Unable to merge dex

Question

I have Android Studio Beta. I created a new project with compile my old modules but when I tried launching the app it did not launch with the message:

Error:         


        

Answer 1

In my case issue was because of the room library:

compile 'android.arch.persistence.room:runtime:1.0.0-alpha1'

Changing it to:

compile 'android.arch.persistence.room:runtime:1.0.0'

worked.

Answer 2

add commands below:

android {
...

    dexOptions {

        jumboMode true
        javaMaxHeapSize "4g"

    }
}

Answer 3

One of possible root causes: duplicate transient dependencies that weren't properly handled by Android Studio import of multi-module projects. Check your list and remove them. For me, the fix was literally this:

--- a/project/module/build.gradle
+++ b/project/module/build.gradle
@@ -21,5 +21,4 @@ android {
 dependencies {
     implementation project(':upstream-dependency-project')
     implementation 'com.android.support:support-v4:18.0.0'
-    implementation files('libs/slf4j-android-1.6.1-RC1.jar')
 }

Answer 4

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

dependencies {
  compile 'com.android.support:multidex:1.0.1'
}

Answer 5

If this error appeared for you after including kotlin support, and none of the other solutions work, try changing the kotlin dependency of app module's build.gradle to:

implementation ("org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version") {
    exclude group: 'org.jetbrains', module: 'annotations'
}

This works for me on Android Studio 3.0 Beta 6. See this answer for further explanation.

Answer 6

I also had the problem.

I was able to solve by changing compileSdkVersion and targetSdkVersion to latest version.