Android Material and appcompat Manifest merger fai

Question

I have next grade

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.google.android.material:material:1.0.0-rc01'
}

But when I want to build app I get next log:

Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0-alpha3] AndroidManifest.xml:22:18-91
    is also present at [androidx.core:core:1.0.0-alpha3] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
    Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:5-19:19 to override.

Okey! Go to manifest and do it:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="ru.chopcode.myapplication">

    <application
        tools:replace="android:appComponentFactory"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
    </application>

</manifest>

Then I get this error in my Logcat:

Manifest merger failed with multiple errors, see logs that I have Linked with it

Answer 1

Just remove the android.support dependancy

    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'

Quoting From Material Guidelines

If you don’t want to switch over to the new androidx and com.google.android.material packages yet, you can use Material Components via the com.android.support:design:28.0.0-alpha3 dependency.

Note: You should not use the com.android.support and com.google.android.dependencies in your app at the same time.

Just removing this dependency works fine

    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'

Here is complete dependencies example

    dependencies {
       implementation fileTree(dir: 'libs', include: ['*.jar'])
       implementation 'com.google.android.material:material:1.0.0-beta01'
       implementation 'com.android.support.constraint:constraint-layout:1.1.2'
       testImplementation 'junit:junit:4.12'
       androidTestImplementation 'com.android.support.test:runner:1.0.2'
       androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
   }

Answer 2

This issue mainly happened for old dependencies.

There have 2 solution:

First one:

Update all old dependencies and ClassPaths from Project level gradle files.

classpath 'com.android.tools.build:gradle:3.3.1'
classpath 'com.google.gms:google-services:4.2.0'

Second one:

Your project Migrate to AndroidX

From Android Studio Menu -> Refanctor -> Migrate to AndroidX

Thanks, let me know if anyone help from this answer.

Answer 3

Change proguardFile in build.gradle (Module: app) to the following

proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

instead of

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

This worked for me

Answer 4

I had this same problem for three days.

It is like android wants us to either use Kotlin Or AndroidX, they are doing away with Android.

But this is how I solved it.

• I migrated my project to AndroidX. This does not bring in any errors related to this issue in question, It updates files respectively. No method, class or variable name needs to be changed in your application.

NB: You must be using the latest Libraries (build.grudle file) in the latest stable version of android studio 3.4.1

Answer 5

I had similar problem. Added two lines in gradle.properties file:

android.useAndroidX=true
android.enableJetifier=true

These two lines automatically resolved my dependency conflicts between google's files and third party dependencies. Here's the link to follow: https://developer.android.com/topic/libraries/support-library/androidx-overview#new-project

Answer 6

just add these two lines of code to your Manifest file

tools:replace="android:appComponentFactory"
android:appComponentFactory="whateverString"