我下载了TACO，创建了一个新的Ionic 2 RC项目，没有改变任何东西，单击播放 （F5）。
然后出现此错误：
Error Platform android already added.
可以做些什么来解决这个问题？
构建输出：
1>------ Build started: Project: ionic2-ts-blank1, Configuration: Debug Android ------
1> ------ Ensuring correct global installation of package from source package directory: C:Program Files (x86)Microsoft Visual Studio 14.0Common7IDEExtensionsApacheCordovaToolspackagesvs-tac
1> ------ Name from source package.json: vs-tac
1> ------ Version from source package.json: 1.0.42
1> ------ Package already installed globally at correct version.
1> ------ Cordova tools 6.3.1 already installed.
1> ------ Build Settings:
1> ------ Build Settings:
1> ------ platformConfigurationBldDir: c:tempionic2-ts-blank1ionic2-ts-blank1bldAndroidDebug
1> ------ platformConfigurationBinDir: c:tempionic2-ts-blank1ionic2-ts-blank1binAndroidDebug
1> ------ buildCommand: prepare
1> ------ platform: Android
1> ------ cordovaPlatform: android
1> ------ configuration: Debug
1> ------ cordovaConfiguration: Debug
1> ------ projectName: ionic2-ts-blank1
1> ------ projectSourceDir: c:tempionic2-ts-blank1ionic2-ts-blank1
1> ------ npmInstallDir: C:UsersTonyAppDataRoamingnpm
1> ------ language: en-US
1> ------ Adding platform: android
1> No scripts found for hook "before_platform_add".
1> No version supplied. Retrieving version from config.xml...
1>MSBUILD : cordova-build error : Platform android already added.
1> Platform android already added.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
========== Deploy: 0 succeeded, 0 failed, 0 skipped ==========
请确保您不在已经包含 ionic 应用程序的目录中，这可能会发生。