VerticalSpaceItemDecoration for RecyclerView

VerticalSpaceItemDecoration

import android.graphics.Rect;
import android.support.v7.widget.RecyclerView;
import android.view.View;

public class VerticalSpaceItemDecoration extends RecyclerView.ItemDecoration {
  private final int mVerticalSpaceHeight;

  /**
   * @param mVerticalSpaceHeight height value in dp
   */
  public VerticalSpaceItemDecoration(int mVerticalSpaceHeight) { 
    this.mVerticalSpaceHeight = dp2px(mVerticalSpaceHeight);
  }

  @Override
  public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
      RecyclerView.State state) {
    outRect.bottom = mVerticalSpaceHeight;
  }
  
  private int dp2px(float dp) {
    DisplayMetrics displayMetrics = OAApplication.getInstance().getResources().getDisplayMetrics();
    return Math.round(dp * (displayMetrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT));
  }
}