尝试在ionic中编译发布应用程序时出现此错误
Dex: Error converting bytecode to dex:
Cause: Dex cannot parse version 52 byte code.
This is caused by library dependencies that have been compiled using Java 8 or above.
If you are using the 'java' gradle plugin in a library submodule add
targetCompatibility = '1.7'
sourceCompatibility = '1.7'
to that submodule's build.gradle file.
离子信息：
@ionic/cli-utils : 1.19.2
ionic (Ionic CLI) : 3.20.0
全局软件包：
cordova (Cordova CLI) : 8.0.0
本地套餐：
@ionic/app-scripts : 1.1.0
Cordova Platforms : android 6.3.0 ios 4.5.4 …