Question

我有一个搜索小部件（SearchView），在输入时显示自定义建议。我已按照official guide添加了最近的建议查询，但我仍然只提供自定义建议对于每次搜索，我的片段都会调用此函数（已验证）：

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

我的建议提供商似乎没问题：

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
}
}

searchable.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=" ?" />

清单：

            <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that post，我应该在data / data / app.package.name / databases / databasename.db上有一个最近的搜索数据库，但我似乎没有...
或者我应该在MyCustomSuggestionProvider.query（）返回的游标中添加“最近的搜索建议”？任何想法都是受欢迎的......

Answer 1

找到它：在Android文档中根本不清楚，但我需要自己发出请求并在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);

确保两者都有相同的列......

Answer 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，使用相同列表进行自定义搜索建议以避免冲突

Answer 3

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，它在其他情况下仍然可能失败，因此编写自己的最近历史并一起完成它们可能更有价值。

最近的搜索未显示，自定义建议

3 个答案: