如何編寫方法爲Android SQLite數據庫

Question

我創建一個樣本庫的應用程序，我想儲存庫項目在本地SQLite數據庫

樣品查詢：

select filed1 from tablename where filed2="66547"; 

     public List<String> getAllLabels(String number){ 
     List<String> labels = new ArrayList<String>(); 

     String foldername; 

     // Select All Query 
     String selectQuery = " SELECT " + Databaseconnect.FILEPATH + " FROM "+  Databaseconnect.TABLE_FILE + " WHERE" + Databaseconnect.FOLDERLINK="+"number; 



     SQLiteDatabase db = dbHelper.getReadableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 

     // looping through all rows and adding to list 
     if (cursor.moveToFirst()) { 
      do { 
       labels.add(cursor.getString(0)); 
      } while (cursor.moveToNext()); 
     } 

     // closing connection 
     cursor.close(); 
     db.close(); 

     // returning lables 
     return labels; 
    } 

我仍然有錯誤，怎麼寫列表在此查詢..請給我的解決方案

Answer 1

試試這個：

String selectQuery =" SELECT " + Databaseconnect.FILEPATH + " FROM "+Databaseconnect.TABLE_FILE + " WHERE " + Databaseconnect.FOLDERLINK + "=" + String.valueOf(number) + ";";