CODEWITHSUNDEEP
androidiosflutter
N Sharma
N Sharma

Reputation: 34507

Unable to merge dex in flutter

Hi I am developing app in flutter. When I am trying to build flutter then I am getting an error Unable to merge dex.

app build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 27

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.xyz"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'com.google.firebase:firebase-core:16.0.0'
}

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

module build.gradle

buildscript {
    ext.kotlin_version = '1.1.51'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.0.0'
    }
}

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

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

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

Does anyone know how to resolve it in flutter ?

Upvotes: 0

Views: 667

Answers (3)

Casey Schneider
Casey Schneider

Reputation: 1002

Following this link solved a very similar issue for me.

** I did not not have to set multiDexEnabled to true

First I set dependencies in my pubspec.yaml to

dependencies:
  flutter:
    sdk: flutter
  cloud_firestore: ^0.8.2

and ran flutter packages get in my IDE's terminal.

Also I had to change the minimum target SDK version:

  1. Open android/app/build.gradle, then find the line that says minSdkVersion 16.
  2. Change that line to minSdkVersion 21.
  3. Save the file.

This alone may fix your problem; however I had to also do the following because some of my dependency versions were mismatched.

I had to open android/app/build.gradle, then add the following line as the last line in the file: apply plugin: 'com.google.gms.google-services'

Next, I had to open android/build.gradle, then inside the buildscript tag, add a new dependency:

buildscript {
   repositories {
       // ...
   }

   dependencies {
       // ...
       classpath 'com.google.gms:google-services:3.2.1'   // new
   }
}

After this my app finally ran on the android emulator.

The link has a more complete walkthrough if you get stuck.

Upvotes: 0

khairy Mohamed
khairy Mohamed

Reputation: 176

take this steps :

  1. clean the project by running flutter clean
  2. rebuild using flutter build or run using flutter run.

i hope this will help .

Upvotes: 0

Vns Aditya
Vns Aditya

Reputation: 445

Try adding this in app build.gradle

android {
defaultConfig {
   multiDexEnabled true
 }
}

change 

classpath 'com.google.gms:google-services:4.0.0' 
implementation 'com.google.firebase:firebase-core:16.0.0'

to 

classpath 'com.google.gms:google-services:4.0.1'
implementation 'com.google.firebase:firebase-core:16.0.1'

And also open the project in Android studio and clean, rebuild or simply run flutter clean command

Upvotes: 4

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