降低SDK API级别-找不到样式

Question

我试图将SDK API级别降低到23，并且Java编译器抱怨此错误消息：

import com.yahoo.prelude.query.CompositeItem;
import com.yahoo.prelude.query.Item;
import com.yahoo.prelude.query.PrefixItem;
import com.yahoo.prelude.query.WordItem;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.search.Searcher;
import com.yahoo.search.query.QueryTree;
import com.yahoo.search.searchchain.Execution;

import java.util.ListIterator;

public class PrefixMatchSearcher extends Searcher {

    @Override
    public Result search(Query query, Execution execution) {
        matchLastByPrefix(query);
        return execution.search(query);
    }

    private boolean matchLastByPrefix(Query query) {
        boolean spaceTerminated = query.getModel().getQueryString().endsWith(" ");
        if (spaceTerminated) return false;

        QueryTree tree = query.getModel().getQueryTree();
        if (tree.getRoot() instanceof WordItem) {
            tree.setRoot(toPrefixItem((WordItem) tree.getRoot()));
            return true;
        }
        else if (tree.getRoot() instanceof CompositeItem) {
            CompositeItem root = (CompositeItem) tree.getRoot();
            for (ListIterator<Item> i = root.getItemIterator(); i.hasNext();) {
                Item child = i.next();
                if (i.hasNext()) continue; // Skip to last

                if (child instanceof WordItem) { 
                    i.set(toPrefixItem((WordItem)child));
                    return true;
                }
            }
        }
        return false;
    }

    private PrefixItem toPrefixItem(WordItem word) {
        return new PrefixItem(word.getWord(), word.getIndexName());
    }

}

编译器未提供文件名或行号。

一个错误的来源可能是Java compiler: (3 errors) error: failed linking references. error: resource android:style/TextAppearance.Material.Widget.Button.Borderless.Colored not found. error: resource android:style/TextAppearance.Material.Widget.Button.Colored not found. 的这一部分（工作室将@android ..标记为红色）：

style.xml

但是删除并不能改变错误。

如何找到此问题的根源？以及如何解决。