我见过类似的问题，但无法解决我的问题。
我有一个Ionic 3项目，想要添加Android。
ionic cordova platform add android
几分钟后它会问我：
Platform android not detected. Would you like to install it?
我用YES回答。
过了一会儿，它会告诉我：
[ERROR] No platforms detected. Please run: ionic cordova platform add
所以这是鸡蛋问题。
任何想法该怎么做？
以下是完整的控制台输出：
ionic cordova platform add android
> cordova platform add android --save
✔ Running command - done!
> ionic cordova resources android --force
✔ Collecting resource configuration and source images - done!
? Platform android not detected. Would you like to install it? Yes
> cordova platform add android --save
✔ Running command - done!
[ERROR] No platforms detected. Please run: ionic cordova platform add