feat: 优化代码

app/src/main/java/io/legado/app/ui/book/arrange/ArrangeBookAdapter.kt

@@ -9,7 +9,9 @@ import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookGroup
 import io.legado.app.help.ItemTouchCallback
+import io.legado.app.lib.theme.backgroundColor
 import kotlinx.android.synthetic.main.item_arrange_book.view.*
+import org.jetbrains.anko.backgroundColor
 import org.jetbrains.anko.sdk27.listeners.onClick
 import java.util.*
 
@@ -56,6 +58,7 @@ class ArrangeBookAdapter(context: Context, val callBack: CallBack) :
 
     override fun convert(holder: ItemViewHolder, item: Book, payloads: MutableList<Any>) {
         with(holder.itemView) {
+            backgroundColor = context.backgroundColor
             tv_name.text = item.name
             tv_author.text = item.author
             tv_author.visibility = if (item.author.isEmpty()) View.GONE else View.VISIBLE