[Android Pro] app_process command in Android

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reference to : http://blog.csdn.net/wangkaiblog/article/details/46050587

本來以為存放在／systen／bin／下的monkey、input、am等adb shell命令都是二進位可執行程，偶爾cat input下，發現不是二進位檔案，內容如下：

# Script to start "input" on the device, which has a very rudimentary# shell.#base=/systemexport CLASSPATH=$base/framework/input.jarexec app_process $base/bin com.android.commands.input.Input $*

這段指令碼的作用就是通過app_process工具啟動放在／system／farmework／下的input.jar 檔案。我查看了下framework檔案夾裡面的確有input.jar檔案。

What is this app_process

Although not that popular “app_process” command is used heavily in Android, for example the well know “am” script is using it. Everybody knows how to start an application from adb shell:
am start -n yourpackagename/.activityname
However “am” is just a shell script and what stays in the base of the am script is our app_process binary:

[email protected]:/ # cat /system/bin/amcat /system/bin/am# Script to start "am" on the device, which has a very rudimentary# shell.base=/systemexport CLASSPATH=$base/framework/am.jarexec app_process $base/bin com.android.commands.am.Am "[email protected]"[email protected]:/ #

So app_process is the binary used to start java code. All the apps, instrumentations or installations are tarted using this.

Lets see the official usage output:

[email protected]:/ # app_processUsage: app_process [java-options] cmd-dir start-class-name [options]Not quite complete as usual :)

 

[Android Pro] app_process command in Android