幫助文檔：
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 while running.
--abi <ABI>: Launch the instrumented process with the selected ABI.
This assumes that the process supports the selected ABI.
例子：
1、運行一個類TestCase :am instrument -e class packagename.TestCase -w packagename/android.test.InstrumentationTestRunner
2、運行一個類TestCase的test方法 :am instrument -e class packagename.TestCase#test -w packagename/android.test.InstrumentationTestRunner