Java 为什么Android上使用加载程序和fts3表的listview是空的？

基本上，我的listview使用游标加载程序加载数据，在正常的表中显示良好，但一旦我将表转换为fts3（使用MATCH进行搜索），它就停止显示数据

表格声明：

 public static final String NOTES_SCHEMA="CREATE VIRTUAL TABLE "+TABLE_NAME+" USING fts3("+
            "_id INTEGER PRIMARY KEY"+COMMA+NOTE_TITLE+" TEXT"+COMMA+NOTE_TEXT+" TEXT"+COMMA+TRASH_STATUS+" INTEGER DEFAULT 0"+COMMA+TIME+" INTEGER"+");";

case LOADER_NOTELIST_ID:
           String[] projection = new String[]{NotesModel.NotesTable._ID, NotesModel.NotesTable.NOTE_TITLE, NotesModel.NotesTable.NOTE_TEXT,NotesModel.NotesTable.TIME,NotesModel.NotesTable.TRASH_STATUS};
            String sortOrder = NotesModel.NotesTable.TIME+ " DESC";
            String where = NotesModel.NotesTable.TRASH_STATUS+"=0";
            CursorLoader cursorLoader = new CursorLoader(getApplicationContext().getApplicationContext(), uri, projection, where, null , sortOrder
            );

            return cursorLoader;

 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {

    SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
    Cursor cursor;

    switch (uriMatcher.match(uri)) {
        case NOTES_LIST://display the whole list, for main activity
            qb.setTables(NotesModel.NotesTable.TABLE_NAME);//set table to be queried
           break;

        case NOTES_ITEM:
            qb.setTables(NotesModel.NotesTable.TABLE_NAME);
            qb.appendWhere(NotesModel.NotesTable._ID + " = "+ uri.getLastPathSegment());
            break;

        default:
            throw new IllegalArgumentException("Invalid URI: " + uri);
    }

    cursor = qb.query(db,projection,selection,selectionArgs,null,null,sortOrder);
    cursor.setNotificationUri(getContext().getContentResolver(), uri);//observer for loader
    return cursor;
}

onCreateCursorLoader:

 public static final String NOTES_SCHEMA="CREATE VIRTUAL TABLE "+TABLE_NAME+" USING fts3("+
            "_id INTEGER PRIMARY KEY"+COMMA+NOTE_TITLE+" TEXT"+COMMA+NOTE_TEXT+" TEXT"+COMMA+TRASH_STATUS+" INTEGER DEFAULT 0"+COMMA+TIME+" INTEGER"+");";

case LOADER_NOTELIST_ID:
           String[] projection = new String[]{NotesModel.NotesTable._ID, NotesModel.NotesTable.NOTE_TITLE, NotesModel.NotesTable.NOTE_TEXT,NotesModel.NotesTable.TIME,NotesModel.NotesTable.TRASH_STATUS};
            String sortOrder = NotesModel.NotesTable.TIME+ " DESC";
            String where = NotesModel.NotesTable.TRASH_STATUS+"=0";
            CursorLoader cursorLoader = new CursorLoader(getApplicationContext().getApplicationContext(), uri, projection, where, null , sortOrder
            );

            return cursorLoader;

 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {

    SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
    Cursor cursor;

    switch (uriMatcher.match(uri)) {
        case NOTES_LIST://display the whole list, for main activity
            qb.setTables(NotesModel.NotesTable.TABLE_NAME);//set table to be queried
           break;

        case NOTES_ITEM:
            qb.setTables(NotesModel.NotesTable.TABLE_NAME);
            qb.appendWhere(NotesModel.NotesTable._ID + " = "+ uri.getLastPathSegment());
            break;

        default:
            throw new IllegalArgumentException("Invalid URI: " + uri);
    }

    cursor = qb.query(db,projection,selection,selectionArgs,null,null,sortOrder);
    cursor.setNotificationUri(getContext().getContentResolver(), uri);//observer for loader
    return cursor;
}

我还注意到，当我删除where参数时，它起了作用（但我需要该参数）

内容提供商：

 public static final String NOTES_SCHEMA="CREATE VIRTUAL TABLE "+TABLE_NAME+" USING fts3("+
            "_id INTEGER PRIMARY KEY"+COMMA+NOTE_TITLE+" TEXT"+COMMA+NOTE_TEXT+" TEXT"+COMMA+TRASH_STATUS+" INTEGER DEFAULT 0"+COMMA+TIME+" INTEGER"+");";

case LOADER_NOTELIST_ID:
           String[] projection = new String[]{NotesModel.NotesTable._ID, NotesModel.NotesTable.NOTE_TITLE, NotesModel.NotesTable.NOTE_TEXT,NotesModel.NotesTable.TIME,NotesModel.NotesTable.TRASH_STATUS};
            String sortOrder = NotesModel.NotesTable.TIME+ " DESC";
            String where = NotesModel.NotesTable.TRASH_STATUS+"=0";
            CursorLoader cursorLoader = new CursorLoader(getApplicationContext().getApplicationContext(), uri, projection, where, null , sortOrder
            );

            return cursorLoader;

 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {

    SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
    Cursor cursor;

    switch (uriMatcher.match(uri)) {
        case NOTES_LIST://display the whole list, for main activity
            qb.setTables(NotesModel.NotesTable.TABLE_NAME);//set table to be queried
           break;

        case NOTES_ITEM:
            qb.setTables(NotesModel.NotesTable.TABLE_NAME);
            qb.appendWhere(NotesModel.NotesTable._ID + " = "+ uri.getLastPathSegment());
            break;

        default:
            throw new IllegalArgumentException("Invalid URI: " + uri);
    }

    cursor = qb.query(db,projection,selection,selectionArgs,null,null,sortOrder);
    cursor.setNotificationUri(getContext().getContentResolver(), uri);//observer for loader
    return cursor;
}

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任何意见或解决方案都将不胜感激。

经过大量研究，我得出结论，fts3表无法支持游标加载程序（）或查询（）

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总的来说，fts3默认情况下不支持括号，我发现上面两个方法的选择参数在执行时自动位于括号内。由于这个原因，我的listview是空的，这就是为什么一旦删除where子句，它就会再次工作。但是，我需要这个选择参数，在一天结束时，我还没有一个实际的解决方案来解决搜索互联网后的问题。

您是否尝试“手动”执行sqlite3应用程序并测试您的查询？