usage: am [subcommand] [options]

start an Activity: am start [-D] <INTENT>
        -D: enable debugging

send a broadcast Intent: am broadcast <INTENT>

start an Instrumentation: am instrument [flags] <COMPONENT>
        -r: print raw results (otherwise decode REPORT_KEY_STREAMRESULT)
        -e <NAME> <VALUE>: set argument <NAME> to <VALUE>
        -p <FILE>: write profiling data to <FILE>
        -w: wait for instrumentation to finish before returning

start profiling: am profile <PROCESS> start <FILE>
    stop profiling: am profile <PROCESS> stop

<INTENT> specifications include these flags:
        [-a <ACTION>] [-d <DATA_URI>] [-t <MIME_TYPE>]
        [-c <CATEGORY> [-c <CATEGORY>] ...]
        [-e|--es <EXTRA_KEY> <EXTRA_STRING_VALUE> ...]
        [--ez <EXTRA_KEY> <EXTRA_BOOLEAN_VALUE> ...]
        [-e|--ei <EXTRA_KEY> <EXTRA_INT_VALUE> ...]
        [-n <COMPONENT>] [-f <FLAGS>] [<URI>]

启动的方法为

# am start -n 包(package)名/包名.活动(activity)名称

启动的方法可以从每个应用的AndroidManifest.xml的文件中得到

Music 和 Video（音乐和视频）的启动方法为：

# am start -n com.android.music/com.android.music.MusicBrowserActivity

# am start -n com.android.music/com.android.music.VideoBrowserActivity

# am start -n com.android.music/com.android.music.MediaPlaybackActivity

Camera（照相机）的启动方法为：

# am start -n com.android.camera/com.android.camera.Camera

Browser（浏览器）的启动方法为：

# am start -n com.android.browser/com.android.browser.BrowserActivity

启动浏览器 :

am start -a android.intent.action.VIEW -d  http://www.google.cn/

拨打电话 :

am start -a android.intent.action.CALL -d tel:10086

启动 google map 直接定位到北京 :

am start -a android.intent.action.VIEW geo:0,0?q=beijing

url:http://greatverve.cnblogs.com/archive/2012/02/10/android-am.html