失败 [INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE]

Question

我在CMD中输入了下面的命令，命令下面返回了错误。

命令：

phonegap run android --verbose --stacktrace

错误：

ERROR: Failed to launch application on device:

ERROR: Failed to install apk to device: pkg: /data/local/tmp/MainActivity-debug.apk

Failure [INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE]

Answer 1

解法：

我通过从我的设备上卸载我的应用程序设法摆脱了错误。

原因：

可能导致错误的原因是我将 Android SDK 更新为 SDK Manager。

Answer 2

这里的问题是，您尝试安装的 APK 版本低于您设备上已有的版本。

卸载肯定会为您解决该问题。

ADB 允许更大的灵活性 adb install -r -d <apk path>，但我不确定 Phonegap 是否具有该功能。

adb install [-lrtsdg] <file>
   - push this package file to the device and install it
     (-l: forward lock application)
     (-r: replace existing application)
     (-t: allow test packages)
     (-s: install application on sdcard)
     (-d: allow version code downgrade)
     (-g: grant all runtime permissions)

更新：

原来这不是降级App版本的正确错误信息。事实上，它是完全不同的东西。我found this link准确说明情况：

tl;dr You can't fool the new Android 6 permissions model by first publishing an APK with targetSdk 23 which will grant all permissions runtime and then publishing a new version with targetSdk 22 or less. You'll get an INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE error.

I was working on an app with targetSdk 23 (Android 6 Marshmallow) when it hit me that it possibly could be a security issue with the new Android permission model. Android 6 devices approves all permission on install time and then the user has to approve them whenever the app asks for the permission. What if the user installed the app - auto granting all permissions - and then it didn't ask for using them, and then afterwards the app was updated with the same permissions, but with a lower targetSdk?

I spent a couple minutes creating an app that targeted SDK level 23 and added a fine location permission (ACCESS_FINE_LOCATION). Then I installed and ran the app. The app didn't ask for permission to access the location manager. Then I set the SDK level to 22 and tried to install the app. Luckily it wasn't able to install. I got an error saying Failure [INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE].

Answer 3

我在 VS2015 中使用 TACO 并使用特定模拟器配置文件调试 Android 时遇到此错误：VS Emulator 10.1" Marshmallow (6.0.0) XHDPI Tablet。我正在处理的项目安装为该特定配置文件上的应用程序，因为我一直在使用它进行调试。我通过卸载并重新安装该特定配置文件解决了这个问题：工具 -> Visual Studio Android 的模拟器 -> 卸载配置文件。重新安装的配置文件没有不再包含我的应用程序并且错误消失了。我猜这相当于从远程设备卸载应用程序的 VS 模拟器。

失败 [INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE]

Failure [INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE]

android

command

cordova

cordova-cli