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    <p>You have a few options:</p> <p>Define your own custom <code>AsyncTask</code> class and pass the <code>List</code> that you want filled into either its constructor:</p> <pre class="lang-java prettyprint-override"><code>class MyAsyncTask extends AsyncTask&lt;Void,Void,Void&gt; { private List&lt;LatLng&gt; mTheList; public MyAsyncTask(List&lt;LatLng&gt; theList) { mTheList = theList; } // fill the list in doInBackground() ... } // in your fragment MyAsyncTask task = new MyAsyncTask(theList); task.execute(); </code></pre> <p><strong>OR</strong> you can pass it as a parameter to the <code>execute()</code> method:</p> <pre><code>class MyAsyncTask extends AsyncTask&lt;List&lt;LatLng&gt;,Void,Void&gt; { public Void doInBackgroun(List&lt;LatLng&gt;...args { List&lt;LatLng&gt; theList = args[0]; // fill the list } } </code></pre> <p>Note that you can also pass the <code>Fragment</code> instance to the <code>execute()</code> method in the same way and then call the <code>getList()</code> method on that instance (I don't like this option).</p> <p>A better option would be:</p> <p>Create the list object in your custom <code>AsyncTask</code> class, and then return it back to the <code>Fragment</code> in the <code>postExecute()</code> method. You can do this by directly calling a method on the <code>Fragment</code> instance (that you'll get either via the constructor or as an argument to the <code>execute()</code> method) that accepts the list as a parameter. But, another (cleaner) way is to define an interface within your custom <code>AsyncTask</code> class for a callback method that accepts the filled list as an argument. Then your <code>Fragment</code> can implement this callback interface, add itself to the task as a "listener", and have the task call that inteface method, passing the filled list as an agrument inside the task's <code>postExecute()</code> method.</p>
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    1. POAccessing fragment method from async task
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    1. POAccessing fragment method from async task
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    1. COI pass in a class that includes a list of polyline options and a list of marker options. In the result of the class I call a method to add the polyline options and the markers to the map
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    2. CO@unluddite, i tried your first two options but still cannot get any items in the list before the next activity the needs the list is called. Do you mind if you place a sample code of how to implement the last option you suggested?
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    3. COBased on your response, it doesn't sound like the last option would help you any. The options are all achieving the same result--fill a list in an `AsyncTask` and deliver the result back to the caller--but just use different style/design. I think you need to elaborate more on what you mean by: _cannot get any items in the list before the next activity the needs the list is called_. If you need to wait for the `AsyncTask` result, then don't start the next activity until `onPostExecute()` runs.
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