error: resource android:attr/fontVariationSettings resource android:attr/ttcIndex not found.

当我运行ionic build android时，出现以下问题。 

解决这个问题如下：

• 查找和替换 com.android.support:support-v4: com.android.support:support-v4:27.1.0 在platform/android目录里。

• 将下面代码添加到platforms/android/app/build.gradle 和 platforms/android/build.gradle 文件里。

  configurations.all {
  resolutionStrategy {
      force 'com.android.support:support-v4:27.1.0'
  }}

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  Edited to answer “Where is this com.android.support:support-v4:+ setting ?” …

The setting will probably(in this case) be in one of your plugin’s .gradle file in the platform/android/ directory, for example in my case it was the starter-barcodescanner plugin so just go through all your plugins .gradle files : 

转自：https://blog.youkuaiyun.com/wumama123/article/details/79493190