Cannot set the value of read-only property 'outputFile' for ApkVariantOutputImpl_Decorated{apkData=M

错误

Cannot set the value of read-only property ‘outputFile’ for ApkVariantOutputImpl_Decorated{apkData=Main{type=MAIN, fullName=debug, filters=[]}} of type com.android.build.gradle.internal.api.ApkVariantOutputImpl.

原因

Android 插件 3.0.0 引入了一些移除特定功能的 API 变更，可能会破坏您现有的构建。

output.outputFile变成了只读属性，不能再往里面写东西了;

参考：https://developer.android.google.cn/studio/build/gradle-plugin-3-0-0-migration.html#variant_api

解决

 android.applicationVariants.all { variant ->
        variant.outputs.each {
            def file = it.outputFile
            it.outputFile = new File(file.parent, file.name.replace(".apk", "-${variant.versionName}.apk"))
        }

    }
    改为
     variant.outputs.all {
            outputFileName  ="pudding" + "_v" + variant.versionName + "_"  + buildType.name + ".apk"
        }
	或者携带更全的参数
       variant.outputs.all {
           outputFileName  ="pudding" + "_v" +
                   defaultConfig.versionName + "_" + defaultConfig.versionCode + "_" +
                   new Date().format("yyyy-MM-dd") + "_" + buildType.name +
                   ".apk"
       }