在Android编程学习中，在看相关PackageManager代码时，无意中发现Android 下提供一个pm命令，通常放在/system/bin/下。这个命令与Package有关，且非常实用。所以研究之。希望对大家学习Android编程有所帮助。

0. Usage：

usage: pm [list|path|install|uninstall]

pm list packages [-f]

pm list permission-groups

pm list permissions [-g] [-f] [-d] [-u] [GROUP]

pm list instrumentation [-f] [TARGET-PACKAGE]

pm list features

pm path PACKAGE

pm install [-l] [-r] [-t] [-i INSTALLER_PACKAGE_NAME] [-s] [-f] PATH

pm uninstall [-k] PACKAGE

pm enable PACKAGE_OR_COMPONENT

pm disable PACKAGE_OR_COMPONENT

pm setInstallLocation [0/auto] [1/internal] [2/external]

The list packages command prints all packages. Options:

-f: see their associated file.

The list permission-groups command prints all known

permission groups.

The list permissions command prints all known

permissions, optionally only those in GROUP. Options:

-g: organize by group.

-f: print all information.

-s: short summary.

-d: only list dangerous permissions.

-u: list only the permissions users will see.

The list instrumentation command prints all instrumentations,

or only those that target a specified package. Options:

-f: see their associated file.

The list features command prints all features of the system.

The path command prints the path to the .apk of a package.

The install command installs a package to the system. Options:

-l: install the package with FORWARD_LOCK.

-r: reinstall an exisiting app, keeping its data.

-t: allow test .apks to be installed.

-i: specify the installer package name.

-s: install package on sdcard.

-f: install package on internal flash.

The uninstall command removes a package from the system. Options:

-k: keep the data and cache directories around.

after the package removal.

The enable and disable commands change the enabled state of

a given package or component (written as "package/class").

The getInstallLocation command gets the current install location

0 [auto]: Let system decide the best location

1 [internal]: Install on internal device storage

2 [external]: Install on external media

The setInstallLocation command changes the default install location

0 [auto]: Let system decide the best location

1 [internal]: Install on internal device storage

2 [external]: Install on external media

1. 具体使用方法：

1.1：察看已安装的包：

pm list package

此时则显示所有已经安装的包名。

pm list package -f

也显示associated文件所在目录(即保存的APK文件)

1.2：察看已知的权限组：

pm list permission-groups

1.3：察看所有已知的权限：

pm list permissions

1.4：列出所有硬件相关信息：

pm list features

结果通常类似：

feature:reqGlEsVersion=0x20000

feature:android.hardware.bluetooth

feature:android.hardware.camera

feature:android.hardware.location

feature:android.hardware.location.network

feature:android.hardware.microphone

feature:android.hardware.sensor.accelerometer

feature:android.hardware.sensor.compass

feature:android.hardware.touchscreen

feature:android.hardware.wifi

1.5：列出指定包名的associated文件(APK存档文件)所在：

例如：

pm path com.TDiJoy.fane

package:/mnt/asec/com.TDiJoy.fane-1/pkg.apk

1.6: 安装APK：

pm install [-l] [-r] [-t] [-i INSTALLER_PACKAGE_NAME] [-s] [-f] PATH

PATH 指 APK文件绝对路径和文件名。

例如：

pm install /data/3dijoy_fane.apk

这几个参数很有用：

-r: 安装一个已经安装的APK，保持其数据不变。

-i：指定安装的包名。(没试出来)

-s: 安装到SDCard上。

-f: 安装到内部Flash上。

1.6：卸载APK：

pm uninstall 包名。

例如：

pm uninstall com.TDiJoy.fane

1.7: 得到和设置缺省安装位置：

The getInstallLocation command gets the current install location

0 [auto]: Let system decide the best location

1 [internal]: Install on internal device storage

2 [external]: Install on external media

The setInstallLocation command changes the default install location

0 [auto]: Let system decide the best location

1 [internal]: Install on internal device storage

2 [external]: Install on external media

pmgetInstallLocation

得到缺省的安装位置。

设置：

pm setInstallLocation <0|1|2>

0: 自动。

1：内部Flash。

2：扩展存储设备。

实例：如何在海信2.2 STB上将APK安装到U盘中：

Sam首先尝试使用：

pm setInstallLocation 2

之后安装之，没有用。

后来做如下尝试：

在其它设置->存储设备->制定默认存储设备中选择U盘为默认存储设备。

# pm install -s xxxx.apk

就可以成功。

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