我不得不做上面两个答案的东西:

I had to do the stuff of both the answers above:

在 platforms/android/phonegap-plugin-barcodescanner:

搜索 compile 'com.android.support:support-v4:+ 并替换为 compile 'com.android.support:support-v4:27+'.

在平台/android:

搜索 cordova.system.library.2=com.android.support:support-v4:+ 并替换为 cordova.system.library.2=com.android.support:support-v4:27.1.0.

希望对你有帮助.