Flutter API ‘variantOutput.getProcessResources()‘ is obsolete and has been replaced with ‘variantOut

由于flutter 版本过低导致 打包报错：

API 'variantOutput.getProcessResources()' is obsolete and has been replaced with 'variantOut

解决办法：
1、在Flutter 安装目录中找到 flutter.gradle 文件，目录为：

flutter\packages\flutter_tools\gradle\flutter.gradle

找到下面这行代码：

variant.outputs.first().processResources.dependsOn(copyFlutterAssetsTask)

替换为：

def variantOutput = variant.outputs.first()
                def processResources = variantOutput.hasProperty("processResourcesProvider") ?
                    variantOutput.processResourcesProvider.get() : variantOutput.processResources
                processResources.dependsOn(copyFlutterAssetsTask)
                return

OK 了