Android Studio TransformException : Error:Execution failed for task ':app:transformClassesWithDexForDebug'

Question

I am getting the exception below when I am trying to run the application using Android Studio:

Error:Execution failed for task \':app:transformClasses

Answer 1

Modify the module-level build.gradle file

 android {
    ...

    // Enabling multidex support.
    multiDexEnabled true
}
...

}

add dependencies compile 'com.android.support:multidex:1.0.0'

In your manifest add the MultiDexApplication class

<manifest ...>
<application
    ...
    android:name="android.support.multidex.MultiDexApplication">
    ...
</application>

http://developer.android.com/studio/build/multidex.html

Answer 2

in my case using android studio 2.0 preview 4 I suddenly got that problem and adding multiDexEnabled true didn't help, and also clean and rebuilt didn't help.

so the only thing that solved it for me is deleting that file:

YOUR_APP_NAME\app\build\intermediates

and run the application and it works.

Answer 3

I have same issue, after few hour research, i found a solution to fix it.

You should fixed build.gradle :

android {

    compileSdkVersion ..
    buildToolsVersion '...'

    defaultConfig {
       ...
       targetSdkVersion ..
       multiDexEnabled true  // this line will solve this problem
   }
}

If the number of method references in your app exceeds the 65K limit, your app may fail to compile.

For information on how to do this, see Selectively compiling APIs into your executable and Building Apps with Over 65K Methods

Answer 4

In my case I was going back and forth between Expo and Android Studio for react native. Expo wanted one application name in order to build and Android Studio wanted another, once I put it back to the name that android studio wanted it built and deployed fine.

Expo

AppRegistry.registerComponent('main', () => App);

Android Studio

AppRegistry.registerComponent('AwesomeProject', () => App);

Answer 5

Add the following line:

multiDexEnabled true

Inside the defaultConfig of build.gradle

Like this:

defaultConfig{
    multiDexEnabled true
}

Answer 6

I found the answer from here: After change the build.grade file with the following

minSdkVersion 21

targetSdkVersion 25

multiDexEnabled true

works fine.