我得到的错误：

20:29   Gradle sync failed: Could not find org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.60-eap-25.
            Searched in the following locations:
            https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.60-eap-25/kotlin-stdlib-jdk8-1.3.60-eap-25.pom
            https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.60-eap-25/kotlin-stdlib-jdk8-1.3.60-eap-25.jar
            https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.60-eap-25/kotlin-stdlib-jdk8-1.3.60-eap-25.pom
            https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.60-eap-25/kotlin-stdlib-jdk8-1.3.60-eap-25.jar
            https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.60-eap-25/kotlin-stdlib-jdk8-1.3.60-eap-25.pom
            https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.60-eap-25/kotlin-stdlib-jdk8-1.3.60-eap-25.jar
            Required by:
            unspecified:unspecified:unspecified > com.android.tools.build:gradl... (show balloon)

20:29   NDK Resolution Outcome: Project settings: Gradle model version=4.6,NDK version is UNKNOWN

我安装了NDK

local.properties文件：

sdk.dir = C：\ Users \ Chen Fridman \ AppData \ Local \ Android \ Sdk

ndk.dir = C：\ Users \ Chen Fridman \ AppData \ Local \ Android \ Sdk \ ndk \ 20.1.5948944

build.gradle（项目：android）文件：

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

buildscript {

    repositories {
      mavenCentral()
      google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'
        classpath 'com.google.gms:google-services:4.2.0'

        // 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
}

........................................

build.gradle（应用程序）文件：

 apply plugin: 'com.android.application'
android {
  compileSdkVersion 29
  buildToolsVersion "29.0.2"

  defaultConfig {
    applicationid "io.ionic.simhatzkenti"
    minSdkVersion 15
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

  }
  buildTypes {
    release {
      minifyEnabled false
      proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
    }
  }
}

dependencies {
  compile fileTree(dir: 'libs',include: ['*.jar'])
  androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',{
    exclude group: 'com.android.support',module: 'support-annotations'
  })
  compile 'com.android.support:appcompat-v7:29.+'
  compile 'com.android.support.constraint:constraint-layout:1.0.2'
  testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'


#Tue Jan 30 13:14:22 CST 2018
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

我真的需要帮助，我被困住了！ 非常感谢你！