ADB是什么，做android开发的没有不知道的。
window下运行cmd，输入adb help就会打印adb都能够做的事情，包括 adb push 。。adb pull 。。 adb devices adb install。。。 等等。。并且一搜一大把。
其中有一个命令叫做 adb shell，android是基于linux的，shell模式下linux的命令可是非常多的，android去掉了许多linux的命令，那么从这写命令里面又能够发现什么宝藏呢？寻宝之旅开启！！
首先linux的shell模式有许多命令，例如 ls cd mkdir su ps vim等等许多控制命令，这些在android上都是支持的。但是它是android的内核啊，应该有些特殊点的吧。
通过命令cd /system/bin 进入bin目录查看一下。
# cd /system/bin cd /system/bin # ls ls BlobCache_test InputChannel_test InputDispatcher_test InputEvent_test InputPublisherAndCons InputReader_test Looper_test ObbFile_test String8_test Unicode_test ZipFileRO_test adb am app_process applypatch applypatch_static ash audioloop bmgr bootanimation bu bugreport cat check_prereq chmod chown cmp dalvikvm date dd debuggerd decoder dexopt df dhcpcd dmesg dumpstate dumpsys flash_image fsck_msdos gdbjithelper gdbserver getevent getprop gzip hd id ifconfig iftop ime input insmod installd ioctl ionice ip6tables iptables keystore keystore_cli kill linker ln log logcat logwrapper ls lsmod lsof mediaserver mkdir monkey mount mtpd mv nandread ndc netcfg netd netstat newfs_msdos notify omx_tests ping ping6 pm pppd printenv ps qemu-props qemud r racoon radiooptions reboot record recordvideo recovery renice rild rm rmdir rmmod route run-as schedtest schedtop screencap screenshot sdcard sendevent sensorservice service servicemanager setconsole setprop sf2 sh showlease simg2img skia_test sleep smd stagefright start stop stream surfaceflinger svc sync system_server testid3 toolbox top touch umount updater uptime vdc vmstat vold watchprops wipe #
噢 my god 命令还是很多的嘛！
我们一般可以通过 命令 -h 来查看介绍，例如：
# am -h
am -h
usage: am [subcommand] [options]
usage: am start [-D] [-W] [-P <FILE>] [--start-profiler <FILE>]
[--R COUNT] [-S] <INTENT>
am startservice <INTENT>
am force-stop <PACKAGE>
am kill <PACKAGE>
am kill-all
am broadcast <INTENT>
am instrument [-r] [-e <NAME> <VALUE>] [-p <FILE>] [-w]
[--no-window-animation] <COMPONENT>
am profile [looper] start <PROCESS> <FILE>
am profile [looper] stop [<PROCESS>]
am dumpheap [flags] <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|MxN]
am to-uri [INTENT]
am to-intent-uri [INTENT]
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
am startservice: start a Service.
am force-stop: force stop everything associated with <PACKAGE>.
am kill: Kill all processes associated with <PACKAGE>. Only kills.
processes that are safe to kill -- that is, will not impact the user
experience.
am kill-all: Kill all background processes.
am broadcast: send a broadcast Intent.
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.
--no-window-animation: turn off window animations will running.
am profile: start and stop profiler on a process.
am dumpheap: dump the heap of a process. Options are:
-n: dump native heap instead of managed heap
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 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 to-uri: print the given Intent specification as a URI.
am to-intent-uri: print the given Intent specification as an intent: URI.
<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> ...]
[--eu <EXTRA_KEY> <EXTRA_URI_VALUE> ...]
[--eia <EXTRA_KEY> <EXTRA_INT_VALUE>[,<EXTRA_INT_VALUE...]]
[--ela <EXTRA_KEY> <EXTRA_LONG_VALUE>[,<EXTRA_LONG_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>]
Error: Unknown command: -h
虽然-h没法识别，可还是打印出了参数的。
1、am命令是非常有用的一个命令，使用此命令可以启动 activity, services；发送 broadcast等等。
使用实例：如启动一个 Activity：
格式：adb shell am start -n 包名/包名＋类名（-n 类名,-a action,-d date,-m MIME-TYPE,-c category,-e 扩展数据,等）。
实例1：C:\Users\Administrator>adb shell am start -n com.android.camera/.CameraStarting: Intent { cmp=com.android.camera/.Camera }
实例2：（带extra 的 intent）C:\Users\Administrator>adb shell am start -n com.android.camera/.Camera -e abc helloStarting: Intent { cmp=com.android.camera/.Camera (has extras) }其中 extra 的 key 为 abc ,value 为字串 "hello"
还可以发送命令模拟手机低电环境：
实例：adb shell am broadcast -a android.intent.action.BATTERY_CHANGED --ei "level" 3 --ei "scale" 100
2、getprop/watchprops
getprop列出系统的属性,前面十名字,后面是值
# getprop
getprop
[ro.secure]: [0]
[ro.allow.mock.location]: [1]
[ro.debuggable]: [1]
[persist.service.adb.enable]: [1]
[ro.kernel.qemu]: [1]
[ro.kernel.console]: [ttyS0]
[ro.kernel.android.checkjni]: [1]
[ro.kernel.android.qemud]: [ttyS1]
[ro.kernel.android.ndns]: [1]
[ro.factorytest]: [0]
[ro.serialno]: []
3、watchprosp动态监视这些属性的变化,比如我修改系统的语言为中文,就会打印出:
# watchprops
watchprops
1269420653 persist.sys.language = ‘zh‘
1269420653 persist.sys.language = ‘CN‘
4、 wipe <system|data|all>
wipe表示清除模拟器或者真机上的数据,比如你的模拟器用了很久,装了很多软件就可以用这个来清除
system表示清除 /system下的数据
data表述清除 /data 下的数据