Program type already present: android.support.v4.media.MediaBrowserCompat$CustomActionCallback

Question

I completely new to Android Development and can't seem to resolve this error: "Error: Program type already present: android.support.v4.media.MediaBrowserCompat$CustomActionCallback"

This is my dependencies:

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'
implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0-alpha1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0-alpha1'
implementation "android.arch.navigation:navigation-fragment:1.0.0-alpha01"
implementation "android.arch.navigation:navigation-ui:1.0.0-alpha01"


androidTestImplementation 'androidx.test:runner:1.1.0-alpha3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha3'
testImplementation 'junit:junit:4.12'
}

I've googled some and ended up on the developer page about "Resolve duplicate class errors", but I'm still not able to fix this. Help would be very much appriciated!

Answer 1

Option 1

Following worked for me Add the following in your gradle.properties file

android.useAndroidX = true
android.enableJetifier = false

Option 2 (if above does't work)

1. Android studio -> Navigate -> Class
2. Check include non-project classes
3. Copy full class path android.support.v4.accessibilityservice.AccessibilityServiceInfoCompat
4. See where it is used. You may need to remove, one of them.

Option 3 you might be including package which is including modules as well so exclude the support-v4 module with following method

implementation ('org.eclipse.paho:org.eclipse.paho.android.service:1.0.2') {
      exclude group: 'com.android.support', module:'support-v4'
}

You can analyze the conflicting modules using ./gradlew :YOURPROJECT:dependencies from a command line in your project repository. Check especially your third party libraries for occurences of "com.android.support-":

Then exclude the conflicting modules from these dependencies like:

   implementation ("com.jakewharton:butterknife:8.8.1") {
    exclude group: 'com.android.support', module: 'support-v4'
    exclude group: 'com.android.support', module: 'support-annotation'
    exclude group: 'com.android.support', module: 'support-compat'
}

Answer 2

Im using flutter, and Im adding some native libraries in android, I tried the solutions posted here, but the trick for me was android.enableJetifier = true instead false

So, adding the following code to the gradle.properties, my apps are running:

android.useAndroidX = true
android.enableJetifier = true

Answer 3

if you still getting error after

# gradle.properties
android.useAndroidX = true
android.enableJetifier = false

then you probably forgot about main activity that calling android.support.v7.app.AppCompatActivity change it to androidx.appcompat.app.AppCompatActivity