gradle - 'AllDevelopmentDebugClassesForMultiDex'. > java.util.zip.ZipException: duplicate entry: retrofit/android/AndroidApacheClient.class -

my build.gradle:

apply plugin: 'com.android.application' apply plugin: 'io.fabric'  buildscript { repositories      maven { url 'https://maven.fabric.io/public' } }  dependencies {     classpath 'io.fabric.tools:gradle:1.+' } }  android { compilesdkversion 22 buildtoolsversion "23.0.1"  defaultconfig {     applicationid "com.myapp"     minsdkversion 19     targetsdkversion 22     versioncode 1     versionname "1.0"     multidexenabled true }  productflavors {     production {         applicationid "com.myapp"     }      development {         applicationid "com.myapp.development"     }      staging {         applicationid "com.myapp.staging"     }      qa {         applicationid "com.myapp.qa"     } }  buildtypes {     release {         minifyenabled false         proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'     } } sourcesets {     main {         res.srcdirs = ['src/main/res', 'src/main/res/drawable', 'src/main/res/views/activities', 'src/main/res/anim']     } } }  repositories { mavencentral() maven { url 'https://maven.fabric.io/public' } }  dependencies { compile filetree(dir: 'libs', include: ['*.jar']) testcompile 'junit:junit:4.12' compile project(':facebook') compile 'com.android.support:appcompat-v7:22.2.0' compile 'com.squareup.picasso:picasso:2.5.2' compile files('libs/gson-2.3.1.jar') compile files('libs/retrofit-1.9.0.jar') compile('com.digits.sdk.android:digits:1.8.0@aar') {     transitive = true; } } 

i have tried enabling multidex, no fabric support forums too.

also tried excluding gson module digits

compile('com.digits.sdk.android:digits:1.8.0@aar') {     transitive = true;     exclude module: 'gson'; } 

ps: want use phone number verification/signin feature, no twitter sign-in feature required. using retrofit , picasso.

your conflict on retrofit, not gson.

change exclude module: 'gson' exclude module: 'retrofit' in digits dependency.