Question

我有一个名为<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script> <script type="text/javascript" src="http://stuk.github.io/jszip/dist/jszip.min.js"></script> <script type="text/javascript" src="http://stuk.github.io/jszip-utils/dist/jszip-utils.js"></script> <script type="text/javascript" src="http://stuk.github.io/jszip/vendor/FileSaver.js"></script> <input type="file" class="hide load"> <a class="trigload" href="javascript:void(0)">Load Image</a> <a class="download fr" href="javascript:void(0)">Download</a> <div class="logo"></div> <div class="fill" align="center"> <canvas class="holder" width="128" height="128"></canvas> </div>的表，主键为foods，插入后为food_id db.insert（）integer primary key autoincrement. Now i know that food_id returns id (-1 if insertion failed) but the question is if this is the same id as food_id`，因为我我正在列表和应用范围中保存食品项目。

Answer 1

请试试这个 -

        //local database variables
            private DataSourceUserRecords dataResource ; 
            private SQLiteDatabase _database = null;
            private Cursor _cursor = null;
            private MySqliteHelper DBHelper;

将此代码添加到onCreate或您要呼叫的位置。

    DBHelper = new MySqliteHelper(UploadImgService.this);
                _database = DBHelper.getWritableDatabase();
                dataResource  = new DataSourceUserRecords(UploadImgService.this);
                dataResource.open();

              _cursor = _database.rawQuery("select * from "+MySqliteHelper.TABLE_NAME, null);

            _cursor.moveToFirst(); 

            while(_cursor.isAfterLast() == false){


                String _food_id =  _cursor.getInt(_cursor.getColumnIndex(MySqliteHelper.YOUR_COLUMN_ID));

                System.out.println("Food ID from db : " + _food_id );


                _cursor.moveToNext();
            }
            _cursor.close();

插入后获取行的主键

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