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POHandler will not bind to main thread
 

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    <p>So my code seems to run just fine until it hits this line</p> <pre><code>adapter.notifyDataSetChanged(); </code></pre> <p>The error that pops up in the logcat is CalledFromWrongThreadException. The debug also shows the handler being run in the Background thread. How do I get the handler to bind to the main thread, and not the background one? I thought I just had to create the handler in the main thread, but I guess I am wrong, quite possible I am new to andriod. How do I fix this?</p> <pre><code>//Imports are included public class DirectoryActivity extends ListActivity { private ProgressDialog ProgressDialog = null; private ArrayList&lt;DirectoryListing&gt; listing = null; private DirectoryAdapter adapter; private Runnable viewOrders; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.directory); final Handler handler = new Handler() { @Override public void handleMessage(Message msg) { if (listing != null &amp;&amp; listing.size() &gt; 0) { adapter.notifyDataSetChanged(); for (int i = 0; i &lt; listing.size(); i++) adapter.add(listing.get(i)); Log.e("log_tag", "\nStill running\n"); } ProgressDialog.dismiss(); adapter.notifyDataSetChanged(); } }; listing = new ArrayList&lt;DirectoryListing&gt;(); adapter = new DirectoryAdapter(this, R.layout.rows, listing); setListAdapter(adapter); ProgressDialog = ProgressDialog.show(DirectoryActivity.this, "Please wait...", "Retrieving data ...", true); viewOrders = new Runnable() { @Override public void run() { listing = PreparePage.getArrayList(); handler.handleMessage(null); } }; Thread thread = new Thread(null, viewOrders, "Background"); thread.start(); } private static class PreparePage { protected static ArrayList&lt;DirectoryListing&gt; getArrayList() { ArrayList&lt;DirectoryListing&gt; listings = new ArrayList&lt;DirectoryListing&gt;(); JSONObject information = GetPageData.getJSONFromURL(url); Iterator key = information.keys(); while (key.hasNext()) { String id = (String) key.next(); JSONObject info = null; try { info = information.getJSONObject(id); } catch (JSONException e) { e.printStackTrace(); } String name = "", title = "", photo = ""; try { name = info.get("firstName") + " " + info.get("lastName"); title = info.getJSONObject("position").getString("name"); photo = info.optString("photoPath", "none"); } catch (JSONException e) { e.printStackTrace(); } listings.add(new DirectoryListing(name, title, photo)); } return listings; } } </code></pre> <p>}</p>
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