連接兩個不同的對象對於ArrayList的

Question

我有兩個類：

驅動程序類：

public static final class Driver implements DriverColumns, BaseColumns, Parcelable { 

     public static final Uri CONTENT_URI = BASE_CONTENT_URI.buildUpon().appendPath(PATH_DRIVERS).build(); 
     public static final String CONTENT_TYPE = "vnd.android.cursor.dir/com.test.console.drivers"; 
     public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.console.drivers"; 

     private int driver_id, driver_number; 
     private String driver_name; 

     public Driver() { 
     } 

     public Driver(int driverID, int driverNumber, String driverName) { 
      this.setDriverID(driverID); 
      this.setDriverNumber(driverNumber); 
      this.setDriverName(driverName); 
     } 

     public static Uri buildDriverUri(String driverID) { 
      return CONTENT_URI.buildUpon().appendPath(driverID).build(); 
     } 

     public int getDriverID() { 
      return driver_id; 
     } 

     public void setDriverID(int driver_id) { 
      this.driver_id = driver_id; 
     } 

     public int getDriverNumber() { 
      return driver_number; 
     } 

     public void setDriverNumber(int driver_number) { 
      this.driver_number = driver_number; 
     } 

     public String getDriverName() { 
      return driver_name; 
     } 

     public void setDriverName(String driver_name) { 
      this.driver_name = driver_name; 
     } 

     @Override 
     public int describeContents() { 
      return 0; 
     } 

     @Override 
     public void writeToParcel(Parcel dest, int flags) { 
      dest.writeInt(driver_id); 
      dest.writeInt(driver_number); 
      dest.writeString(driver_name); 
     } 

     private Driver(Parcel in) { 
      this.driver_id = in.readInt(); 
      this.driver_number = in.readInt(); 
      this.driver_name = in.readString(); 
     } 

     public static final Parcelable.Creator<Driver> CREATOR = new Parcelable.Creator<Driver>() { 

      @Override 
      public Driver createFromParcel(Parcel source) { 
       return new Driver(source); 
      } 

      @Override 
      public Driver[] newArray(int size) { 
       return new Driver[size]; 
      } 
     }; 
    } 

和車輛類別：

public static final class Vehicle implements VehicleColumns, BaseColumns, Parcelable { 

     public static final Uri CONTENT_URI = BASE_CONTENT_URI.buildUpon().appendPath(PATH_VEHICLES).build(); 
     public static final String CONTENT_TYPE = "vnd.android.cursor.dir/com.test.console.vehicles"; 
     public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.console.vehicles"; 

     private int vehicle_id, vehicle_number; 
     private String vehicle_vin; 

     public Vehicle() { 
     } 

     public Vehicle(int vehicleID, int vehicleNumber, String vehicleVin) { 
      setVehicleID(vehicleID); 
      setVehicleNumber(vehicleNumber); 
      setVehicleVin(vehicleVin); 
     } 

     public int getVehicleID() { 
      return vehicle_id; 
     } 

     public void setVehicleID(int mVehicleID) { 
      this.vehicle_id = mVehicleID; 
     } 

     public int getVehicleNumber() { 
      return vehicle_number; 
     } 

     public void setVehicleNumber(int mVehicleNumber) { 
      this.vehicle_number = mVehicleNumber; 
     } 

     public String getVehicleVin() { 
      return vehicle_vin; 
     } 

     public void setVehicleVin(String mVehicleVin) { 
      this.vehicle_vin = mVehicleVin; 
     } 

     public static Uri buildVehicleUri(String vehicleID) { 
      return CONTENT_URI.buildUpon().appendPath(vehicleID).build(); 
     } 

     @Override 
     public int describeContents() { 
      return 0; 
     } 

     @Override 
     public void writeToParcel(Parcel dest, int flags) { 
      dest.writeInt(vehicle_id); 
      dest.writeInt(vehicle_number); 
      dest.writeString(vehicle_vin); 
     } 

     private Vehicle(Parcel in) { 
      this.vehicle_id = in.readInt(); 
      this.vehicle_number = in.readInt(); 
      this.vehicle_vin = in.readString(); 
     } 

     public static final Parcelable.Creator<Vehicle> CREATOR = new Parcelable.Creator<Vehicle>() { 

      @Override 
      public Vehicle createFromParcel(Parcel source) { 
       return new Vehicle(source); 
      } 

      @Override 
      public Vehicle[] newArray(int size) { 
       return new Vehicle[size]; 
      } 
     }; 
    } 

我試圖鏈接他們在一起，所以我可以在ArrayList中使用它們。

基本上有一個列表：

驅動器+汽車

不知道我是否應該有一個超類？因爲我讀過，我們不能做這樣的事情：

ArrayList<Driver,Vehicle> drivers_vehicles = new ArrayList<Driver,Vehicle> 

我會在驅動程序類需要Sort the list由driver_number。

我該如何做到這一點？

謝謝..

Answer 1

你應該製造一種新型的驅動器和車輛。即

public class DriverVehiclePair implements Comparable<DriverVehiclePair> { 
    public Driver driver; 
    public Vehicle vehicle; 

    public int compareTo(DriverVehiclePair compareObject) 
    { 
     if (driver.driver_number < compareObject.driver_number) 
      return -1; 
     else if (driver_number == compareObject.driver_number) 
      return 0; 
     else 
      return 1; 
    } 

    ... 
} 

然後你讓你的新類型的列表，這樣

List<DriverVehiclePair> list = new ArrayList<DriverVehiclePair>(); 
// fill your list with data here (with proper arguments in constructors - I don't send any data below 
list.add(new DriverVehiclePair(new Driver(), new Vehicle())); 
// and finally sort it 
Collections.sort(list); 

排序呢你可能想讀上Comparable interface