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cvc-complex-type.2.4.a: 发现了以元素 ‘base-extension‘ 开头的无效内容。应以 ‘{layoutlib}‘ 之一开头
MoreSolution:
1,project级别build.gradle中修改 classpath "com.android.tools.build:gradle:3.5.4"
2,gradle-wrapper.properties修改 distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-bin.zip