ActionBarSherlock 4.2是否支持SearchView的搜索建議？

Question

一個月前，我將ActionBarSherlock 4.2放入我的項目中。 我得到了一切工作，除了我的SearchView的搜索建議。 我創建搜索建議的方式是使用Android文檔中的方法 。

ActionBarSherlock是否支持搜索建議？ 我試圖在Github頁面上挖掘問題列表，但問題似乎已經關閉但我似乎無法跟進討論並理解它是否真的已經解決了。 我以為你們中的一些人一直在使用ActionBarSherlock可能會更清楚。

Answer 1

它沒有。 但我找到了一種方法來讓它查詢你的ContentProvider。 我查看了API 17中的SuggestionsAdapter源代碼，其中查詢執行並得到了替換此方法的想法。 另外我發現ActionbarSherlock的SuggestionsAdapter不使用你的SearchableInfo。

編輯ActionBarSherlock項目中的com.actionbarsherlock.widget.SuggestionsAdapter：

添加一行

private SearchableInfo searchable;

在構造函數中，添加

this.searchable = mSearchable;

用以下方法替換getSuggestions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);
}

現在它查詢我的ContentProvider，但崩潰了默認適配器，說沒有layout_height從支持庫加載一些xml文件。 所以你必須使用自定義SuggestionsAdapter。 這對我有用：

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);
    }

}

並在SearchView中設置此適配器

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

Answer 2

我是那個打開github問題的人。 它正在開發分支。 當前版本（4.2）沒有修復。 它通過此提交完全修復，但我建議只檢查dev分支並嘗試它。

Answer 3

我不知道我在這里是不是錯了，或者我在事故中改變了一些東西，但上面的答案不起作用，ActionBarSherlock SuggestionsAdapter不起作用。 我得到的只是runQueryOnBackgroundThread中的空指針。 它也從未進入bindView等，但它設法顯示建議結果。 我認為android.app.SearchManager以某種方式用getSuggestions（）覆蓋ABS，但我不確定。 我還在嘗試......