ActionBarSherlock 4.2 是否支持 SearchView 的搜索建议？

一个月前，我将 ActionBarSherlock 4.2 添加到我的项目中。除了我的搜索建议之外，一切都正常工作了SearchView。我创建搜索建议的方式是使用Android文档中的方法 http://developer.android.com/guide/topics/search/adding-custom-suggestions.html.

ActionBarSherlock 支持搜索建议吗？我试图挖掘问题 https://github.com/JakeWharton/ActionBarSherlock/issues/659列表在 Github 页面上，但问题似乎已经结束，但我似乎无法关注讨论并了解它是否真的已解决。我认为使用过 ActionBarSherlock 的人可能更了解。

事实并非如此。但我找到了一种方法让它查询您的 ContentProvider。 我查看了执行查询的 API 17 中 SuggestionsAdapter 的源代码，并得到了替换此方法的想法。我还发现 ActionbarSherlock 的 SuggestionsAdapter 不使用您的 SearchableInfo。

在 ActionBarSherlock 项目中编辑 com.actionbarsherlock.widget.SuggestionsAdapter：

添加一行

private SearchableInfo searchable;

在构造函数中，添加

this.searchable = mSearchable;

将 getSuggestions 方法替换为以下方法：

public Cursor getSuggestions(String query, int limit) {

    if (searchable == null) {
        return null;
    }

    String authority = searchable.getSuggestAuthority();
    if (authority == null) {
        return null;
    }

    Uri.Builder uriBuilder = new Uri.Builder()
            .scheme(ContentResolver.SCHEME_CONTENT)
            .authority(authority)
            .query("")  // TODO: Remove, workaround for a bug in Uri.writeToParcel()
            .fragment("");  // TODO: Remove, workaround for a bug in Uri.writeToParcel()

    // if content path provided, insert it now
    final String contentPath = searchable.getSuggestPath();
    if (contentPath != null) {
        uriBuilder.appendEncodedPath(contentPath);
    }

    // append standard suggestion query path
    uriBuilder.appendPath(SearchManager.SUGGEST_URI_PATH_QUERY);

    // get the query selection, may be null
    String selection = searchable.getSuggestSelection();
    // inject query, either as selection args or inline
    String[] selArgs = null;
    if (selection != null) {    // use selection if provided
        selArgs = new String[] { query };
    } else {                    // no selection, use REST pattern
        uriBuilder.appendPath(query);
    }

    if (limit > 0) {
        uriBuilder.appendQueryParameter("limit", String.valueOf(limit));
    }

    Uri uri = uriBuilder.build();

    // finally, make the query
    return mContext.getContentResolver().query(uri, null, selection, selArgs, null);
}

现在它查询我的ContentProvider，但默认适配器崩溃，说没有layout_height从支持库加载一些xml文件。所以你必须使用自定义的SuggestionsAdapter。这对我有用：

import com.actionbarsherlock.widget.SearchView;

import android.app.SearchManager;
import android.app.SearchableInfo;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public final class DrugsSearchAdapter extends CursorAdapter
{
    private static final int QUERY_LIMIT = 50;

    private LayoutInflater inflater;
    private SearchView searchView;
    private SearchableInfo searchable;

    public DrugsSearchAdapter(Context context, SearchableInfo info, SearchView searchView)
    {
        super(context, null, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
        this.searchable = info;
        this.searchView = searchView;
        this.inflater = LayoutInflater.from(context);
    }

    @Override
    public void bindView(View v, Context context, Cursor c)
    {
        String name = c.getString(c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1));
        TextView namet = (TextView) v.findViewById(R.id.list_item_drug_name);
        namet.setText(name);

        String man = c.getString(c.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_2));
        TextView manuf = (TextView) v.findViewById(R.id.list_item_drug_manufacturer);
        manuf.setText(man);
    }

    @Override
    public View newView(Context arg0, Cursor arg1, ViewGroup arg2)
    {
        return this.inflater.inflate(R.layout.list_item_drug_search, null);
    }

    /**
     * Use the search suggestions provider to obtain a live cursor.  This will be called
     * in a worker thread, so it's OK if the query is slow (e.g. round trip for suggestions).
     * The results will be processed in the UI thread and changeCursor() will be called.
     */
    @Override
    public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
        String query = (constraint == null) ? "" : constraint.toString();
        /**
         * for in app search we show the progress spinner until the cursor is returned with
         * the results.
         */
        Cursor cursor = null;
        if (searchView.getVisibility() != View.VISIBLE
                || searchView.getWindowVisibility() != View.VISIBLE) {
            return null;
        }
        try {
            cursor = getSuggestions(searchable, query, QUERY_LIMIT);
            // trigger fill window so the spinner stays up until the results are copied over and
            // closer to being ready
            if (cursor != null) {
                cursor.getCount();
                return cursor;
            }
        } catch (RuntimeException e) {
        }
        // If cursor is null or an exception was thrown, stop the spinner and return null.
        // changeCursor doesn't get called if cursor is null
        return null;
    }

    public Cursor getSuggestions(SearchableInfo searchable, String query, int limit) {

        if (searchable == null) {
            return null;
        }

        String authority = searchable.getSuggestAuthority();
        if (authority == null) {
            return null;
        }

        Uri.Builder uriBuilder = new Uri.Builder()
                .scheme(ContentResolver.SCHEME_CONTENT)
                .authority(authority)
                .query("") 
                .fragment(""); 

        // if content path provided, insert it now
        final String contentPath = searchable.getSuggestPath();
        if (contentPath != null) {
            uriBuilder.appendEncodedPath(contentPath);
        }

        // append standard suggestion query path
        uriBuilder.appendPath(SearchManager.SUGGEST_URI_PATH_QUERY);

        // get the query selection, may be null
        String selection = searchable.getSuggestSelection();
        // inject query, either as selection args or inline
        String[] selArgs = null;
        if (selection != null) {    // use selection if provided
            selArgs = new String[] { query };
        } else {                    // no selection, use REST pattern
            uriBuilder.appendPath(query);
        }

        if (limit > 0) {
            uriBuilder.appendQueryParameter("limit", String.valueOf(limit));
        }

        Uri uri = uriBuilder.build();

        // finally, make the query
        return mContext.getContentResolver().query(uri, null, selection, selArgs, null);
    }

}

并在SearchView中设置这个适配器

searchView.setSuggestionsAdapter(new DrugsSearchAdapter(this, searchManager.getSearchableInfo(getComponentName()), searchView));