Manifest Merger Fails for Appcomponentfactory

Manifest merger failed : Attribute application@appComponentFactory - Androidx

After hours of struggling, I solved it by including the following within app/build.gradle:

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

Put these flags in your gradle.properties

android.enableJetifier=true
android.useAndroidX=true

Changes in build.gradle:

implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'com.google.android.material:material:1.1.0-alpha04'

Refer to: https://developer.android.com/jetpack/androidx/migrate

ERROR: Manifest merger failed : Attribute application@appComponentFactory

Find a solution by adding googlePlayServicesVersion = "16.+" to app/build.gradle, since Google Services has been updated :

buildscript {
    ext {
        ...
        googlePlayServicesVersion = "16.+"
    }
    ...
}

Manifest merger failed : Attribute application@appComponentFactory cant solve this

You are using

implementation 'com.google.firebase:firebase-messaging:19.0.1'

Firebase migrated to AndroidX in the latest release.
It means that you are using both, support libraries and androidx libraries.

You can:

• migrate to androidx as described below
• downgrade your firebase dependencies (but it is not a real solution because you have to migrate sooner or later)

You can check the official release notes:

Warning: This release is a MAJOR version update and breaking change.
The latest update to Google Play services and Firebase includes the following changes:

Migration from Android Support Libraries to Jetpack (AndroidX) Libraries. Libraries will not work unless you make the following changes in your app:

• Upgrade com.android.tools.build:gradle to v3.2.1 or later.
• Upgrade compileSdkVersion to 28 or later.
• Update your app to use Jetpack (AndroidX); follow the instructions in Migrating to AndroidX.

After defining ButterKnife , Manifest merger failed : Attribute application@appComponentFactory error

You cannot use butterknife:10.x.x unless you also migrated to AndroidX. If you haven't migrated, you'll need to stick to 9.0.0 for now. Once you migrate, then you can update to 10.1.0 (or whatever is latest at that time). –

Manifest merger failed : Attribute application@appComponentFactory after add Exoplayer 2.10.5

Manifest merger failed : Attribute application@appComponentFactory
value=(android.support.v4.app.CoreComponentFactory) from
[com.android.support:support-compat:28.0.0]
AndroidManifest.xml:22:18-91
is also present at [androidx.core:core:1.0.1] AndroidManifest.xml:22:18-86
value=(androidx.core.app.CoreComponentFactory).
Suggestion: add 'tools:replace="android:appComponentFactory"' to element at AndroidManifest.xml:25:5-171:19 to override.

My Suggestion is - Move to AndroidX. You can migrate an existing project to AndroidX by selecting Refactor > Migrate to AndroidX from the menu bar.

Upgrade to

 classpath 'com.android.tools.build:gradle:3.6.1'//3.6.3

Your dependencies will

 implementation 'androidx.appcompat:appcompat:1.1.0'
 implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 implementation 'androidx.legacy:legacy-support-v4:1.0.0'

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