Save data between multiple activities

Question

First of all, sorry for newbie questions..

In my app I have two activities.

Activity A is in general a registration form with edittexts, autocompletetextviews, spinners and two buttons X and Y which leads to Activity B , practically a map activity. Applying startActivityForResult for button X I go to Activity B taking some data, then back to A ( onActivityResult ) then button Y leads with same procedure to Activity B and finally back to A.

The problems is that Activity A doesn't remember results from button X procedure when button Y ends its own.

Question1. Filling edittexts in activity A, going to activity B and back to A doesn't prevent activity A to hold this kind of data contrary to startActivityForResult and onActivityResult . Why is that;

Question 2: What is the proper way to save data from button X in activity A so that activity holds results both from the two button procedure when button Y finishes its own;

Thanks in advance..

any code that u would have tried ? plz post here? if not hv u tried shared pref? — KOTIOS, Aug 04 '14 at 08:22
You can go for the `ApplicationContext` to save data that can be used by multiple activities.. Also you can use any singleton pattern.. — Rushabh Patel, Aug 04 '14 at 08:23

score 0 · Answer 1 · answered Aug 04 '14 at 08:23

0

The proper way to send simple data between activies is using extras. Have a look at Android official documentation

answered Aug 04 '14 at 08:23

FKSI

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score 0 · Accepted Answer · answered Aug 04 '14 at 08:27

@FKSI is correct that the proper way to do this is using Intents Extras. However, I use Several Fragments inside each activity and when I have a mix of many activities and fragments all playing together AND if the data is not a lot, I find it very easy to use a SharedPreferences. Using getApplicationContext() as the Context, saving any SharedPreferences is accessible from anywhere in the package of the app.

score -1 · Answer 3 · answered Aug 04 '14 at 08:28

-1

If I dont misunderstand, you just want to save temp data. I recommend you to use Application class. An example can be found here: Example. Hope it helps.

answered Aug 04 '14 at 08:28

Kingfisher Phuoc

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As the link may get broken in future, you should include an example in your answer. Also, your answer suggests a bad practice, as counter-argued [here](http://stackoverflow.com/questions/19158339/python-why-are-global-variables-evil) – Marius Aug 04 '14 at 08:44
@Marius: this is subject to discussion. so just claiming that global variables are bad practice it is not enough. there are arguments for it and against it, practically as anything else. i personally find them useful in certain cases specifically from performance perspective. however, i agree that for this particular case not useful – eldjon Aug 04 '14 at 08:56
You answer a question and disagree with your own answer. – Marius Aug 04 '14 at 09:01
i did not answer any question. – eldjon Aug 04 '14 at 09:07
@Marius: 1st: Link is not broken yet, I checked it (It's just discussion, why need code?). 2nd: I dont think save everything to db is better idea. with some small things, it's not neccessary, that's why Application class exists. – Kingfisher Phuoc Aug 04 '14 at 09:09
Can anyone answer to question 1; I want to understand the logic behind that – user3649152 Aug 04 '14 at 11:57

Save data between multiple activities

3 Answers3