我的应用build. gradle文件

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.marcus.exceltest"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:design:28.0.0'
    implementation 'org.apache.poi:poi:4.1.1'
    implementation 'org.apache.poi:poiooxml:4.1.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'androidx.legacy:legacy-support-v13:1.0.0'
}

我的Gradle build. gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.2'
        implementation 'androidx.appcompat:appcompat:1.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

我Gradle.properties

# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
org.gradle.jvmargs=-Xmx1536m
android.useAndroidX=true
android.enableJetifier=true
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true

错误：

错误：找不到GradleDSL方法：“实现（）”可能的原因：项目“Exceltest”可能正在使用不包含该方法的Android Gradle插件版本（例如，在1.1.0中添加了“testCompile”）。将插件升级到版本3.5.2并同步项目

项目“Exceltest”可能正在使用不包含该方法的Gradle版本。打开Gradle包装文件

构建文件可能缺少Gradle插件。应用Gradle插件

事件日志：18:27 Gradle同步失败：找不到org.gradle.api.内部.artifacts.dsl.依赖项.DefaultDependencyHandler类型对象上参数[androidx.appcompat：appcompat：1.1.0]的方法实现（）。（950毫秒）

18:27 NDK分辨率结果：项目设置：Gradle模型版本=5.4.1，NDK版本未知

18:28运行“Exceltest”时出错：Gradle项目同步失败。请修复您的项目并重试。

在我升级到Android Studio v3.5.2之前，一切都正常，尝试了AS提供的所有建议，但我很难尝试手动更新，包括gradle升级和工具升级。我对AS很陌生，我看过以前的答案，但它们与更旧的版本有关，或者我的版本中不存在文件系统。请有人帮忙吗？