【PC和手机连接能力】有关ADB的一些知识

ADB是 Android Debug Bridge 的简称，在Google的ADT Bundle中已经带了

有关ADB的命令集：

Category	Command	Description	Comments
Target Device	-d	Direct an adb command to the only attached USB device.	Returns an error if more than one USB device is attached.
-e	Direct an adb command to the only running emulator instance.	Returns an error if more than one emulator instance is running.
-s <serialNumber>	Direct an adb command a specific emulator/device instance, referred to by its adb-assigned serial number (such as "emulator-5556").	See Directing Commands to a Specific Emulator/Device Instance.
General	devices	Prints a list of all attached emulator/device instances.	See Querying for Emulator/Device Instances for more information.
help	Prints a list of supported adb commands.
version	Prints the adb version number.
Debug	logcat [option] [filter-specs]	Prints log data to the screen.
bugreport	Prints dumpsys,dumpstate, and logcat data to the screen, for the purposes of bug reporting.
jdwp	Prints a list of available JDWP processes on a given device.	You can use the forward jdwp:<pid> port-forwarding specification to connect to a specific JDWP process. For example: adb forward tcp:8000 jdwp:472 jdb -attach localhost:8000
Data	install <path-to-apk>	Pushes an Android application (specified as a full path to an .apk file) to an emulator/device.
pull <remote> <local>	Copies a specified file from an emulator/device instance to your development computer.
push <local> <remote>	Copies a specified file from your development computer to an emulator/device instance.
Ports and Networking	forward <local> <remote>	Forwards socket connections from a specified local port to a specified remote port on the emulator/device instance.	Port specifications can use these schemes: tcp:<portnum> local:<UNIX domain socket name> dev:<character device name> jdwp:<pid>
ppp <tty> [parm]...	Run PPP over USB. <tty> — the tty for PPP stream. For exampledev:/dev/omap_csmi_ttyl. [parm]... — zero or more PPP/PPPD options, such asdefaultroute, local, notty, etc. Note that you should not automatically start a PPP connection.
Scripting	get-serialno	Prints the adb instance serial number string.	See Querying for Emulator/Device Instances for more information.
get-state	Prints the adb state of an emulator/device instance.
wait-for-device	Blocks execution until the device is online — that is, until the instance state isdevice.	You can prepend this command to other adb commands, in which case adb will wait until the emulator/device instance is connected before issuing the other commands. Here's an example: adb wait-for-device shell getprop Note that this command does not cause adb to wait until the entire system is fully booted. For that reason, you should not prepend it to other commands that require a fully booted system. As an example, the installrequires the Android package manager, which is available only after the system is fully booted. A command such as adb wait-for-device install <app>.apk would issue the install command as soon as the emulator or device instance connected to the adb server, but before the Android system was fully booted, so it would result in an error.
Server	start-server	Checks whether the adb server process is running and starts it, if not.
kill-server	Terminates the adb server process.
Shell	shell	Starts a remote shell in the target emulator/device instance.	See Issuing Shell Commands for more information.

ADB的基本功能：连接PC和电脑

可以实现的高级功能，包括：传输文件和资源，安装APK到手机

ADB可以杀掉ADB，只要权限够。

问题：

1. 如何从ADB拿到状态反馈？