Android am 指令的使用

http://blog.csdn.net/stoppig/article/details/50715773

何为am指令

Android自带的命令也有些linux本身没有，而android特有的。例如android的am命令，am命令常见使用方法如下： am [subcommand] [options]，即命令后面跟着一个子命令，因为是子命令而不是参数，所以不用加-，而后面的参数就需要加-，比如am
start -a *，start在这里就是子命令，-a在这里就是参数。

直接去看下am的代码Am.Java。每次在shell环境下执行am即启动一个线程执行Am.java的主函数，这个主函数的主要实现都在run方法里面，am命令后面带的参数会当做运行时参数传递个主方法，后面会根据传入的参数不同，执行不同的条件分支。可以看到当参数的个数小于1的时候，就执行showUsage()方法，即说明am命令使用方式的方法，并且有最常用的参数intent的详细使用说明。am命令中最常用到的是start命令，下面来看下这个命令的执行过程。

代码根据第一个参数判断是否是start子命令，进入private void runStart() throws Exception方法，接着进入执行解析参数的关键方法 private Intent makeIntent(int defUser) throws URISyntaxException里面。makeIntent里面用while循环根据传入的参数一点一点的配置即将使用的intent，大的比如intent的action，data小的比如flag，参数等。回到runStart方法，首先是检查am start是否接着-S（stop）参数，如果不是就跨进程调用am服务执行命令。到这里am及其start子命令的执行过程基本介绍完了。

am指令查看

命令窗口通过adb shell 进入android 的Linux命令界面，输入am -help看到如下信息：

am指令使用

我们可以通过命令启动android中的Activity，Service，BroadcastReceiver 等组件

拨打一个电话：

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

这里-a表示动作，-d表述传入的数据，还有-t表示传入的类型。
打开一个网页：

am start -a android.intent.action.VIEW -d http://www.baidu.com （这里-d表示传入的data）
打开音乐播放器：

am start -a android.intent.action.MUSIC_PLAYER 或者

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

（包名和应用名可以在Androidmanifest.xml文件查看到）
启动一个服务：

am startservice <服务名称>

例如：am startservice -n com.android.music/com.android.music.MediaPlaybackService (这里-n表示组件)

或者 am startservice -a com.smz.myservice (这里-a表示动作，就是你在Androidmanifest里定义的)
发送一个广播：

am broadcast -a <广播动作>

例如： am broadcast -a com.smz.mybroadcast
还可放在代码中操作。

<code class="hljs sql has-numbering">    char intent[1024] = {0};
sprintf(intent, "am <span class="hljs-operator"><span class="hljs-keyword">start</span> -a com.android.browser.ProxySelector);</span>
system(intent);</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li></ul>

注：在SDK17之后，由于权限的问题，要记得在加上 –USER 0

例如：AM BROADCAST –USER 0 -A COM.EXAMPLE.TEST

am指令全集

目标文件在\frameworks\base\cmds\am\src\com\android\commands\am

usage: am [subcommand] [options]

usage: am start [-D] [-W] [-P ] [–start-profiler ]

[–R COUNT] [-S] [–opengl-trace]

[–user | current]

am startservice [–user | current]

am stopservice [–user | current]

am force-stop [–user | all | current]

am kill [–user | all | current]

am kill-all

am broadcast [–user | all | current]

am instrument [-r] [-e ] [-p ] [-w]

[–user | current]

[–no-window-animation]

am profile start [–user current]

am profile stop [–user current] []

am dumpheap [–user current] [-n]

am set-debug-app [-w] [–persistent]

am clear-debug-app

am monitor [–gdb ]

am hang [–allow-restart]

am restart

am idle-maintenance

am screen-compat [on|off]

am to-uri [INTENT]

am to-intent-uri [INTENT]

am switch-user

am stop-user

am stack create

am stack movetask [true|false]

am stack resize

am stack boxes

am stack box

am start: start an Activity. Options are:

-D: enable debugging

-W: wait for launch to complete

–start-profiler : start profiler and send results to

-P : like above, but profiling stops when app goes idle

-R: repeat the activity launch 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 | current: Specify which user to run as; if not

specified then run as the current user.

am startservice: start a Service. Options are:

–user | current: Specify which user to run as; if not

specified then run as the current user.

am stopservice: stop a Service. Options are:

–user | current: Specify which user to run as; if not

specified then run as the current user.

am force-stop: force stop everything associated with .

–user | all | current: Specify user to force stop;

all users if not specified.

am kill: Kill all processes associated with . Only kills.

processes that are safe to kill – that is, will not impact the user

experience.

–user | 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 | all | current: Specify which user to send to; if not

specified then send to all users.

–receiver-permission : Require receiver to hold permission.

am instrument: start an Instrumentation. Typically this target

is the form /. Options are:

-r: print raw results (otherwise decode REPORT_KEY_STREAMRESULT). Use with

[-e perf true] to generate raw output for performance measurements.

-e : set argument to . For test runners a

common form is [-e [,…]].

-p : write profiling data to

-w: wait for instrumentation to finish before returning. Required for

test runners.

–user | current: Specify user instrumentation runs in;

current user if not specified.

–no-window-animation: turn off window animations while running.

am profile: start and stop profiler on a process. The given argument

may be either a process name or pid. Options are:

–user | 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 argument may

be either a process name or pid. Options are:

-n: dump native heap instead of managed heap

–user | current: When supplying a process name,

specify user of process to dump; uses current user if not specified.

am set-debug-app: set application 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 hang: hang the system.

–allow-restart: allow watchdog to perform normal system restart

am restart: restart the user-space system.

am idle-maintenance: perform idle maintenance now.

am screen-compat: control screen compatibility mode of .

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.

am stack create: create a new stack relative to an existing one.

: the task to populate the new stack with. Must exist.

: existing stack box’s id.

: 0: before , per RTL/LTR configuration,

1: after , per RTL/LTR configuration,

2: to left of ,

3: to right of , 4: above , 5: below

: float between 0.2 and 0.8 inclusive.

am stack movetask: move from its current stack to the top (true) or bottom (false) of .

am stack resize: change relative size to new .

am stack boxes: list the hierarchy of stack boxes and their contents.

am stack box: list the hierarchy of stack boxes rooted at .

specifications include these flags and arguments:

[-a ] [-d ] [-t ]

[-c [-c ] …]

[-e|–es …]

[–esn …]

[–ez …]

[–ei …]

[–el …]

[–ef …]

[–eu …]

[–ecn ]

[–eia [,