Error:Program type already present: android.arch.lifecycle.LiveData

Question

When I press the run button in Android Studio, my app compiles but shows this error (redacted):

Error:Program type a         


        

Answer 1

Like Edric mention, this happens because some library still use the old version of android.arch.lifecycle:extensions library, that is android.arch.lifecycle:extensions:1.0.0.

One way to handle this is by forcing the app to use the same version of that library (and if we can, use the newest one).

There are two ways to do that:

1. Explicitly defined the library version that we want to use in our Gradle, under dependencies section.

   implementation 'android.arch.lifecycle:extensions:1.1.1

or

2. Force resolution of the library, also under dependencies section.

   android {
       configurations.all {
           resolutionStrategy.force 'android.arch.lifecycle:extensions:1.1.1'
       }
   }