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copied!<blockquote> <p>I cannot show much of the code, but I do standard Fragment attachment and then create a thread in the fragment with a specific sleep period and then updating the seekbar progress on ui-thread.</p> </blockquote> <p>Try using a <code>Handler</code> to update the <code>ProgressBar</code>:</p> <p>Define the following global variables:</p> <pre><code>Handler updateHandler; // loop control variable boolean shouldStop; Runnable updateRunnable; </code></pre> <p>Initialize variables:</p> <pre><code>updateHandler = new Handler(); shouldStop = false; updateRunnable = new Runnable() { @Override public void run() { if (!shouldStop) { // Post this Runnable again with a delay of 1000 milliseconds updateHandler.postDelayed(this, 1000L); // Update ProgressBar updateCallback(Your_Progress_Value); } } }; // Start the update process updateHandler.post(updateRunnable); </code></pre> <p>And you do not need to specify the thread to run the update on in this case:</p> <pre><code>/* Called every 1 sec */ void updateCallback(final int progress) { if (seekBarView == null) { seekBarView = (SeekBar) view.findElementById(R.id.progressBar); } seekBarView.setProgress(...); } </code></pre> <p>The <code>boolean</code> variable <code>shouldStop</code> will be used when you need to end the update process. Set it to <code>true</code> and the updates will stop.</p> <p>Note: You have a <code>ProgressBar</code> widget in your layout and your code uses a <code>SeekBar</code>. Could you make that correction in your post? Another thing, there's no method with signature <code>findElementById(int)</code> in <code>View</code>. Is this your actual code?</p>

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