在Android模拟器上运行的Cordova错误:"android:命令失败，退出代码2" [英] Cordova error running on android emulator: "android: Command failed with exit code 2"

问题描述

我正在尝试在Android模拟器中运行Cordova项目:

I'm trying to run my cordova project in an android emulator:

cordova emulate android

构建成功，但仿真器未启动，并且出现错误:

The build is successful but the emulator is not starting and I get an error:

Error: android: Command failed with exit code 2

运行cordova requirements时我得到的是相同的东西:

I get the same thing when running cordova requirements:

Requirements check results for android:
Java JDK: installed 1.8.0
Android SDK: installed true
Android target: not installed
android: Command failed with exit code 2
Gradle: installed /opt/android-studio/gradle/gradle-3.2/bin/gradle
Error: Some of requirements check failed

我已经将Android SDK工具升级到26.0.1，并且android命令不再对我有用.因此，我按照发布页面的说明安装了cordova-android@6.2.1并在我的项目中使用它:

I've upgraded Android SDK Tools to 26.0.1 and android command doesn't work for me anymore. So I installed cordova-android@6.2.1 as the release page says and use it in my project:

$ cordova platform ls
Installed platforms:
  android 6.2.1
Available platforms:
  amazon-fireos ~3.6.3 (deprecated)
  blackberry10 ~3.8.0
  browser ~4.1.0
  firefoxos ~3.6.3
  ubuntu ~4.3.4
  webos ~3.7.0

但是错误仍然发生.有谁知道为什么会这样?

But the error still happens. Does anyone has any ideas why this happens?

推荐答案

我认为Android SDK的新版本与cordova仿真不兼容，因此我对此进行了更改:

I think that a new version of Android SDK is not compatible with cordova emulation, so I change this:

return superspawn.spawn('android', ['list', 'avds'])

对此:

return superspawn.spawn('android', ['list', 'avd'])

内部

platforms/android/cordova/lib/emulator.js

，您的错误已修复.发生这种情况是因为在新的SDK中，命令"android list avds"已更改为"android list avd".感谢 Douglas Neves

and your error was fixed. That happens 'cause the command "android list avds" was changed to "android list avd" inside a new SDK. Thanx to Douglas Neves

如果在那之后您将遇到另一个错误:

If after that you'll catch another error like this:

Failed to install ... Failure [INSTALL_FAILED_VERSION_DOWNGRADE]

您需要对此进行更改:

var command = 'adb -s ' + target + ' install -r "' + apk + '"';

对此:

var command = 'adb uninstall "' + pkgName + '"; adb -s ' + target + ' install -r "' + apk + '"';

在同一文件中.此代码将在安装前卸载应用程序，因此版本问题将消失.

in the same file. This code will uninstall app before install it, so version problem will be disappeared.

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