Android中的SQLite中的变量为空

Question

我的提供者是

public Cursor query(Uri  uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
    if(uriMatcher.match(uri) == TEXTS_ID)  
        selection = DBOpenHelper.text_ID + "=" + uri.getLastPathSegment();
    return database.query(DBOpenHelper.TABLE_textS, DBOpenHelper.ALL_COLUMNS, selection, selectionArgs, null, null,DBOpenHelper.text_CREATED + " DESC");
}

我称之为：

String [] cursorArgs = new String [] {"0"};
String selection = "textId=";
return new CursorLoader(this, textsProvider.CONTENT_URI, null, selection, cursorArgs, null); 

如你所见，我想在textId = 0

时发短信

Caused by: android.database.sqlite.SQLiteException: near "ORDER": syntax error (code 1): , while compiling: SELECT _id, textId, textText, textCreate FROM texts WHERE textId= ORDER BY textCreated DESC

Answer 1

在SQLite之后，?的选择必须为=，因此请尝试

String selection = "textId=?";