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I have a toolbar. And spinner that set on it. Now this spinner is strongly integrated in my code. So I prefer not change the structure mentioned down. Now the problem is that I have to store array in the resources. This is the problem because I want to programatically add/(delete) items that stored there. So the question is: If it is possible to prepare this array in activity?(and store ready array into resources) Or if is possible to add/delete specific item to array that locate into resources?

toolbar = (Toolbar) findViewById(R.id.toolbar);
SpinnerAdapter spinnerAdapter = ArrayAdapter.createFromResource(getApplicationContext(), R.array.category, R.layout.spinner_dropdown_item);
            Spinner navigationSpinner = new Spinner(getSupportActionBar().getThemedContext());
            navigationSpinner.setAdapter(spinnerAdapter);
            toolbar.addView(navigationSpinner, 0);

This is how array looks like. 

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="category">
        <item>All lists</item>
        <item>Default</item>
        <item>Finished</item>
        <item>New List</item>
    </string-array>
</resources>

I found part of answer. But this allows only getting data from there, and not to store it after the treatment. How to add items to a stringArray in an arrayList programmatically?

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  • You can modify the in-memory array. But you can't save it in your resources. Commented Jan 27, 2017 at 22:21
  • "modify the in-memory array" what do you mean? Commented Jan 27, 2017 at 22:22
  • You will read the array into an object, right? OK, you can copy that and add or remove items to THAT one. But you can't save the updates to a file in the resources folder. The resources folder is untouchable. Commented Jan 27, 2017 at 22:24
  • ArrayAdapter.createFromResource calls a method, what creates an in-memory array (see line 391, or line 204 here) Commented Jan 27, 2017 at 22:31
  • It means rewrite... Thanks Commented Jan 27, 2017 at 22:43
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