Gradle DSL method not found: 'implementation()'

I had this error

Error:(45, 0) Gradle DSL method not found: 'implementation()'
Possible causes:<ul><li>The project 'LaTaxi2' may be using a version of the Android Gradle plug-in that does not contain the method (e.g. 'testCompile' was added in 1.1.0).
<a href="fixGradleElements">Upgrade plugin to version 2.3.3 and sync project</a></li><li>The project 'LaTaxi2' may be using a version of Gradle that does not contain the method.
<a href="open.wrapper.file">Open Gradle wrapper file</a></li><li>The build file may be missing a Gradle plugin.
<a href="apply.gradle.plugin">Apply Gradle plugin</a></li>

build.gradle content

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


buildscript {
    repositories {
        maven {
            url 'https://maven.google.com'
        }
//        google()
        jcenter()
        maven { url 'https://maven.fabric.io/public' }
    }
    dependencies {
        /* CHANGE to classpath 'com.android.tools.build:gradle:2.3.3'  for STABLE BUILD TOOL VERSION*/
//        classpath 'com.android.tools.build:gradle:3.0.0-alpha7'
        classpath 'com.android.tools.build:gradle:2.3.3'
        classpath 'com.google.gms:google-services:3.1.0'
        // We recommend changing it to the latest version from our changelog:
        // https://docs.fabric.io/android/changelog.html#fabric-gradle-plugin

        classpath 'io.fabric.tools:gradle:1+'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}


allprojects {
    repositories {
        maven {
            url 'https://maven.google.com'
        }
//        google()
        jcenter()
    }
}

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

build .gradle module app

apply plugin: 'com.android.application'

apply plugin: 'io.fabric'

repositories {
    maven {
        url 'https://maven.google.com'
    }
//    google()
    maven { url 'https://maven.fabric.io/public' }
}

android {
    compileSdkVersion 25
    buildToolsVersion '26.0.0'
    defaultConfig {
        applicationId "in.techware.lataxi"
        minSdkVersion 17
        targetSdkVersion 25
        versionCode 5
        versionName "1.0.4"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    /* Remove This to remove Crashlytics and Fabric */

    compile('com.crashlytics.sdk.android:crashlytics:2.6.7@aar') {
        transitive = true;
    }
/*    compile('com.digits.sdk.android:digits:2.0.6@aar') {
        transitive = true;
    }*/
    implementation 'com.android.support:appcompat-v7:25.4.0'
    implementation 'com.android.support:design:25.4.0'
    implementation 'com.android.support:recyclerview-v7:25.4.0'
    implementation 'com.squareup.okhttp3:okhttp:3.8.1'
    implementation 'com.android.support:cardview-v7:25.4.0'
    implementation 'com.github.bumptech.glide:glide:3.8.0'
    implementation 'com.google.android.gms:play-services-maps:11.0.2'
    implementation 'com.google.android.gms:play-services-location:11.0.2'
    implementation 'com.google.android.gms:play-services-places:11.0.2'
    implementation 'com.google.firebase:firebase-auth:11.0.2'
    implementation 'com.google.firebase:firebase-messaging:11.0.2'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0-beta1'
    implementation 'com.google.code.gson:gson:2.8.0'
    testCompile 'junit:junit:4.12'
}







apply plugin: 'com.google.gms.google-services'

I had such a simple reason for this not working that I must post my answer to prevent anybody else going through this.

Don't put repositories and dependencies in the file called build.gradle (Project: YourProjectName)! There is a comment in that file that says:

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

Good job to whoever put that note in there. Instead, place your repositories and dependencies in the similarly named module file build.gradle (Module: app).

There should already be a dependencies function. You may need to add repositories function. In my case, it was:

repositories {
    maven { url "https://jitpack.io" }
}

This should let you sync and recognize implementation.

To use the DSL implementation() you have to use:

• The updated gradle plugin for Android 3.0.0
• The gradle version 3.4 or later

Then in your build.gradle you have to use:

buildscript {
    repositories {
        ...
        // You need to add the following repository to download the
        // new plugin.
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0-beta1'
    }
}

In your gradle-wrapper.properties

distributionUrl=\
  https\://services.gradle.org/distributions/gradle-4.1-rc-1-all.zip

More detailed info here.

or if you don't want to update to the latest Gradle, go back to using DSL method compile() instead of implementation()