Android - Passing intent with object from one activity to another (crashing)

Question

When I'm trying to pass an intent from one activity to another my app crashes, without the putExtra() it works fine.

Here's my snippet from the first activity

 ArrayList<Subject> subjectList = new ArrayList<Subject>();

   public void computeGrades(View view){

    Intent intent = new Intent(this, JLCSActivity2B.class);
    intent.putExtra("subjectList", subjectList);
    startActivity(intent);
   }

The Second Activity

public class JLCSActivity2B extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main2);

    Intent intent = getIntent();
    ArrayList<Subject> subjectList = (ArrayList<Subject>) intent.getSerializableExtra("subjectList");
 }
}

See: http://androidideasblog.blogspot.com/2010/02/passing-list-of-objects-between.html — dieter_h, Aug 17 '15 at 10:26
possible duplicate of [How to send an object from one Android Activity to another using Intents?](http://stackoverflow.com/questions/2139134/how-to-send-an-object-from-one-android-activity-to-another-using-intents) — King of Masses, Aug 17 '15 at 10:32

Passiondroid · Answer 1 · 2015-08-17T10:35:08.590

Implement your Subject class with Parcelable or Serializable Android does not allow to pass objects between activities unless they implement Parcelable or Serializable. The fact that Parcelable is faster than Serialization makes it a preferred choice of approach while passing an object.

Example implementing Parcelable - http://wptrafficanalyzer.in/blog/android-parcelable-example-passing-data-between-activities/

Parcelable Vs Serializable - http://www.3pillarglobal.com/insights/parcelable-vs-java-serialization-in-android-app-development

score 0 · Answer 2 · answered Aug 17 '15 at 10:34

0

You need to implement Serializable in your Subject class.

public class Subject implements Serializable {
  //your variables, constructor and getters and setters
}

In your Source Activity, use this :

ArrayList<Subject> subjectList = new ArrayList<Subject>();
Intent intent = new Intent(SourceActivity.this, TargetActivity.class);
intent.putExtra("subjectList", subjectList);

In your Target Activity, use this :

ArrayList<Subject> subjectList = new ArrayList<Subject>();
subjectList = (ArrayList<Question>)getIntent().getSerializableExtra("subjectList");

I hope it helps!

answered Aug 17 '15 at 10:34

Rajesh Jadav

12,801
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I used this and it's still crashing. Also, I implemented Serializable. – Zelgh Aug 17 '15 at 11:24
doc contains all apps logs. i need only specific app crash log when application is crashing. – Rajesh Jadav Aug 17 '15 at 12:31
Sorry for late reply, this is the log crash. https://drive.google.com/file/d/0B59PlP6tgCBzVUNsX3BkVjFuSTQ/view?usp=sharing – Zelgh Aug 19 '15 at 11:50

score 0 · Answer 3 · answered Aug 17 '15 at 11:48

You can extend your entity class with serializable or better than seriablizable with parcelable interface.

You should implement parcelable interface in your Subject entity

public class Subject implements Parcelable {
    String parceldata;

    // your other fields with getter & setters

    public Subject(Parcel in) {
        String[] data = new String[1];
        in.readStringArray(data);
        this.parceldata = data[0];
    }

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

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

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        // TODO Auto-generated method stub

    }
}

for sending

args.putParcelable("data", subjectlist);

and to access

subjectlist = (ArrayList<Subject>) getArguments().getParcelable("data");

hope this will help you..

Android - Passing intent with object from one activity to another (crashing)

3 Answers3