Manifest merger failed when using leakcanary 2.0 alpha 2

I am using leakcanary 1.6.3 in my project to find memory-leaks without any problem using:

debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.6.3'

Now I want to update it to leakcanary 2.0 alpha 2 using:

debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.0-alpha-2

But when I try to build project, it gives me manifest merger failed.

ERROR: 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 <application> element at AndroidManifest.xml:10:5-50:19 to override.

How do I fix this error?

Update: I am using android.support libraries in my project.

Solution

After some research in leakcanary 2.0 alpha 2 code, I found that the new version of library uses androidx libraries but I am using android.support libraries in my project. If I refactor my project to use androidx then no error occur.

It seems that:

A project using androidx can use a library that uses android.support
But a project using android.support can not use a library that uses androidx

This SO answer explain androidx and how to migrate your project to androidx.