Ionic中的Android构建Android失败了

Question

在更新Android Studio之后，尝试在离子2中构建Android平台时，此错误开始出现。

  Ionic Info:
   ionic (Ionic CLI)  : 4.3.0 (/usr/local/lib/node_modules/ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.1.9
Cordova:
   cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
   Cordova Platforms     : android 6.4.0
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 1.2.1, (and 15 other plugins)
System:
   NodeJS : v8.12.0 (/usr/local/bin/node)
   npm    : 6.4.1
   OS     : macOS Sierra
   Xcode  : Xcode 8.3.2 Build version 8E2002

失败：构建失败而异常。

What went wrong:
Execution failed for task ’:transformClassesWithDexBuilderForDebug’. >

com.android.build.api.transform.transformexception： com.android.builder.dexing.dexarchivebuilderexception： com.android.builder.dexing.dexarchivebuilderexception：

Failed to process /.gradle/caches/modules-2/files-2.1/com.squareup.okhttp3/okhttp/3.13.1/b49cf3799bd473199e96c4fb9987e9e08395a1c0/okhttp-3.13.1.jar

发现dexbuilder错误与Java版本8有关。

Answer 1

在" build.gradle"文件中修改这些选项/platforms/android文件夹解决了问题

compileOptions {
   sourceCompatibility JavaVersion.VERSION_1_8
   targetCompatibility JavaVersion.VERSION_1_8
}