There's this library I created to report exceptions via email. It works well with the Android Java project but fails with Android Kotlin. When I add the compile script for the libary (compile 'com.theah64.bugmailer:bugmailer:1.1.9')
and tries to build the APK, am getting below error.
Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
> com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex
This is my app's build.gradle file
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 27
defaultConfig {
applicationId "com.theapache64.calculator"
minSdkVersion 15
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled false
multiDexEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dexOptions {
preDexLibraries = false
javaMaxHeapSize "4g"
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
implementation 'com.android.support:appcompat-v7:27.0.2'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:design:27.0.2'
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'
compile 'com.theah64.bugmailer:bugmailer:1.2.0'
}
I've googled a lot and tried the multiDexEnabled
solution. but it doesn't work.
Answer
The problem you are having is caused by conflicting dependencies, 2 of your dependencies are defining the same classes. If you try to compile with
./gradlew --stacktrace app:assembleDebug
You would see this error
Caused by: com.android.dex.DexException: Multiple dex files define Lorg/intellij/lang/annotations/MagicConstant;
Now, you can analyze all the dependency trees with
./gradlew app:dependencies
And see these (simplified here):
+--- com.theah64.bugmailer:bugmailer:1.2.0
| +--- org.jetbrains:annotations-java5:15.0
and
+--- org.jetbrains.kotlin:kotlin-stdlib:1.2.30
| \--- org.jetbrains:annotations:13.0
So, both Kotlin std lib and bugmailer are using org.jetbrains annotation, but from 2 different modules. This causes a problem because the same class (MagicConstant in that case) is being defined twice, I think that the duplicate entries would be even more.
The solution would be to exclude one of the 2 transitive dependencies, for instance
compile('com.theah64.bugmailer:bugmailer:1.2.0') {
exclude group: 'org.jetbrains', module: 'annotations-java5'
}
You will be able to compile the app, but, keep in mind that this solution is based on the assumption that bugmailer will work just fine with org.jetbrains:annotations:13.0
instead of org.jetbrains:annotations-java5:15.0
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