Firebase version conflicts with support library

manpreet Best Answer 2 years ago

I know this is a common question and I already read several posts and modify many times my gradle file but I can't find the solution.

The error message is: All com.android.support libraries must use the exact same version specification. Found versions 28.0.0, 26.1.0.

But I don't know where the 26.1.0 version is. Any idea how to fix it?

This is my build.gradle(module:app)

  apply plugin: 'com.android.application'
  apply plugin: 'kotlin-android'
  apply plugin: 'kotlin-android-extensions'

  android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.emojify_kotlin"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
  }

  dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    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 'com.google.firebase:firebase-core:16.0.8'
 }

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

And this my project gradle file

buildscript {
ext.kotlin_version = '1.3.21'
repositories {
    google()
    jcenter()

}
dependencies {
    classpath 'com.android.tools.build:gradle:3.3.2'
    classpath 'com.google.gms:google-services:4.2.0'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    // 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}

manpreet 2 years ago

this is error in android studio

try using some very old version or v7 and firebase and than build. once it build fine comeback again to your newer version.

Happy Coding :)