android accessing variables through classes

Question

I have this application with 2 classes, in the first class I define a list array wich I want to access in my second class, how do I do that? class one (with the array extends listActivity and the other class extends Activity). I don't think it's nessecary to post my code as I believe there is a quick solution to this I just don't know it. Allthough I can post it if you can't help me without seeing the actual code.

http://androidideasblog.blogspot.in/2010/02/passing-list-of-objects-between.html — Samir Mangroliya, Mar 22 '12 at 18:06
Seems to me like these examples all require me to make a class that implements parcelable? but I need to send my entire array from a listactivity class to an activity class, don't find anything here that works.. :( — jlodenius, Mar 22 '12 at 18:36

score 1 · Answer 1 · edited May 23 '17 at 11:48

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You can use a custom ApplicationContext to share global state between activities - see here for more details...

edited May 23 '17 at 11:48

Community

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answered Mar 22 '12 at 20:16

Paul Drummond

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score 0 · Accepted Answer · edited Mar 23 '12 at 05:47

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you can pass ArrayList<String> 's across activities using intentExtras.

 ArrayList<String> myArrayList = new ArrayList<String>();
 // populate your array  -> if you want to send objects make a string form of them

 Intent myIntent = new Intent(this, Activit2.class);
 mtIntent.putStringArrayList("my_array_list", myArrayList);

In Activity2

Intent intent = getIntent();
 List<String> stringMediaList = intent.getStringArrayListExtra("my_array_list");

for (int i = 0; i < stringMediaList.size(); i++) {
   //reconstruct object if needed
}

this will work if you dont want to use parcelable

edited Mar 23 '12 at 05:47

Alex Lockwood

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answered Mar 22 '12 at 19:56

Laith Alnagem

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Thanks alot man! worked great, just a last question though if you see this. How can I pass an int to another class? (no intArray just a regular int) there should be a similar way right? – jlodenius Mar 22 '12 at 20:18
Yes, myIntent.putIntegerArrayListExtra("my_integer_array", value) where value is a ArrayList. For regular int's use myIntent.putExtra("my_int" , 9001); – Laith Alnagem Mar 23 '12 at 02:26

android accessing variables through classes

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