content: package com.wm.remusic.uitl;
  
  import android.support.annotation.NonNull;
  import android.support.annotation.Nullable;
  import android.support.v7.widget.RecyclerView;
  
  public class NoAlphaItemAnimator extends RecyclerView.ItemAnimator {
  
      @Override
      public boolean animateDisappearance(@NonNull RecyclerView.ViewHolder viewHolder, @NonNull ItemHolderInfo preLayoutInfo, @Nullable ItemHolderInfo postLayoutInfo) {
          return false;
      }
  
      @Override
      public boolean animateAppearance(@NonNull RecyclerView.ViewHolder viewHolder, @Nullable ItemHolderInfo preLayoutInfo, @NonNull ItemHolderInfo postLayoutInfo) {
          return false;
      }
  
      @Override
      public boolean animatePersistence(@NonNull RecyclerView.ViewHolder viewHolder, @NonNull ItemHolderInfo preLayoutInfo, @NonNull ItemHolderInfo postLayoutInfo) {
          return false;
      }
  
      @Override
      public boolean animateChange(@NonNull RecyclerView.ViewHolder oldHolder, @NonNull RecyclerView.ViewHolder newHolder, @NonNull ItemHolderInfo preLayoutInfo, @NonNull ItemHolderInfo postLayoutInfo) {
          return false;
      }
  
      @Override
      public void runPendingAnimations() {
  
      }
  
      @Override
      public void endAnimation(RecyclerView.ViewHolder item) {
  
      }
  
      @Override
      public void endAnimations() {
  
      }
  
      @Override
      public boolean isRunning() {
          return false;
      }
  }