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POhow to use asynctask in android-support-v4.jar Fragment?
 

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  1. POhow to use asynctask in android-support-v4.jar Fragment?
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    <p>I have a TabActivity which has two tabs. I load separate Activity in each tab (Activity <strong>A</strong> &amp; <strong>B</strong>). Activity A, which is loaded in tab 1 has <strong>some controls</strong> and a <strong>ListView</strong>. I use <strong>AsyncTask</strong> to load data from a web service for that <strong>ListView</strong>. I had to load another activity when user clicked on ListView item, but that new Activity <strong>C</strong> should be loaded in same selected Tab.</p> <p>I searched on internet and found that i can use <strong>ActivityGroup</strong> ... but at the same time,i found that its deprecated. So using android-support-v4 compatibility <strong>Frangment</strong> were proposed..</p> <p>I downloaded that <strong>android-support-v4.jar</strong> and looked at the <strong>FragmentTabs</strong> sample, I got it how can i use Fragments even in Android 2.1.... so i replaced the two <strong>Activities</strong>, which i was showing in tabs, with two <strong>Fragments</strong></p> <p>But now I dont know how to handle the follow situations:</p> <ol> <li><p>ListView &amp; Other controls does not show when i run the following code.</p></li> <li><p>i have to call AsyncTask ... it will take time to get &amp; parse XML data from the server and Fragment's <strong>onCreateView</strong> is called earlier ... so how can i set the <strong>ListView</strong> in fragment after its <strong>onCreateView</strong> is called?</p></li> <li><p>After ListView item is clicked, i will have to load another fragment <strong>C</strong> within that same <strong>tab</strong> ... how can i achieve this?</p></li> </ol> <p>Code for my Fragment is as follows: </p> <pre><code>public class UpdatesFragment extends Fragment implements IFeedReceiver { ArrayList&lt;Feed&gt; _feeds; Integer _currentPage = 1; ListView _lvUpdates; UserMessage _userMessage; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getFeeds(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.updates, container, false); this._lvUpdates = (ListView)v.findViewById(R.id.listUpdates); return v; } private void getFeeds() { FeedsCollectorAsyncTask task = new FeedsCollectorAsyncTask( getActivity(), this._currentPage); task.execute(); } //This method is called from AsyncTask upon receiving &amp; parsing data. So i m trying to populate my ListView here @Override public void onFeedReceived(ArrayList&lt;Feed&gt; feeds) { FeedsAdapter adapter = new FeedsAdapter(getActivity(), R.layout.feed_list_item, this._feeds); this._lvUpdates.setAdapter(adapter); // Load detail on item click this._lvUpdates.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; arg0, View arg1, int index, long id) { } }); } </code></pre> <p>}</p> <p>Main Tab Activity XML is as follows. </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="5dp"&gt; &lt;FrameLayout android:id="@android:id/tabcontent" android:layout_width="0dp" android:layout_height="0dp" android:layout_weight="0"/&gt; &lt;FrameLayout android:id="@+android:id/realtabcontent" android:layout_width="fill_parent" android:layout_height="0dp" android:layout_weight="1"/&gt; &lt;TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="-6dp"/&gt; &lt;/LinearLayout&gt; </code></pre> <p></p> <p>And finally ... </p> <pre><code>public class PlayMakerActivity extends FragmentActivity { /** Called when the activity is first created. */ TabHost tabHost; TabManager mTabManager; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Resources res = getResources(); // Resource object to get Drawables // TabHost tabHost = getTabHost(); // The activity TabHost tabHost = (TabHost) findViewById(android.R.id.tabhost); tabHost.setup(); mTabManager = new TabManager(this, tabHost, R.id.realtabcontent); mTabManager.addTab(tabHost.newTabSpec("Upudates").setIndicator("Updates"), UpdatesFragment.class, null); } } //also included the following AS It IS public static class TabManager implements TabHost.OnTabChangeListener { .... .... .... } </code></pre> <p>You can point me to some example. Your help is greatly appreciated!.</p>
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    1. USAamir
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