ionic3 打包错误解决：Could not resolve all files for configuration ':classpath'.

问题：IONIC打包时报错，ionic cordova build android --debug

 

将下面目录文件的 mavenCentral()、jcenter() 

platforms/android/build.gradle
platforms/android/app/build.gradle
platforms/android/CordovaLib/build.gradle 

改为下面内容，随后再重新执行 ionic cordova build android --debug 即可：

maven { 
    url "https://maven.google.com" 
}
jcenter { 
    url "http://jcenter.bintray.com/"
}

若还是失败，先根据AS提示升级更新，再重新执行上述过程；

 

参考：https://forum.ionicframework.com/t/build-fails-on-android-could-not-resolve-all-files-for-configuration/119024