Передать пользовательский объект между действиями

Question

Я пробовал много разных решений, найденных здесь и на многих других сайтах - но я просто не могу заставить его работать!

У меня есть объект "Квартира" в одном упражнении, который должен использоваться в другом упражнении. Действие запускается из класса MyMapOverlayItem и должно запускать ApartmentInfoActivity, в котором должен использоваться объект Apartment.

MyMapOverlayItem.java:

package com.android.madsoft.spotter;

import java.util.ArrayList;

import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.Bundle;

import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;

public class MyMapOverlayIcon extends ItemizedOverlay<OverlayItem> {
    Context mContext;
    ArrayList<Apartment> myList;
    private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
    public MyMapOverlayIcon(Drawable defaultMarker) {
        super(defaultMarker);

    }

    public MyMapOverlayIcon(Drawable defaultMarker, Context context, ArrayList<Apartment> myList) {
        super(boundCenterBottom(defaultMarker));
          mContext = context;
          this.myList = myList;

        }

    public void addOverlay(OverlayItem overlay) {
        mOverlays.add(overlay);
        populate();
    }

    @Override
    protected boolean onTap(int index) {
        Apartment ap = myList.get(index);
        ApartmentParcel ap1 = new ApartmentParcel(ap);
        Intent i = new Intent(mContext, ApartmentInfoActivity.class);
        Bundle b = new Bundle();
        b.putParcelable("app", ap1);
        i.putExtras(b);
//      i.putExtra("app",ap1);
//      b.putSerializable("apartment", ap);

        // WHAT TO DO!?

        mContext.startActivity(i);

      return true;
    }

    @Override
    protected OverlayItem createItem(int i) {
      return mOverlays.get(i);
    }

    @Override
    public int size() {
      return mOverlays.size();
    }

}

Apartment.java:

package com.android.madsoft.spotter;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;


public class Apartment {


    private static final long serialVersionUID = 1L;
    int latitude, longitude;
    String id, 
    zipcode, 
    size, 
    rooms, 
    rentprice, 
    deposit, 
    takeoverdate, 
    rentperiod, 
    furniturized, 
    usagecost, 
    addeddate, 
    description,
    prepaid;
    ArrayList<String> imageList, phonenumbers;
    int imagecount = 1;
    ArrayList<Bitmap> bigBitmapList;
    ArrayList<Bitmap> smallBitmapList;

    public Apartment(String id, int latitude, int longitude, 
                    String zipcode, String size, String rooms, 
                    String rentprice, String deposit, String prepaid, String takeoverdate, 
                    String rentperiod, String furniturized, String usagecost, 
                    String addeddate, String description, ArrayList<String> imageList, ArrayList<String> phonenumbers){
        bigBitmapList = new ArrayList<Bitmap>();
        smallBitmapList = new ArrayList<Bitmap>();
        this.addeddate = addeddate;
        this.deposit = deposit;
        this.description = description;
        this.furniturized = furniturized;
        this.id = id;
        this.imageList = imageList;
        this.latitude = latitude;
        this.longitude = longitude;
        this.phonenumbers = phonenumbers;
        this.prepaid = prepaid;
        this.rentperiod = rentperiod;
        this.rentprice = rentprice;
        this.rooms = rooms;
        this.size = size;
        this.takeoverdate = takeoverdate;
        this.usagecost = usagecost;
        this.zipcode = zipcode;

        for (String s :imageList){

            URL myFileUrl = null;
            try {
                 myFileUrl= new URL(s);
            } catch (MalformedURLException e) {
                 e.printStackTrace();
            }
            try {
                 HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
                 conn.setDoInput(true);
                 conn.connect();
                 InputStream is = conn.getInputStream();
                 Bitmap image = BitmapFactory.decodeStream(is); //Saves the current icon
                 bigBitmapList.add(image);
                 //Icon will now be resized to 125px*100px               
                    Bitmap resized; 
                    int scalerate = (int)image.getHeight()/60;
                    int newHeight = (int)image.getHeight()/scalerate;
                    int newWidth = (int)image.getWidth()/scalerate; 
                    resized = Bitmap.createScaledBitmap(image, newWidth, newHeight, false);
                    smallBitmapList.add(resized);
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            }
        }

ApartmentParcel.java:

package com.android.madsoft.spotter;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Parcel;
import android.os.Parcelable;

public class ApartmentParcel implements Parcelable {

    private static final long serialVersionUID = 1L;
    int latitude, longitude;
    String id, 
    zipcode, 
    size, 
    rooms, 
    rentprice, 
    deposit, 
    takeoverdate, 
    rentperiod, 
    furniturized, 
    usagecost, 
    addeddate, 
    description,
    prepaid;
    ArrayList<String> imageList, phonenumbers;
    int imagecount = 1;
    ArrayList<Bitmap> bigBitmapList;
    ArrayList<Bitmap> smallBitmapList;

    public ApartmentParcel(String id, int latitude, int longitude, 
                    String zipcode, String size, String rooms, 
                    String rentprice, String deposit, String prepaid, String takeoverdate, 
                    String rentperiod, String furniturized, String usagecost, 
                    String addeddate, String description, ArrayList<String> imageList, ArrayList<String> phonenumbers){
        bigBitmapList = new ArrayList<Bitmap>();
        smallBitmapList = new ArrayList<Bitmap>();
        this.addeddate = addeddate;
        this.deposit = deposit;
        this.description = description;
        this.furniturized = furniturized;
        this.id = id;
        this.imageList = imageList;
        this.latitude = latitude;
        this.longitude = longitude;
        this.phonenumbers = phonenumbers;
        this.prepaid = prepaid;
        this.rentperiod = rentperiod;
        this.rentprice = rentprice;
        this.rooms = rooms;
        this.size = size;
        this.takeoverdate = takeoverdate;
        this.usagecost = usagecost;
        this.zipcode = zipcode;

        for (String s :imageList){

            URL myFileUrl = null;
            try {
                 myFileUrl= new URL(s);
            } catch (MalformedURLException e) {
                 e.printStackTrace();
            }
            try {
                 HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
                 conn.setDoInput(true);
                 conn.connect();
                 InputStream is = conn.getInputStream();
                 Bitmap image = BitmapFactory.decodeStream(is); //Saves the current icon
                 bigBitmapList.add(image);
                 //Icon will now be resized to 125px*100px               
                    Bitmap resized; 
                    int scalerate = (int)image.getHeight()/60;
                    int newHeight = (int)image.getHeight()/scalerate;
                    int newWidth = (int)image.getWidth()/scalerate; 
                    resized = Bitmap.createScaledBitmap(image, newWidth, newHeight, false);
                    smallBitmapList.add(resized);
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            }
        }

    public ApartmentParcel(Apartment ap){
        bigBitmapList = new ArrayList<Bitmap>();
        smallBitmapList = new ArrayList<Bitmap>();
        this.addeddate = ap.getAddeddate();
        this.deposit = ap.getDeposit();
        this.description = ap.getDescription();
        this.furniturized = ap.getFurniturized();
        this.id = ap.getId();
        this.imageList = ap.getImageList();
        this.latitude = ap.getLatitude();
        this.longitude = ap.getLongitude();
        this.phonenumbers = ap.getPhonenumbers();
        this.prepaid = ap.getPrepaid();
        this.rentperiod = ap.getRentperiod();
        this.rentprice = ap.getRentprice();
        this.rooms = ap.getRooms();
        this.size = ap.getSize();
        this.takeoverdate = ap.getTakeoverdate();
        this.usagecost = ap.getUsagecost();
        this.zipcode = ap.getZipcode();
        runMyParcel();
    }

    private void runMyParcel(){
        for (String s :imageList){

            URL myFileUrl = null;
            try {
                 myFileUrl= new URL(s);
            } catch (MalformedURLException e) {
                 e.printStackTrace();
            }
            try {
                 HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
                 conn.setDoInput(true);
                 conn.connect();
                 InputStream is = conn.getInputStream();
                 Bitmap image = BitmapFactory.decodeStream(is); //Saves the current icon
                 bigBitmapList.add(image);
                 //Icon will now be resized to 125px*100px               
                    Bitmap resized; 
                    int scalerate = (int)image.getHeight()/60;
                    int newHeight = (int)image.getHeight()/scalerate;
                    int newWidth = (int)image.getWidth()/scalerate; 
                    resized = Bitmap.createScaledBitmap(image, newWidth, newHeight, false);
                    smallBitmapList.add(resized);
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            }
    }

    public void setSmallBitmapList(ArrayList<Bitmap> smallBitmapList) {
        this.smallBitmapList = smallBitmapList;
    }


    @Override
    public int describeContents() {
        // TODO Auto-generated method stub
        return 0;
    }


    @Override
    public void writeToParcel(Parcel out, int flags) {
        out.writeString(id); 
        out.writeString(zipcode); 
        out.writeString(size); 
        out.writeString(rooms); 
        out.writeString(rentprice); 
        out.writeString(deposit); 
        out.writeString(takeoverdate); 
        out.writeString(rentperiod); 
        out.writeString(furniturized);
        out.writeString(usagecost);
        out.writeString(addeddate);
        out.writeString(description);
        out.writeString(prepaid);
        out.writeStringList(phonenumbers);
        out.writeList(bigBitmapList);
        out.writeList(smallBitmapList);

    }

    private ApartmentParcel(Parcel in) {
        id = in.readString();
        zipcode = in.readString();
        size = in.readString();     
        rooms = in.readString();
        rentprice = in.readString();
        deposit = in.readString();
        takeoverdate = in.readString();
        rentperiod = in.readString();
        furniturized = in.readString();
        usagecost = in.readString();
        addeddate = in.readString();
        description = in.readString();
        prepaid = in.readString();
        in.readStringList(phonenumbers);
        in.readTypedList(bigBitmapList, Bitmap.CREATOR);
        in.readTypedList(smallBitmapList, Bitmap.CREATOR);
    }

    public static final Creator<ApartmentParcel> CREATOR = new Creator<ApartmentParcel>() {
        public ApartmentParcel createFromParcel(Parcel in) {
            return new ApartmentParcel(in);
        }

        public ApartmentParcel[] newArray(int size) {
            return new ApartmentParcel[size];
        }
    };
}

ApartmentInfoActivity.java:

    package com.android.madsoft.spotter;

    import android.app.Activity;
    import android.os.Bundle;
    import android.widget.TextView;

    public class ApartmentInfoActivity extends Activity {


        @Override
            protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.infoview);
//      Apartment ap = (Apartment)getIntent().getSerializableExtra("apartment");
        Apartment ap = (Apartment)getIntent().getParcelableExtra("app");
        TextView zipView = (TextView)findViewById(R.id.txtInfoZip);
        zipView.setText(ap.getZipcode());
    }

    }

Answer 1

Заставьте ваш класс Aparment реализовать Serializable:

public class Apartment implements Serializable{

Затем на MyMapOverlayIcon:

Bundle b = new Bundle();
// WHAT TO DO!?
b.putSerializable("apartment", ap);

Затем на ApartmentInfoActivity:

Apartment ap = (Apartment) getIntent().getSerializableExtra("apartment");

Answer 2

Предпочтительный способ совместного использования объектов между действиями - сделать общий объект Parcelable http://developer.android.com/reference/android/os/Parcelable.html (см. Также http://developer.android.com/reference/android/os/Parcelable.Creator.html). Затем вы можете определить где-нибудь ключ String и использовать его для помещения и полученияПредмет, подлежащий продаже, в объект Bundle и из него.

В основном задании:

Intent newActivity = ...;
Bundle extras = new Bundle();

// use your key here to put the parcelable into the bundle

newActivity.putExtras(extras);
startActivity(newActivity);

И в дочернем задании

//child activity (onCreate())
Bundle intentExtras = getIntent().getExtras();
if(intentExtras != null){
   // use the key here to get your parcelable from the bundle
}

Если у вас есть коллекция предметовв вашем классе, который реализует Parcelable, вы можете справиться с этим так:

import java.util.ArrayList;
import java.util.Collection;

import android.graphics.Bitmap;
import android.os.Parcel;
import android.os.Parcelable;

public class ExampleParcelable implements android.os.Parcelable {

    private final String id;
    private final ArrayList<Bitmap> bitmapList = new ArrayList<Bitmap>();

    public ExampleParcelable(String id, Collection<Bitmap> bitmaps){
        this.id = id;
        this.bitmapList.addAll(bitmaps);
    }


    @Override
    public void writeToParcel(Parcel out, int flags) {
        // write stack to be duplicated in 'createFromParcel(Parcel in)'
        out.writeString(id);
        out.writeList(bitmapList);
    }

    @Override
    public int describeContents() {
        // your own logic here
        return 0;
    }

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

        @Override
        public ExampleParcelable createFromParcel(Parcel in) {
            String id = in.readString();
            @SuppressWarnings("unchecked")
            ArrayList<Bitmap> bitmaps = (ArrayList<Bitmap>)in.readArrayList(Bitmap.class.getClassLoader());
            return new ExampleParcelable(id, bitmaps);
        }

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