How to take Data from Intent in Android

Question

Hello everyone, I need to take parameter id = 55 from this picture, does anyone know how to do that? Thanks!!

System.out.println(voznja.toString());

When I try to log in console, I always get the error that object reference is null.

Could you post code snippet and logcat in here? – Daniel.Wang Feb 01 '21 at 11:37 — Daniel.Wang, Feb 01 '21 at 11:37
@Daniel.Wang yes i can – Nikola Stankovic Feb 01 '21 at 11:42 — Nikola Stankovic, Feb 01 '21 at 11:42
okay, Please update your question. – Daniel.Wang Feb 01 '21 at 11:47 — Daniel.Wang, Feb 01 '21 at 11:47

Litva Nick · Accepted Answer · 2021-02-02T19:03:22.043

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When you call extras.getString("voznja") it returns null because voznja is not a String. Its class is Voznja so you have to write your code like this:

Voznja voznja = (Voznja) extras.getSerializableExtra("voznja");

Now you can get the id by this line:

voznja.get("id");

edited Feb 02 '21 at 19:03

answered Feb 01 '21 at 17:54

Litva Nick

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https://stackoverflow.com/questions/65994815/debugger-doesnt-enter-into-the-onpostexecute-method-in-android Please take a look a this question, i need help here. Thanks – Nikola Stankovic Feb 02 '21 at 10:08
Oh, I don't think I can help here. You can search for some information here: https://stackoverflow.com/questions/3606505/onpostexecute-not-called-after-completion-asynctask – Litva Nick Feb 02 '21 at 16:44

score 0 · Answer 2 · 2021-02-01T11:52:31.460

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I think that the id you are trying to read is in an object. I would first suggest using : voznja = extras.getSerializableExtra("voznja")
Then, I would use this to extract the id from the object :
voznja.get(0);
let me know if that helps

edited Feb 01 '21 at 11:52

answered Feb 01 '21 at 11:37

Thanks, but that is not answer :( – Nikola Stankovic Feb 01 '21 at 11:41
That is the answer, please edit your answer here so i can accept it. THANKS!! – Nikola Stankovic Feb 01 '21 at 11:50
https://stackoverflow.com/questions/65994815/debugger-doesnt-enter-into-the-onpostexecute-method-in-android Please look at this question, i need help here. Thanks. – Nikola Stankovic Feb 02 '21 at 10:08

score 0 · Answer 3 · answered Feb 01 '21 at 11:52

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If your class implements Parcelable use:

Voznja voznja = extras.getParcelableExtra("voznja");

And if it implements Serializable use:

Voznja voznja = extras.getSerializableExtra("voznja");

And then you could get the id from your object.

answered Feb 01 '21 at 11:52

Stoyan Milev

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How to take Data from Intent in Android

3 Answers3