Passing an array to activity (Android)

Question

In the activity A, I have built an array q1 of Question and I passed to activity B:

Intent i = new Intent(getApplicationContext(), B.class);
i.putExtra("questions", q1);
startActivity(i);
finish();

In the activity B:

Object c= getIntent().getExtras().getSerializable("questions");

Now, how can I reconvert "c" in an array of Questions? I can not make a cast (Question[])

Then you should be able to cast it. Are you getting an Exception? If so, can you post the stack trace/logcat entries. — CodingIntrigue
– CodingIntrigue, Commented Jul 31, 2013 at 10:18
Question[] is not a generic array. If you really mean Question[], then please change the title. — Vincent van der Weele
– Vincent van der Weele, Commented Jul 31, 2013 at 10:21
This code: codeQuestion[] q= (Question[]) getIntent().getExtras().getSerializable("questions"); Generates: 07-31 12:25:00.657: E/AndroidRuntime(25735): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.studentteech/com.example.studentteech.Domanda}: java.lang.ClassCastException: java.lang.Object[] cannot be cast to com.example.studentteech.Question[] — GiuseppeLabanca
– GiuseppeLabanca, Commented Jul 31, 2013 at 10:25

score 2 · Accepted Answer · 2013-07-31 11:29:30Z

2

this will be helpful.

 Question[] questions = (Question)context.getIntent().getExtras().get(key)

edited Jul 31, 2013 at 11:29

answered Jul 31, 2013 at 10:36

user2618291

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Comments

keerthana murugesan · Accepted Answer · 2013-07-31 10:49:20Z

0

Your objects need to implement the Parcelable interface.

In your Question class must implement parcelable interface. See the following code,

Question[] questions = //assign value;
Parcelable[] output = new Parcelable[questions.length];
for (int i=questions.length-1; i>=0; --i) {
    output[i] = questions[i];
}

Intent i = new Intent(...);
i.putExtra("QuestionArray", output);

//retreiving it from intent

Question[] questions = (Question[])intent.getParcelableArrayExtra("QuestionArray");

answered Jul 31, 2013 at 10:49

keerthana murugesan

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Comments

Lewis · Accepted Answer · 2013-07-31 10:51:14Z

In your first activity you can send the array inside a bundle and then in the next activity that was created with the intent you can extract the array list from the bundle.

        Bundle b=new Bundle();
        b.putStringArrayList("option", optionMod);
        Intent i = new Intent(getApplicationContext(), ad45.hw.hwapp.confirmation.class);
        i.putExtras(b);
        startActivity(i);

Then when you want to read the content in your new activity, create a new array List to store the one that was sent with the intent and extract the array from the bundle:

    public void getInfo(){
    Bundle extras = getIntent().getExtras();
    if (extras != null) {
       options = extras.getStringArrayList("option"); 
     }
    }

GiuseppeLabanca · Accepted Answer · 2016-02-18 20:01:19Z

0

Your Question object must implement the Parcelable interface. You can put only primitive objects or objects that implement Parcelable.

answered Feb 18, 2016 at 20:01

GiuseppeLabanca

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