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copied!<p>Please be aware that every time you change the orientation, a new instance of your <code>Activity</code> (and consequently of your <code>Dialog</code> via <code>onCreateDialog</code>) is created. You can verify this by adding a log statement in either constructor.</p> <p>Although difficult to say without having a glance at your code, I'm guessing you're calling <code>dismissDialog</code> on an older instance of your <code>Activity</code>.</p> <p>Consider the following <code>Activity</code> that simply shows an empty <code>Dialog</code> when a button is clicked and starts a <code>TimerTask</code> to dismiss it after 10 seconds:</p> <pre><code>public class Test extends Activity { private Dialog dialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.test); Button btn = (Button) findViewById(R.id.testButton); btn.setOnClickListener(new OnClickListener() { public void onClick(View v) { new Timer().schedule(new TimerTask() { @Override public void run() { dialog.dismiss(); } }, 10000); Test.this.showDialog(1); } }); } @Override protected Dialog onCreateDialog(int id) { if(id == 1) { if(dialog == null) { dialog = new Dialog(this); } return dialog; } return super.onCreateDialog(id); } } </code></pre> <p>This code has a problem similar to the one you're describing: If - during the 10 seconds - the orientation is changed, the <code>Dialog</code> is never dismissed. <em>Why?</em> Because at the time the <code>TimerTask</code> is <code>run</code>, a whole different set of <code>Test</code> and <code>Dialog</code> instances has been created (during orientation change) and the <code>TimerTask</code>'s <code>dialog</code> instance variable references a <code>Test</code> instance that is different from the one that is currently active on the screen.</p> <p>Obviously there are several ways to deal with this issue (mostly depending on your application), one quick (dirty?) way to fix the above code would be to simply make the <code>dialog</code> field <code>static</code>:</p> <pre><code>private static Dialog dialog;</code></pre>

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