how to send list object with list in it through parcelable

Question

I'm not able to get list object which has another list in it through parcelable to another activity. Below is my code.

SnipDataEvents.java

public class SnipDataEvents implements Parcelable {

private String title,image,language,bookingUrl,infoUrl,genre;
private List<Venues> venuesList;

public SnipDataEvents(String title,String image,String language,String    genre,String bookingUrl,String infoUrl,List<Venues> list){
    venuesList = new ArrayList<>();
    venuesList.addAll(list);
    this.title = title;
    this.image = image;
    this.language = language;
    this.genre = genre;
    this.bookingUrl = bookingUrl;
    this.infoUrl = infoUrl;
    this.venuesList = list;

}


protected SnipDataEvents(Parcel in) {
    title = in.readString();
    image = in.readString();
    language = in.readString();
    bookingUrl = in.readString();
    infoUrl = in.readString();
    genre = in.readString();
    in.readTypedList(getVenuesList(),Venues.CREATOR);
}

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

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

public String getImage() {
    return image;
}

public String getTitle() {
    return title;
}

public List<Venues> getVenuesList() {
    return venuesList;
}

public String getBookingUrl() {
    return bookingUrl;
}

public String getGenre() {
    return genre;
}

public String getInfoUrl() {
    return infoUrl;
}

public String getLanguage() {
    return language;
}

public void setVenuesList(List<Venues> venuesList) {
    this.venuesList = venuesList;
}

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

@Override
public void writeToParcel(Parcel parcel, int i) {
    parcel.writeString(title);
    parcel.writeString(image);
    parcel.writeString(language);
    parcel.writeString(bookingUrl);
    parcel.writeString(infoUrl);
    parcel.writeString(genre);
    parcel.writeTypedList(venuesList);


}
}

Venues.java

public class Venues implements Parcelable {
private String name;
//private List<String> showTimes;

public Venues(String name, List<String> showTimes) {
    //showTimes = new ArrayList<>();
    this.name = name;
    //this.showTimes = showTimes;
}

protected Venues(Parcel in) {
    name = in.readString();
    //showTimes = in.createStringArrayList();
}


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

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

public String getName() {
    return name;
}

//public List<String> getShowTimes() {
// return showTimes;
//  }

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

@Override
public void writeToParcel(Parcel parcel, int i) {
    parcel.writeString(name);
}
}

MainActivity.java

 Intent intent = new Intent(MainActivity.this, DetailActivity.class);
 Bundle bundle = new Bundle();
 bundle.putParcelableArrayList("snipdataevents",(ArrayList<SnipDataEvents>)snipDataEvents);
 intent.putExtras(bundle);
 startActivity(intent);

DetailActivity.java

Bundle bundle = getIntent().getExtras();
snipDataEvents = bundle.getParcelableArrayList("snipdataevents");

when I run the code ,in DetailActivity.java bundle.getParcelableArrayList("snipdataevents") returns null

when I removed this

in.readTypedList(getVenuesList(),Venues.CREATOR);

and

parcel.writeTypedList(venuesList);

aboves lines in SnipDataEvents.java then run, bundle.getParcelableArrayList("snipdataevents") returns list.

I don't know whats wrong with the code... Can anyone please help??

I don't know but I suggest lib https://github.com/johncarl81/parceler.It's easy to use — Rajasekaran M, Jul 07 '18 at 06:33

score 0 · Answer 1 · answered Jul 07 '18 at 06:51

You can done this one by Passing ArrayList in form of String.

Add implementation 'com.google.code.gson:gson:2.8.4' in dependencies block build.gradle.
Click on Sync Project with Gradle Files

SnipDataEvents.java

public class SnipDataEvents {

    private String title, image, language, bookingUrl, infoUrl, genre;
    private List<Venues> venuesList;

    public SnipDataEvents(String title, String image, String language, String genre, String bookingUrl, String infoUrl, List<Venues> list) {
        venuesList = new ArrayList<>();
        venuesList.addAll(list);
        this.title = title;
        this.image = image;
        this.language = language;
        this.genre = genre;
        this.bookingUrl = bookingUrl;
        this.infoUrl = infoUrl;
        this.venuesList = list;
    }

    public String getImage() {
        return image;
    }

    public String getTitle() {
        return title;
    }

    public List<Venues> getVenuesList() {
        return venuesList;
    }

    public void setVenuesList(List<Venues> venuesList) {
        this.venuesList = venuesList;
    }

    public String getBookingUrl() {
        return bookingUrl;
    }

    public String getGenre() {
        return genre;
    }

    public String getInfoUrl() {
        return infoUrl;
    }

    public String getLanguage() {
        return language;
    }
}

Venues.java

public class Venues {
    private String name;
    public Venues(String name, List<String> showTimes) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
}

MainActivity.java

Intent intent = new Intent(MainActivity.this, DetailActivity.class);
Bundle bundle = new Bundle();
bundle.putExtra("snipdataevents", new Gson().toJson(snipDataEvents));
intent.putExtras(bundle);
startActivity(intent);

DetailActivity.java

String json = getIntent().getStringExtra("snipdataevents");
snipDataEvents = Arrays.asList(new Gson().fromJson(json, SnipDataEvents[].class))

how to send list object with list in it through parcelable

1 Answers1

SnipDataEvents.java

Venues.java

MainActivity.java

DetailActivity.java