原文: 新增cordova-plugin-file-opener2後，打包出錯

報錯如下：

* What went wrong:

Execution failed for task ':app:processDebugResources'.
> Failed to execute aapt


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output.


* Get more help at https://help.gradle.org


BUILD FAILED in 7s
(node:7000) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejec
tion id: 1): Error: cmd: Command failed with exit code 1 Error output:
C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\support-compat-28.0
.0-alpha1.aar\958f18514ef6665a8a428677fe3825c9\res\values\values.xml:20:5-70: AA
PT: error: resource android:attr/fontVariationSettings not found.


C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\support-compat-28.0
.0-alpha1.aar\958f18514ef6665a8a428677fe3825c9\res\values\values.xml:20:5-70: AA
PT: error: resource android:attr/ttcIndex not found.


D:\cordova\workspace\bbb\platforms\android\app\build\intermediates\incremental\m
ergeDebugResources\merged.dir\values\values.xml:86: error: resource android:attr
/fontVariationSettings not found.
D:\cordova\workspace\bbb\platforms\android\app\build\intermediates\incremental\m
ergeDebugResources\merged.dir\values\values.xml:86: error: resource android:attr
/ttcIndex not found.

error: failed linking references.

此問題基本是grade版本衝突問題，本人找到的解決方法是，在打包目錄下與**\platforms\android\app，在與build.gradle同一級目錄下，建立檔案，名稱為build-extras.gradle，內容為

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