传递对象的自定义数组列表

Question

I am trying to pass a custom ArrayList of objects between activites. I keep getting wrong argument errors. Read around on exisitng questions but none of them could resolve the issue.

Could you please point me in the right direction?

CODE BREAKDOWN:

public class object1 implements parcelable{
    public void writeToParcel(Parcel dest, int flags) {
    //things that need to be written

    }
    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public MoodEvent createFromParcel(Parcel in) {
            return new MoodEvent(in);
        }

        public MoodEvent[] newArray(int size) {
            return new MoodEvent[size];
        }
    };
public class list1{  //** "implements Parceblable" gives error**
      private ArrayList<object1> ArrayList1, ArrayList2; //** Filters used on **ArrayList2
      public void writeToParcel(Parcel out) {
        out.writeTypedList(ArrayList1);
    }


    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public MoodEvent createFromParcel(Parcel in) {
            return new MoodEvent(in);
        }

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

public class someActivity {
.
.
.
mapIntent = new Intent(oldActivity.this, NewActivity.class);
Bundle bundle = new Bundle();

bundle.putParcelableArrayList(moodEventList);   //**wrong argument types on both lines**
mapIntent.putParcelableArrayListExtra("mylist",moodEventList);
.
.
.
}

Answer 1

putParcelableArrayList will expect an ArrayList containing objects that implement the Parcelable interface.
Assuming your object1 class correctly implements this, you can use just a regular ArrayList<object1> instance and you don't need the custom list1 class.

If you really want to though, and your list1 class also implements the interface, you can use the putParcelable method, since your list is just a single parcelable now.

Answer 2

Try this

public class YOUR_CLASS_NAME implements Serializable

Passing data through intent using Serializable

Answer 3

You can try the following code to send and receive custom arraylist of objects from one activity to another.

Send Intent Values:

You can try the follwing code to send parsable arraylist with intent.

 private List<ResourceTypeList> mResourceList;
 public void sendParcableIntent()
 {
    Intent i=new Intent(ResourcePhoneBook.this,ResourceSort.class);
    Bundle toSend = new Bundle();
    toSend.putParcelableArrayList("Data", (ArrayList<? extends Parcelable>)mResourceList);
    i.putExtras(toSend);
    startActivity(i);
 }

Receive Intent Values:

You can get parcelable arraylist with normal ArrayList format.

ArrayList mArraylist1;
Bundle bdl = getIntent().getExtras();
mArraylist1 = bdl.getParcelableArrayList("Data");

parcelable model class:

public class ResourceTypeList implements Parcelable {

    @SerializedName("id")
    @Expose
    private Integer id;
    @SerializedName("resource_type")
    @Expose
    private String resourceType;

    /**
     *
     * @return
     *     The id
     */
    public Integer getId() {
        return id;
    }

    /**
     *
     * @param id
     *     The id
     */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
     *
     * @return
     *     The resourceType
     */
    public String getResourceType() {
        return resourceType;
    }

    /**
     *
     * @param resourceType
     *     The resource_type
     */
    public void setResourceType(String resourceType) {
        this.resourceType = resourceType;
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(resourceType);
        dest.writeInt(id);

    }

   public ResourceTypeList(String resourceType) {
       this.resourceType = resourceType;

   }
   protected ResourceTypeList(Parcel in) {
       resourceType = in.readString();
       id= in.readInt();

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

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