有关将来参考：
在升级到SDK工具R22时，这种错误可能表现。
更新后，您需要重新打开SDK管理器。在这里，你会发现一个新的包 - Android SDK中构建的工具。
获得此为好，问题就解决了​​。

For future reference: This error could manifest when upgrading to SDK Tools r22. After updating, you need to reopen the SDK Manager. Here you would find a new package - Android SDK Build-tools. Get this as well, and problem solved.