- Configuration 'compile' is obsolete and has been replaced with 'implementation'
 - Configuration 'androidTestCompile' is obsolete and has been replaced with 'androidTestImplementation'
 - Configuration 'testCompile' is obsolete and has been replaced with 'testImplementation'
 
- Android Studio 3.1.3
 - buildToolsVersion "28.0.0"
 - Compile Target SDK 28 / min SDK 17
 
- Change 'compile' to 'implementation'
 - Change 'androidTestCompile' to 'androidTestImplementation'
 - Change 'testCompile' to 'testImplementation'
 
android {
    compileSdkVersion 27
    buildToolsVersion "27.0.3"
    defaultConfig {
        minSdkVersion 17
        targetSdkVersion 27
...
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-v7:26.+'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
    compile 'org.jsoup:jsoup:+'
    compile 'com.google.android.gms:play-services-ads:11.2.2'
}
After update}
android {
    compileSdkVersion 28
    buildToolsVersion "28.0.0"
    defaultConfig {
        minSdkVersion 17
        targetSdkVersion 28
...
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:appcompat-v7:27.+'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    implementation 'com.google.android.gms:play-services-ads:15.0.1'
} 
You may need to change "Gradle Scripts" -> "build.gradle (Project:[your_project_name])"
buildscript {
    repositories {
        jcenter()
        google() 
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}