Flutter MainActivity is defined multiple times error after upgrade [duplicate] - flutter

Question

I'm using Android Studio for the first time and I got the following error after importing the project (previously it was an eclipse project where I had issues too.)
Here is the information given:
Error:Execution failed for task ':app:dexDebug'.
> com.android.ide.common.internal.LoggedErrorException: Failed to run command:
/home/crash-id/Development/SDK/adt-bundle-linux-x86_64-20140702/sdk/build-tools/21.1.2/dx --dex --no-optimize --output /home/crash-id/AndroidstudioProjects/LocalSin/app/build/intermediates/dex/debug --input-list=/home/crash-id/AndroidstudioProjects/LocalSin/app/build/intermediates/tmp/dex/debug/inputList.txt
Error Code:
2
Output:
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Lcom/google/ads/AdRequest$ErrorCode;
at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.Main.main(Main.java:106)
:app:dexDebug
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Lcom/google/ads/AdRequest$ErrorCode;
at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.Main.main(Main.java:106)
FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:dexDebug'.
> com.android.ide.common.internal.LoggedErrorException: Failed to run command:
/home/crash-id/Development/SDK/adt-bundle-linux-x86_64-20140702/sdk/build-tools/21.1.2/dx --dex --no-optimize --output /home/crash-id/AndroidstudioProjects/LocalSin/app/build/intermediates/dex/debug --input-list=/home/crash-id/AndroidstudioProjects/LocalSin/app/build/intermediates/tmp/dex/debug/inputList.txt
Error Code:
2
Output:
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Lcom/google/ads/AdRequest$ErrorCode;
at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.Main.main(Main.java:106)
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
The app build.gradle is this:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.myapp.test"
minSdkVersion 11
targetSdkVersion 14
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}
dependencies {
compile 'com.android.support:support-v4:18.0.0'
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.google.android.gms:play-services:+'
compile files('libs/google-play-services.jar')
compile files('libs/httpcore-4.3.2.jar')
compile files('libs/httpmime-4.3.4.jar')
}
And the project built.gradle is this:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.0.0'
}
}
allprojects {
repositories {
jcenter()
}
}
Do you have any idea what the problem could be and how can it be solved? A good explanation for the problem would be useful too as I am new to Android Studio. Thanks in advance :)

Answer 1

compile 'com.google.android.gms:play-services:+'
compile files('libs/google-play-services.jar')
I think you should remove 1 of those lines.

Answer 2

cd android/ && ./gradlew clean && cd .. && react-native run-android

Answer 3

I had the Android Studio Error:Execution failed for task ':app:dexDebug' that i solve it by setting multiDexEnabled to true
defaultConfig {
// Enabling multidex support.
multiDexEnabled true
}
Too many library were used in my project so i exceed the 65K methods dex limit imposed by Android for more information see : http://developer.android.com/tools/building/multidex.html

Answer 4

This happens because you are duplicating the library dependency inside of app build.gradle in android studio.
Android Studio automatically adds the dependencies for all the files in the libs folder by using
compile fileTree(dir: 'libs', include: ['*.jar'])
or in your specific case the dependency is added using
compile files('libs/google-play-services.jar')
^ Now when you try to add the dependency again by using
compile 'com.google.android.gms:play-services:+'
you get the error.
SOLUTION
Remove all duplicate dependencies added inside the "app build.gradle" and you should be good to go.In your case remove
compile 'com.google.android.gms:play-services:+'

Answer 5

avoid to include whole gms library:
compile 'com.google.android.gms:play-services:+'
Instead, just use required components in this way:
compile 'com.google.android.gms:play-services-ads:8.3.0'
compile 'com.google.android.gms:play-services-analytics:8.3.0'
compile 'com.google.android.gms:play-services-gcm:8.3.0'

Answer 6

Ensure that the Package names are not duplicated across the projects being compiled
In #Drivers' answer, it is pointed out that in a given project, there should not be multiple dependencies that have the same namespace. In the case above, the Google Play Services library had been included twice, and thus caused a package name conflict.
The same can also happen across multiple modules (apps, libraries etc.) in the same project. So, ensure that for each AndroidManifest.xml file, the package name is unique across all modules:-
AndroidManifest.xml:
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="this.must.be.unique.across.modules">

Answer 7

I had the below code on gradle file and same error.
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'com.google.android.gms:play-services-ads:8.3.0'
}
dependencies {
compile 'com.android.support:design:23.+'
}
dependencies {
compile 'com.android.support:design:23.+'
}
dependencies {
compile 'com.android.support:design:23.+'
}
Removed those last 3 dependencies and now its working!

Answer 8

delete all files in c:\users\<username>\.gradle\caches\transforms-2\files-2.1\
Enjoy the command flutter run