9

我有一个搜索小部件 (SearchView)，在键入时显示自定义建议。我已按照官方指南将最近的查询添加到建议中，但我仍然只有自定义建议。
对于每次搜索，我的片段调用此函数（已验证）：

private void addQueryToRecent(String query) {
    SearchRecentSuggestions suggestions = new SearchRecentSuggestions(getActivity(),
            MyCustomSuggestionProvider.AUTHORITY,
            MyCustomSuggestionProvider.MODE);
    suggestions.saveRecentQuery(query, "recent");
}

我的建议提供者似乎还可以：

public class MyCustomSuggestionProvider extends SearchRecentSuggestionsProvider {

public final static String AUTHORITY = "com.zgui.musicshaker.provider.MyCustomSuggestionProvider";
public final static int MODE = DATABASE_MODE_QUERIES | DATABASE_MODE_2LINES;

public MyCustomSuggestionProvider() {
    setupSuggestions(AUTHORITY, MODE);
}

@Override
public Cursor query(Uri uri, String[] projection, String sel,
        String[] selArgs, String sortOrder) {
    //retrieves a custom suggestion cursor and returns it
}
}

可搜索的.xml：

<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:hint="artist, track informations..."
android:label="@string/app_name"
android:queryAfterZeroResults="true"
android:searchSuggestAuthority="com.zgui.musicshaker.provider.MyCustomSuggestionProvider"
android:searchSuggestSelection=" ?" />

显现 ： 

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>

        <meta-data
            android:name="android.app.searchable"
            android:resource="@xml/searchable" />
    </activity>
<provider
        android:name=".provider.MyCustomSuggestionProvider"
        android:authorities="com.zgui.musicshaker.provider.MyCustomSuggestionProvider"
        android:enabled="true" >
    </provider>

根据那篇文章，我应该在 data/data/app.package.name/databases/databasename.db 有一个最近的搜索数据库，但我似乎没有......
或者我应该添加MyCustomSuggestionProvider.query() 返回的光标中的“最近的搜索建议”？欢迎任何想法......

4

3 回答 3

8

找到它：在 Android 文档上根本不清楚，但我需要自己提出请求并在 MyCustomSuggestionProvider.query() 中合并游标：

Cursor recentCursor = super.query(uri, projection, sel, selArgs,
            sortOrder);
Cursor[] cursors = new Cursor[] { recentCursor, customCursor};
return new MergeCursor(cursors);

确保您在两者中都有相同的列......

于 2012-07-04T15:29:01.540 回答
2 
private static final String[] SEARCH_SUGGEST_COLUMNS = {
        SearchManager.SUGGEST_COLUMN_FORMAT,
        SearchManager.SUGGEST_COLUMN_ICON_1,
        SearchManager.SUGGEST_COLUMN_TEXT_1,
        SearchManager.SUGGEST_COLUMN_INTENT_DATA,
        BaseColumns._ID };

以上是最近搜索建议数据库中使用的列列表，为您的自定义搜索建议使用相同的列表以避免冲突

于 2013-05-11T04:21:43.070 回答
2

为了扩展 elgui 的答案，以下是我如何匹配列的示例：

    @Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
        final Cursor recentsCursor = super.query(uri, projection, selection, selectionArgs, sortOrder);
        final Cursor customResultsCursor = queryCache(recentsCursor, selectionArgs[0]);
        return new MergeCursor(new Cursor[]{recentsCursor, customResultsCursor});
    }

    private Cursor queryCache(Cursor recentsCursor, String userQuery) { 
        final MatrixCursor arrayCursor = new MatrixCursor(recentsCursor.getColumnNames());

        final int formatColumnIndex = recentsCursor.getColumnIndex(SearchManager.SUGGEST_COLUMN_FORMAT);
        final int iconColumnIndex = recentsCursor.getColumnIndex(SearchManager.SUGGEST_COLUMN_ICON_1);
        final int displayColumnIndex = recentsCursor.getColumnIndex(SearchManager.SUGGEST_COLUMN_TEXT_1);
        final int queryColumnIndex = recentsCursor.getColumnIndex(SearchManager.SUGGEST_COLUMN_QUERY);
        final int idIndex = recentsCursor.getColumnIndex("_id");

        final int columnCount = recentsCursor.getColumnCount();

        // Populate data here
        int startId = Integer.MAX_VALUE;

        for (String customSearchResult : customSearchResults) {
            final Object[] newRow = new Object[columnCount];
            if (formatColumnIndex >= 0) newRow[formatColumnIndex] = 0;
            if (iconColumnIndex >= 0) newRow[iconColumnIndex] = R.drawable.invisible;
            if (displayColumnIndex >= 0) newRow[displayColumnIndex] = customSearchResult;
            if (queryColumnIndex >= 0) newRow[queryColumnIndex] = customSearchResult;
            newRow[idIndex] = startId--;
            arrayCursor.addRow(newRow);
        }       

        return arrayCursor;
    }

由于这是基于 SearchRecentSuggestionsProvider 的实现细节，所以在其他情况下它仍然可能失败，编写自己的最近历史记录并一起执行可能更值得。

于 2014-10-17T01:01:54.843 回答