Android Studio 3.0任务执行失败: 无法合并 dex

Android 工作室在执行构建时出现了构建错误，具体如下:

错误: 任务执行失败“ : app: formDexArchiveWithExternalLibsDexMergerForDebug’. java.lang. RuntimeException: java.lang. RuntimeException: com.android.builder.dexing. DexArchiveMergerException: 无法合并 dex”

我的应用程序: build.gradle 文件:

apply plugin: 'com.android.application'


android {
compileSdkVersion 26
buildToolsVersion '26.0.2'
defaultConfig {
applicationId "com.pdroid.foodieschoice"
minSdkVersion 16
targetSdkVersion 25
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.constraint:constraint-layout:1.0.2'
compile 'com.firebaseui:firebase-ui-auth:2.3.0'


testCompile 'junit:junit:4.12'
}
configurations.all {
resolutionStrategy {
force 'com.android.support:appcompat-v7:26.0.1'
force 'com.android.support:support-compat:26.0.1'
force 'com.android.support:support-core-ui:26.0.1'
force 'com.android.support:support-annotations:26.0.1'
force 'com.android.support:recyclerview-v7:26.0.1'
}
}


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

任何解决方案

编辑: 我已经做了样品通过 firebase github 网站和解决

129339 次浏览
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Try to add this in gradle

    android {
defaultConfig {
multiDexEnabled true
}
}
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Simply try doing a "Build -> Clean Project". That solved the problem for me.

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Are you in between SDK or platform updates? If yes complete those completely and then try to continue. I normally update the individual packages that need to be updated as to taking the entire update which could go up to 2.5 GB sometimes. Doing this complete update sometimes fails. I had a number of SDK updates once I upgraded to Android Studio 3.0 and was getting the above error since all packages had not been updated. Once I updated all packages the above error was gone.

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Same thing happened to me, figured out that I was in the middle of updating to AS 3.0.1 and after I did the update, cleaned and rebuilt the app, everything was fixed.

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In my case changing firebase library version from 2.6.0 to 2.4.2 fixed the issue

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For me, the problem was the use of Java 1.8 in a module, but not in the app module. I added this to the app build gradle and worked:

android{
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
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For me, adding 

multiDexEnabled true

and 

packagingOptions {
exclude 'META-INF/NOTICE'
exclude 'META-INF/LICENSE'
exclude 'META-INF/notice'
exclude 'META-INF/notice.txt'
exclude 'META-INF/license'
exclude 'META-INF/license.txt'
}

into the app level Build.gradle file solved the issue

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Same problem. I have enabled multidex: defaultConfig { applicationId "xxx.xxx.xxxx" minSdkVersion 24 targetSdkVersion 26 multiDexEnabled true

I have cleared cache, ran gradle clean, rebuild, make, tried to make sure no conflicts in imported libraries (Removed all transitive dependencies) and made all updates. Still:

Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'. java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

Turns out the build did not like: implementation 'org.slf4j:slf4j-android:1.7.21'

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When the version of Android Studio is 3.0.1, Gradle Version is 4.1 and Android PluginVersion is 3.0.0, it will encounter this problem. Then I downgrade Gradle Version is 3.3, Android Android is zero, there is no such problem.

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This error happens when you add an external library which may not be compatible with your compileSdkVersion .

Be careful when you are adding an external library.

I spent 2 days on this problem and finally it got solved following these steps.

  • Make sure all your support libraries are same as compileSdkVersion of your build.gradle(Module:app) in my case it is 26. enter image description here

  • In your defaultConfig category type multiDexEnabled true. This is the important part. multiDexEnabled True image

  • Go to File | Settings | Build, Execution, Deployment | Instant Run and try to Enable/Disable Instant Run to hot swap... and click okay Enable Instant Run to Hot swap... Image

  • Sync Your project.

  • Lastly, Go to Build | click on Rebuild Project.

  • Note: Rebuild Project first cleans and then builds the project.

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I had this when requested SDK version didn't match the dependencies. You can click the line highlighted and fix this clicking the red light bulb. No need to find the actual version, just let the IDE figure it out for you. And add google repo to maven config.

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I was receiving the same error and in my case, the error was resolved when I fixed a build error which was associated with a different build variant than the one I was currently building.

I was building the build variant I was looking at just fine with no errors, but attempting to debug caused a app:transformDexArchiveWithExternalLibsDexMergerForDebug error. Once I switched to build the other build variant, I caught my error in the build process and fixed it. This seemed to resolve my app:transformDexArchiveWithExternalLibsDexMergerForDebug issue for all build variants.

Note that this error wasn't within the referenced external module but within a distinct source set of a build variant which referenced an external module. Hope that's helpful to someone who may be seeing the same case as me!

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For me what fixed this error was changing one line in my app's gradle dependencies.

from this:

compile('com.google.android.gms:play-services-gcm:+') {
force = true
}

To this:

compile('com.google.android.gms:play-services-gcm:11.8.0') {
force = true
}
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I Have Done and fixed this issue by just doing this jobs in my code

Open ->build.gradle Change value from 

compile 'com.google.code.gson:gson:2.6.1'

to

compile 'com.google.code.gson:gson:2.8.2'
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For Cordova based project, run cordova clean android before build again, as @mkimmet suggested.

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1)Please add multiDexEnabled true
2)if you get compilation error then check your app level build.gradle weather same dependencies are implemented with different versions.
3)Remove one if you find same dependencies.

android { compileSdkVersion 28 defaultConfig {

    minSdkVersion 17
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}

hope it works fine :) Happy Coding
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Also be sure your app is subclassing MultiDexApplication

import android.support.multidex.MultiDexApplication


class App : MultiDexApplication()

or if not subclassing Application class, add to AndroidManifest.xml

<application
android:name="android.support.multidex.MultiDexApplication"
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Use multiDexEnabled true as below.

{
minSdkVersion 17
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}

and 

implementation 'com.android.support:multidex:1.0.3'

this Solution worked for me.

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The easiest way to avoid suck kind of error is:

-Change library combilesdkversion as same as your app compilesdkversion

-Change library's supportLibrary version as same as your build.gradle(app)

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Resolution:

Refer to this link: As there are various options to shut the warning off depending on the minSdkVersion, it is set below 20:

 android {
defaultConfig {
...
minSdkVersion 15
targetSdkVersion 26
multiDexEnabled true
}
... }


dependencies {   compile 'com.android.support:multidex:1.0.3' }

If you have a minSdkVersion greater than 20 in your build.gradle set use the following to shut down the warning:

  android {
defaultConfig {
...
minSdkVersion 21
targetSdkVersion 26
multiDexEnabled true
}
... }

Update dependencies as follows: 

     dependencies {
implementation 'com.android.support:multidex:1.0.3'
}

Again the only difference is the keywords in dependencies:

minSdkVersion below 20: use compile

minSdkVersion above 20: use implementation

  1. I hope this was helpful, please upvote if it solved your issue, Thank you for your time.
  2. Also for more info, on why this occurs, please read the first paragraph in the link, it will explain thoroughly why? and what does this warning mean.
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I tried many solutions as mentioned above including the multiDexEnabled true but none of that worked for me.

Here is the solution which worked for me - copy this code in app\build.gradle file

configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == 'com.android.support' && requested.name != 'multidex') {
details.useVersion "${rootProject.ext.supportLibVersion}"
}
}
}

Make sure to run gradlew clean before running the code

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This is what works for me. clean prepare and run. 

cordova clean android;
ionic cordova prepare andriod;
ionic cordova run andriod;

hope it helps.

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Go to your module level build.gradle file and add the following lines to the code

    defaultConfig {
...
minSdkVersion 15
targetSdkVersion 28
multiDexEnabled true
}
...
}


dependencies {
implementation 'com.android.support:multidex:1.0.3'
}

That solved the problem easily. Check this documentation

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I also got the similar error.

Problem :

enter image description here

Solution :

Main root cause for this issue ismultiDex is not enabled. So in the Project/android/app/build.gradle, enable the multiDex

For further information refer the documentation: https://developer.android.com/studio/build/multidex#mdex-gradle

enter image description here


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