Android X: tools:replace specified at line: for attribute, but no new value specified

Question

I have tried many solutions on this website but still, the problem is not solved. The issue is due to Android X library. When I added Android X, this issue was resolved but

Answer 1

I think you are migrating to AndroidX libs.

Add below lines to gradle.properties file

android.useAndroidX=true
android.enableJetifier=true

Remove tools:replace="android:appComponentFactory" from manifest.

Replace android.support.v7.app.AppCompatActivity to androidx.appcompat.app.AppCompatActivity

Migrating to AndroidX

Answer 2

migrate to android x

add below lines inside tag

    tools:replace="android:appComponentFactory"
    android:appComponentFactory="android.support.v4.app.CoreComponentFactory"

then also add below lines inside gradle.properties file

  android.useAndroidX=true
  android.enableJetifier=true

Rebuild your project.

Answer 3

I got same error in my project, I have resolved it You can try it

Android Studio > Refactor > Migrate to AndroidX

Answer 4

You can try adding:

android:appComponentFactory="android.support.v4.app.CoreComponentFactory"

To the tag <application > in your manifest.

Answer 5

In my case, i was facing problem because of the firebase version i was using. Downgrading the firebase version helped me.

implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1' implementation 'com.google.firebase:firebase-core:16.0.6'

Answer 6

In my case, I had updated Firebase and play services dependency, result in this issue.

Reverted back the dependency updates and the error vanished

Seems that the latest Firebase and Play Service dependencies are compatible with androidx.