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POHow do I pass along context from MenuItem onOptionsItemSelected to ASyncTask?
 

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  1. POHow do I pass along context from MenuItem onOptionsItemSelected to ASyncTask?
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    <p>Edit: The question in one line: </p> <blockquote> <p>How to pass along context from a MenuItem onOptionsItemSelected?</p> </blockquote> <p>Edit 2: Here is a global indication of what I'm doing: <a href="https://github.com/JakeWharton/ActionBarSherlock/blob/master/samples/fragments/src/com/actionbarsherlock/sample/fragments/FragmentTabsPager.java" rel="nofollow noreferrer">https://github.com/JakeWharton/ActionBarSherlock/blob/master/samples/fragments/src/com/actionbarsherlock/sample/fragments/FragmentTabsPager.java</a></p> <hr> <p>I'm building an app based on ActionBarSherlock. It uses tabs, fragments and a viewpager. It's meant to be as versatile as possible. A tab can either contain a webview, or a listview. Here's a screenshot:</p> <p><img src="https://i.stack.imgur.com/LST1u.png" alt="http://dl.dropbox.com/u/11218283/Screenshot_2012-05-16-13-33-08.png"></p> <p>When the tab (SherlockListFragment) is first loaded, it reads content from a feed using an ASyncTask. OnPostExecute it updates the list and saves the result to a SharedPreference string (as a way of caching). As you can imagine, the AsyncTask requires context to do this. I'm calling the asynctask from the SherlockListFragment like this:</p> <pre><code>x.new refreshList(this,getActivity()).execute(); </code></pre> <p>(x being a reference to my current file).</p> <p>And transfer it to my AsyncTask like this</p> <pre><code> public refreshList(TabList a,Context b){ this.mContext = a; this.mCont = b; } </code></pre> <p>All that works fine. But as you can see I've added in a menu item for refreshing. The way I've set things up, I'm not capable of re-running the ASyncTask, since I haven't got the appropriate context information. Can anyone tell me how to perform a refresh in this situation?</p> <p>If anyone willing to help requires to see more code, I'll gladly comply.</p> <p>Thanks in advance.</p>
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      1. POHow do I pass along context from MenuItem onOptionsItemSelected to ASyncTask?
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      1. POHow do I pass along context from MenuItem onOptionsItemSelected to ASyncTask?
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    1. COWouldn´t it be a better idea to make a callback method in SherlockListFragment and call that from onPostExecute? That way you will separate the code that belongs to the user interface and the code that does the asynchronous loading of data. Solves your problem as well.
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      1. USThomas
    2. COYou said you are responding to the button in onOptionsItemSelected, so the context is just `this` if you are doing it in the Activity. If in a fragment it is `getActivity()`. Am I missing something?
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      1. POHow do I pass along context from MenuItem onOptionsItemSelected to ASyncTask?
      1. USJason Hanley
    3. CO@Thomas I see what you mean, but wouldn't that still require a context? How else would the ASyncTask know which tab to update? There may be three instances of the tab, which one would update if I did it that way?
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