使用查詢從sqlite中的多列執行多個值？

我引用了這個link並能夠使數據庫查詢過濾。目前我使用下面的代碼用於過濾7個BusTypes從數據庫和下面的代碼工作正常，但我必須現在boardingpoint和droppingpoints也適用濾波器。我怎樣才能做到這一點？使用查詢從sqlite中的多列執行多個值？

我的數據庫中包含多個boarding_point的列表作爲一個字符串，因爲每個城市都有多個登機，等。，[城市pointone，城市pointtwo，城市point_three]如在bording_point字符串。現在我想用一個城市點等。查詢，如果我搜索與城市pointone它應該給我有該點的所有公交車..

公共final類DatabaseConstants {

// To prevent someone from accidentally instantiating the contract class, 
// make the constructor private. 

private DatabaseConstants(){ 
} 

public static class FeedEntry implements BaseColumns { 
    public static final String TABLE_NAME = "temp_table"; 
    public static final String ID = "id"; 
    public static final String FROM_CITY_NAME = "fromcityname"; 
    public static final String SRC_TIME = "srctime"; 
    public static final String TO_CITY_NAME = "tocityname"; 
    public static final String DES_TIME = "destime"; 
    public static final String DISTANCE = "distance"; 
    public static final String BUS_ID = "busid"; 
    public static final String OPERATOR_NAME = "operatorname"; 
    public static final String BUS_TYPE = "bustype"; 
    public static final String BUS_SEAT = "busseat"; 
    public static final String DURATION = "total_duration"; 
    public static final String BOARDING_POINT = "boarding_points"; 
    public static final String DROPPING_POINT = "dropping_points"; 

    public static final String CREATE_TABLE = ("CREATE TABLE " + TABLE_NAME + " (" 
      + ID + " TEXT PRIMARY KEY , " 
      + FROM_CITY_NAME + " TEXT, " 
      + SRC_TIME + " TEXT, " 
      + TO_CITY_NAME + " TEXT, " 
      + DES_TIME + " TEXT, " 
      + DISTANCE + " TEXT, " 
      + BUS_ID + " TEXT, " 
      + OPERATOR_NAME + " TEXT, " 
      + BUS_TYPE + " TEXT, " 
      + BUS_SEAT + " TEXT, " 
      + DURATION + " TEXT, " 
      + BOARDING_POINT + " TEXT, " 
      + DROPPING_POINT + " TEXT)"); 

    public static final String DROP_TABLE = ("DROP TABLE IF EXISTS " + TABLE_NAME); 
}

}

// Model類

public class BusDataModel { 
    private String id; 
    private String fromcityname; 
    private String src_time; 
    private String tocityname; 
    private String des_time; 
    private String distance; 
    private String busid; 
    private String operatorname; 
    private String bustype; 
    private String busseat; 
    private String busduration; 
    private String boarding_point; 
    private String droppint_point; 

    public BusDataModel() { 
    } 

    public BusDataModel(String id, String fromcityname, String src_time, String tocityname, String des_time, 
         String distance, String busid, String operatorname, String bustype, String busseat,String busduration, 
         String boarding_point,String droppint_point) { 
     this.id = id; 
     this.src_time = src_time; 
     this.des_time = des_time; 
     this.fromcityname = fromcityname; 
     this.tocityname = tocityname; 
     this.distance = distance; 
     this.busid = busid; 
     this.operatorname = operatorname; 
     this.bustype = bustype; 
     this.busseat = busseat; 
     this.busduration=busduration; 
     this.boarding_point=boarding_point; 
     this.droppint_point=droppint_point; 
    } 

    public String getBusduration() { 
     return busduration; 
    } 

    public void setBusduration(String busduration) { 
     this.busduration = busduration; 
    } 

    public String getid() { 
     return id; 
    } 

    public String getSrc_time() { 
     return src_time; 
    } 

    public String getDes_time() { 
     return des_time; 
    } 

    public String getFromcityname() { 
     return fromcityname; 
    } 

    public String getTocityname() { 
     return tocityname; 
    } 

    public String getDistance() { 
     return distance; 
    } 

    public String getBusid() { 
     return busid; 
    } 

    public String getOperatorname() { 
     return operatorname; 
    } 

    public String getBustype() { 
     return bustype; 
    } 

    public String getBusseat() { 
     return busseat; 
    } 

    public void setid(String id) { 
     this.id = id; 
    } 

    public void setSrc_time(String src_time) { 
     this.src_time = src_time; 
    } 

    public void setDes_time(String des_time) { 
     this.des_time = des_time; 
    } 

    public void setFromcityname(String fromcityname) { 
     this.fromcityname = fromcityname; 
    } 

    public void setTocityname(String tocityname) { 
     this.tocityname = tocityname; 
    } 

    public void setDistance(String distance) { 
     this.distance = distance; 
    } 

    public void setBusid(String busid) { 
     this.busid = busid; 
    } 

    public void setOperatorname(String operatorname) { 
     this.operatorname = operatorname; 
    } 

    public void setBustype(String bustype) { 
     this.bustype = bustype; 
    } 

    public void setBusseat(String busseat) { 
     this.busseat = busseat; 
    } 

    public String getBoarding_point() { 
     return boarding_point; 
    } 

    public void setBoarding_point(String boarding_point) { 
     this.boarding_point = boarding_point; 
    } 

    public String getDroppint_point() { 
     return droppint_point; 
    } 

    public void setDroppint_point(String droppint_point) { 
     this.droppint_point = droppint_point; 
    } 
}

//源碼類

public class FilterData extends SQLiteOpenHelper { 
    private Context context; 
    List<BusDataModel> filterdData = new LinkedList<>(); 
    public static final String DATABASE_NAME = "temp_user"; 

    public FilterData(Context context) { 
     super(context, DATABASE_NAME, null, 3); 
     this.context = context; 
     onCreate(this.getWritableDatabase()); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME + ";"); 
     db.execSQL(CREATE_TABLE); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    } 


    /** 
    * Method to save all Data into Database 
    * 
    * @param busDataModel to get all Data Generically 
    */ 
    public boolean addBusDetails(BusDataModel busDataModel) { 

     SQLiteDatabase db = this.getWritableDatabase(); 
     ContentValues values = new ContentValues(); 

     values.put(ID, busDataModel.getid()); 
     values.put(FROM_CITY_NAME, busDataModel.getFromcityname()); 
     values.put(SRC_TIME, busDataModel.getSrc_time()); 
     values.put(TO_CITY_NAME, busDataModel.getTocityname()); 
     values.put(DES_TIME, busDataModel.getDes_time()); 
     values.put(DISTANCE, busDataModel.getDistance()); 
     values.put(BUS_ID, busDataModel.getBusid()); 
     values.put(OPERATOR_NAME, busDataModel.getOperatorname()); 
     values.put(BUS_TYPE, busDataModel.getBustype()); 
     values.put(BUS_SEAT, busDataModel.getBusseat()); 
     values.put(DURATION, busDataModel.getBusduration()); 
     values.put(BOARDING_POINT, busDataModel.getBoarding_point()); 
     values.put(DROPPING_POINT, busDataModel.getDroppint_point()); 

     long isInserted = db.insert(TABLE_NAME, null, values); 
     db.close(); 
     if (isInserted == -1) 
      return false; 
     else 
      return true; 
    } 

public List<BusDataModel> setFilterByBusType(List<String> bus_types, List<String> boarding_types, List<String> dropping_types) { 

     List<BusDataModel> busList = new LinkedList<>(); 
     SQLiteDatabase db = this.getReadableDatabase(); 

     String[] data = {ID, FROM_CITY_NAME, SRC_TIME, TO_CITY_NAME, DES_TIME, 
       DISTANCE, BUS_ID, OPERATOR_NAME, BUS_TYPE, BUS_SEAT, DURATION, BOARDING_POINT, DROPPING_POINT}; 

     String selection = BUS_TYPE + " IN (?,?,?,?,?,?,?)"; 
     String[] selectionArgs = (String[]) bus_types.toArray(new String[bus_types.size()]); 

     Cursor cursor = db.query(TABLE_NAME, data, selection, selectionArgs, 
       null, null, null); 

     BusDataModel busDataModel; 
     if (cursor.moveToFirst()) { 
      do { 
       busDataModel = new BusDataModel(); 
       busDataModel.setid(cursor.getString(cursor.getColumnIndex(ID))); 
       busDataModel.setFromcityname(cursor.getString(cursor.getColumnIndex(FROM_CITY_NAME))); 
       busDataModel.setSrc_time(cursor.getString(cursor.getColumnIndex(SRC_TIME))); 
       busDataModel.setTocityname(cursor.getString(cursor.getColumnIndex(TO_CITY_NAME))); 
       busDataModel.setDes_time(cursor.getString(cursor.getColumnIndex(DES_TIME))); 
       busDataModel.setDistance(cursor.getString(cursor.getColumnIndex(DISTANCE))); 
       busDataModel.setBusid(cursor.getString(cursor.getColumnIndex(BUS_ID))); 
       busDataModel.setOperatorname(cursor.getString(cursor.getColumnIndex(OPERATOR_NAME))); 
       busDataModel.setBustype(cursor.getString(cursor.getColumnIndex(BUS_TYPE))); 
       busDataModel.setBusseat(cursor.getString(cursor.getColumnIndex(BUS_SEAT))); 
       busDataModel.setBusduration(cursor.getString(cursor.getColumnIndex(DURATION))); 
       busDataModel.setBoarding_point(cursor.getString(cursor.getColumnIndex(BOARDING_POINT))); 
       busDataModel.setDroppint_point(cursor.getString(cursor.getColumnIndex(DROPPING_POINT))); 

       busList.add(busDataModel); 
      } while (cursor.moveToNext()); 
     } 
     db.close(); 
     cursor.close(); 

     return busList; 

    } 

    }

來源

2017-03-11 Ranjan Das

請顯示完整的代碼示例。你應該用適當的領域和方法展示一堂課。同時顯示錶格的創建方式。 –

我已經給出了你說的細節 –

我建議直接使用Cursor而不是將數據加載到列表中。當您擁有一個大型數據集時，這一點尤其重要，您不需要或不能一次加載到內存中。 –

我的數據庫中包含多個boarding_point的列表作爲一個字符串，因爲每個城市都有多個登機，等。，[市pointone，城市pointtwo，城市point_three]作爲字符串在bording_point。

首先你需要解析字符串，以便你有每個城市。然後，您可以使用這些城市建立查詢。

來源

2017-03-11 12:08:15

您能證明一個代碼片段 –

使用查詢從sqlite中的多列執行多個值？

回答

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