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POAndroid Cannot execute setListAdapter() user thread
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  1. POAndroid Cannot execute setListAdapter() user thread
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    copied!<p>Sorry my last question was not well formated. So I am deleting the content and re framing my question.</p> <p>I liked @ChrisBunney answer to my question with an example to process image in another thread.</p> <p>Here is proper code below</p> <pre><code>public class TestActivity extends ListActivity { int count =0; List&lt;String&gt; listString = null; String[] mString = null; private RefreshHandler mRedrawHandler = new RefreshHandler(); class RefreshHandler extends Handler { @Override public void handleMessage(Message msg) { TestActivity.this.updateUI(); } public void sleep(long delayMillis) { this.removeMessages(0); sendMessageDelayed(obtainMessage(0), delayMillis); } }; private void updateUI(){ mRedrawHandler.sleep(1000); listString.add("Test "+count++); String[] mString = new String[listString.size()]; int i = 0; for(String string : listString){ mString[i++]= string; } if(null != mString &amp;&amp; mString.length&gt;0) setListAdapter(new ArrayAdapter&lt;String&gt;(this,android.R.layout.simple_list_item_1,mString )); } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); listString = new LinkedList&lt;String&gt;(); updateUI(); } } </code></pre> <p>What I intend to do is call UI update from another thread.</p> <p>This will be the modification to my above code file.</p> <pre><code>private class HelperClass implements Runnable{ public void run() { performSomeCalculation(); } /* * This code will populate the list as it is executed. * As and when there is a new element in the list the UI is updated. */ public void performSomeCalculation(){ //update list String updateUI(); } /* /* * * The new update onCreate method calling another thread that populates the UI thread * */ @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); listString = new LinkedList&lt;String&gt;(); //updateUI(); Thread thread = new Thread(new HelperClass()); thread.start(); } </code></pre> <p>You can see in the above code I have created a HelperClass to perform some calculation , as and when there is ouput from the calculation thread it should update the UI thread.</p> <p>I am working on it to make it work, if any one figures out plz update my post.</p> <p>Thanks in advance.</p>
 

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