java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0

严重性代码说明项目文件行禁止显示状态
错误 xamarin java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
xama

C:Program Files (x86)MSBuildXamarinAndroidXamarin.Android.Common.targets(3,3): Error: java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0 (FGH)

SDK Build Tools Version: 24 rc2

The "Build Tools Version" looks like it might be the problem. Xamarin.Android is not yet compatible with the "24 rc2" Build-tools version from the "Preview Channel" in the Android SDK Manager. You can uninstall that preview version and install one of the non-preview versions of the Build-tools (such as 23.0.3) using the Android SDK Manager.

Update June 16, 2016:

The non-preview version of Android SDK Build-tools version 24 is now available in the Android SDK Manager. Xamarin.Android is not yet compatible with that version either.

Update July 14, 2016:

Unsupported major.minor version 52.0

It turns out this error message is caused by an incompatibility with the Java JDK rather than with Xamarin.Android: Android SDK Build-tools version 24 requires Java JDK 1.8, whereas earlier versions were still compatible with Java JDK 1.7. (This resembles older answers about the same error.)

Update July 25, 2016:

Google has now released Android SDK Build-tools 24.0.1. That version fixes a bug in aapt that was present in version 24. So you can now update to Build-tools 24.0.1 if desired, but you must also update to Java JDK 8.

Steps to update:

Update to Java JDK 8.
Install Android SDK Build-tools 24.0.1.
(Optional) Uninstall the older Android SDK Build-tools 24 that contains the aapt bug:

Alternatives:

If you would rather not update to Java JDK 8 yet, you can instead do one of the following.

Uninstall all Android SDK Build-tools versions 24 and higher via the Android SDK manager.
Or set the AndroidSdkBuildToolsVersion MSBuild property to an earlier version. For example, if you also have version 23.0.3 installed, you could add the following line within the top <PropertyGroup> element in the Android project .csproj file:
```
<AndroidSdkBuildToolsVersion>23.0.3</AndroidSdkBuildToolsVersion>
```

引用自：http://stackoverflow.com/questions/36457947/java-lang-unsupportedclassversion-error-in-xamarin-studio/36458217