Notifyitemchanged flash back

In the use of notifyItemChanged() to update Appoint item when Flash back
The mistakes were reported as follows ：

java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/animation/AnimatorCompatHelper;

The simple method is to set
mRecyclerView.setItemAnimator(null); Can solve

Later, I checked the data and found that
It's because of my android support There is a problem with the package version
The root cause is gradle Declarative RecycleView The way is ：

implementation 'com.android.support:recyclerview-v7:24.2.1'

And in the previous definition AppCompat Statement of

implementation 'com.android.support:appcompat-v7:27.1.1'

RecycleView stay support24.2.1 Required in AnimatorCompatHe, and gradle grabbing support The version of the library depends on the previous AppCompat The definition of 27.1.1 edition , This version will AnimatorCompatHe Library removed , This will result in operation RecycleView Time report NoClassDefFoundError Error of , The modification method is to RecycleView hinder support The library version is changed to 27.1.1 again sync gradle No error will be reported after compilation .