <COMPONENT>] [-f <FLAGS>]
[--grant-read-uri-permission] [--grant-write-uri-permission]
[--debug-log-resolution] [--exclude-stopped-packages]
[--include-stopped-packages]
[--activity-brought-to-front] [--activity-clear-top]
[--activity-clear-when-task-reset] [--activity-exclude-from-recents]
[--activity-launched-from-history] [--activity-multiple-task]
[--activity-no-animation] [--activity-no-history]
[--activity-no-user-action] [--activity-previous-is-top]
[--activity-reorder-to-front] [--activity-reset-task-if-needed]
[--activity-single-top] [--activity-clear-task]
[--activity-task-on-home]
[--receiver-registered-only] [--receiver-replace-pending]
[--selector]
[<URI> | <PACKAGE> | <COMPONENT>]

shell@android:/ $

Example: am broadcast -a com.blah.blah -e "foo" "bar"