通過(guò)am命令可以啟動(dòng)任何一個(gè)activity，如果啟動(dòng)Main Activity就等于是啟動(dòng)了相應(yīng)的apk

am 命令代碼位置：frameworks\base\cmds\am\src\com\android\commands\am

使用 am -help 可以查看該命令詳細(xì)的用法，以下是截取的部分常用用法：

     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>
    --sampling INTERVAL: use sample profiling with INTERVAL microseconds  between samples (use with --start-profiler)
    -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 stopservice: stop 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.
           --receiver-permission <PERMISSION>: Require receiver to hold permission.

1. 啟動(dòng)一個(gè)指定的組件

****命令： **am start -n <COMPONENT> **

adb shell am start -n 包名 / 包含包名的Activity 或者service

Camera（照相機(jī)）的啟動(dòng)：

adb shell am start -n com.android.camera/com.android.camera.Camera

Browser（瀏覽器）的啟動(dòng)：

adb shell am start -n com.android.browser/com.android.browser.BrowserActivity

2. 使用Action隱式的啟動(dòng)

按照指定的地址啟動(dòng)瀏覽器:

adb shell am start -a android.intent.action.VIEW -d  http://www.baidu.cn/

撥打電話 :

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

3. 啟動(dòng)一個(gè)服務(wù)service

am startservice -n com.android.music/com.android.music.MediaService

4. 發(fā)送一個(gè)廣播

am broadcast -a