Ionic：无法构建Android应用

Question

我正在尝试使用inonic build android构建Android应用程序，但出现以下错误：

running cordova build android
Running command: "c:\Program Files\nodejs\node.exe" c:\xampp\htdocs\discipulado\
discipulado\hooks\after_prepare\010_add_platform_class.js c:/xampp/htdocs/discip
ulado/discipulado
add to body class: platform-android
Running command: c:\xampp\htdocs\discipulado\discipulado\platforms\android\cordo
va\build.bat
[Error: Please install Android target: "android-21".

Hint: Open the SDK manager by running: C:\Users\Thiago\AppData\Local\Android\sdk
\tools\android.BAT
You will require:
1. "SDK Platform" for android-21
2. "Android SDK Platform-tools (latest)
3. "Android SDK Build-tools" (latest)]
ERROR building one of the platforms: Error: c:\xampp\htdocs\discipulado\discipul
ado\platforms\android\cordova\build.bat: Command failed with exit code 2
You may not have the required environment or OS to build this project
Error: c:\xampp\htdocs\discipulado\discipulado\platforms\android\cordova\build.b
at: Command failed with exit code 2
    at ChildProcess.whenDone (c:\Users\Thiago\AppData\Roaming\npm\node_modules\c
ordova\node_modules\cordova-lib\src\cordova\superspawn.js:131:23)
    at ChildProcess.emit (events.js:110:17)
    at maybeClose (child_process.js:1015:16)
    at Process.ChildProcess._handle.onexit (child_process.js:1087:5)

我已经安装了Apache Ant，但是错误仍然存​​在。 我用ionic platform remove android平台，并用ionic platform add android ，但没有成功。

任何想法？

更新我已经安装了Android Studio和Android SDK工具。

Answer 1

如错误所示，您的系统需要安装“ android-21”，即Android 5.0 Lollipop