Pass through Parcelable List through bundle of activity

Question

How to pass through Parcelable, an object of type List In the fragment through the Bundle of Activity? Constantly produces an error type NPE, In the preparation Parcelable in OnCreateView.

// Fragment object в Activity
public Fragment systemFragList(){
          a = new AppsManagerFragment();
          b = new Bundle();
          dApps = new DataApps(this);
          //transmission through List the designer
          listCreater = new MakingListObject(dApps.getSystemAppsList()); 
          b.putParcelable("List", listCreater); // transfer Parcelable object through Bundle
          a.setArguments(b);

        return a;
    };

// Parcelable class
public class MakingListObject implements Parcelable {

    private List<ApplicationInfo> list;

 // get an object List <ApplicationInfo> constructor
    public MakingListObject(List<ApplicationInfo> l) { 
        this.list = l;
    }
    public MakingListObject(Parcel in) {
        in.readTypedList(list, ApplicationInfo.CREATOR); // read
    }
    public List<ApplicationInfo> getList(){ // vethod return list
        return list;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) { // write
       dest.writeTypedList(list);
    }
    @Override
    public int describeContents() {
        return 0;
    }

   CREATOR...
}

//Admission List to the Fragment in onCreateView()    
MakingListObject obj = (MakingListObject)this.getArguments().getParcelable("List"); // NPE ERROR
List<ApplicationInfo> listData = obj.getList();

Please try to phrase your question more clearly, it's pretty hard to understand what you need. — Emil, Jan 11 '15 at 19:58

score 2 · Answer 1 · edited Feb 07 '20 at 07:13

2

store list of Parcelable using

Bundle dataToSend = new Bundle();
ArrayList<? super Parcelable> list = new ArrayList<>();

//add items here

and read it using

Bundle receivedData = ...
receivedData.getParcelableArrayList("foo")

hope this helps

edited Feb 07 '20 at 07:13

geisterfurz007

5,292
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answered May 06 '17 at 16:27

Lakshan Dissanayake

521
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score 0 · Answer 2 · answered Jan 11 '15 at 19:57

0

You have to init the list first.

public MakingListObject(Parcel in) {
    list = new ArrayList<ApplicationInfo>;
    in.readTypedList(list, ApplicationInfo.CREATOR); // read
}

answered Jan 11 '15 at 19:57

elcolto

961
7
11

The code can be seen that the constructor initializes the list. Though so I also tried and still there NPE. – Dimas Jan 12 '15 at 14:06

Pass through Parcelable List through bundle of activity

2 Answers2