使用Runtime.exec（...）运行dpm [英] Running dpm with Runtime.exec(...)

问题描述

此答案表明Android应用可以运行 dpm 像这样：

This answer suggests that an Android app can run dpm like this:

Runtime.getRuntime().exec("dpm set-device-owner com.test.my_device_owner_app");

这在运行5.1.1的Nexus 4上无提示地失败了。外壳程序返回错误代码0（成功），并且没有控制台输出。尽管取得了明显的成功，但我的应用并未成为设备所有者。该设备是从出厂重置中恢复的，未配置任何用户帐户。

This fails silently on my Nexus 4 running 5.1.1. The shell returns an error code of 0 (success) and there is no console output. Despite the apparent success, my app does not become the device owner. The device is fresh from a factory reset, with no user account configured.

作为控件，我尝试运行垃圾命令而不是 dpm 。它会按预期失败。

As a control, I tried running a garbage command instead of dpm. It fails as expected.

这曾经奏效吗？

推荐答案

dpm 错误地退出并显示状态代码错误的命令语法时为0。正确的语法是 dpm set-device-owner package / .ComponentName 。当正确使用语法时， exec（...）会引发 SecurityException ：

dpm incorrectly exits with a status code of 0 when you get the command syntax wrong. The correct syntax is dpm set-device-owner package/.ComponentName. When you get the syntax right, exec(...) throws a SecurityException:

java.lang.SecurityException: Neither user 10086 nor current process has android.permission.MANAGE_DEVICE_ADMINS.
  at android.os.Parcel.readException(Parcel.java:1546)
  at android.os.Parcel.readException(Parcel.java:1499)
  at android.app.admin.IDevicePolicyManager$Stub$Proxy.setActiveAdmin(IDevicePolicyManager.java:2993)
  at com.android.commands.dpm.Dpm.runSetDeviceOwner(Dpm.java:110)
  at com.android.commands.dpm.Dpm.onRun(Dpm.java:82)
  at com.android.internal.os.BaseCommand.run(BaseCommand.java:47)
  at com.android.commands.dpm.Dpm.main(Dpm.java:38)
  at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method)
  at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:249)

将此权限添加到清单中无济于事，因此它可能是系统权限。

Adding this permission to the manifest does not help, so maybe it's a system-only permission.

在没有NFC的设备上部署信息亭模式的应用程序已经很麻烦了，因为您必须启用开发人员模式并通过 adb 。我想配置者将只需要手动运行 dpm 。

It's already a pain in the butt to deploy a kiosk mode app on a device without NFC, since you have to enable developer mode and install the app via adb. I guess the provisioner will just have to run dpm manually.

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