Error when merging the dex
following are the dependencies.
ext { anko_version='0.10.5' support_lib='1.0.0-alpha1' room_lib = "1.1.0" } dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version" implementation "androidx.cardview:cardview:$support_lib" implementation "com.google.android.material:material:$support_lib" implementation "androidx.appcompat:appcompat:$support_lib" implementation "org.jetbrains.anko:anko:$anko_version" implementation "androidx.lifecycle:lifecycle-extensions:2.0.0-alpha1" implementation "android.arch.persistence.room:runtime:$room_lib" annotationProcessor "android.arch.persistence.room:compiler:$room_lib" }
error
com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: /app/build/intermediates/transforms/dexBuilder/debug/0.jar, Program type already present: android.support.v4.os.ResultReceiver$1
It's because you messed up the dependencies. You have to either fully migrate to AndroidX dependencies or stay on Support library ones. Thus, instead of
implementation "android.arch.persistence.room:runtime:$room_lib" annotationProcessor "android.arch.persistence.room:compiler:$room_lib"
use
implementation "androidx.room:room-runtime:2.0.0-alpha1" annotationProcessor "androidx.room:room-compiler:2.0.0-alpha1"
Also be sure to check your gradle.properties
project file to contain
android.useAndroidX=true android.enableJetifier=true
Jetifier helps libraries, which depend on old Support packages, to use the new AndroidX ones.
What is Jetifier? It's an Android Gradle Plugin task (now can also be used as a standalone tool) which is invoked during build phase. AGP (>= 3.2.0) does automatically apply dependency translation which rewrites bytecode and resources of JAR and AAR dependencies (and transitive dependencies) to reference the new androidx-packaged classes and artifacts. You can also use it as a standalone tool to individually migrate a library.
Jetifier Official Documentation
The standalone Jetifier tool migrates support-library-dependent libraries to rely on the equivalent AndroidX packages instead. The tool lets you migrate an individual library directly, instead of using the Android gradle plugin bundled with Android Studio.
P. S. I didn't test if Anko works with AndroidX dependencies, but if it doesn't even though those properties in your gradle.properties
are enabled, you have no other choices, but fallback to using Support libraries as for now.
add following lines on gradle.properties
android.useAndroidX=true android.enableJetifier=true
and change your room dependencies on build.gradle(moudel:app)
implementation "androidx.room:room-runtime:2.0.0-alpha1" annotationProcessor "androidx.room:room-compiler:2.0.0-alpha1"
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