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    <pre><code>public void extractFiles() { new TheTask().execute(params); } class TheTask extends AsyncTask&lt;Void,Void,Void&gt; { ....... } </code></pre> <p>You should call super first in</p> <pre><code> @Override protected void onPreExecute() super.onPreExecute(); } </code></pre> <p>Asynctask must be loaded on UI Thread. Asynctask onPreExecute() is inovked on the ui thread when asynctask is loaded. After which doInBAckground() is runs in the background thread. The result of doInBackground() is a parameter to onPostExecute().</p> <p>When an asynchronous task is executed, the task goes through 4 steps:</p> <ol> <li><p><strong>onPreExecute(), invoked on the UI thread before the task is executed</strong>. This step is normally used to setup the task, for instance by showing a progress bar in the user interface.</p></li> <li><p><strong>doInBackground(Params...), invoked on the background thread immediately after onPreExecute() finishes executing</strong>. This step is used to perform background computation that can take a long time. The parameters of the asynchronous task are passed to this step. The result of the computation must be returned by this step and will be passed back to the last step. This step can also use publishProgress(Progress...) to publish one or more units of progress. These values are published on the UI thread, in the onProgressUpdate(Progress...) step.</p></li> <li><p>onProgressUpdate(Progress...), invoked on the UI thread after a call to publishProgress(Progress...). The timing of the execution is undefined. This method is used to display any form of progress in the user interface while the background computation is still executing. For instance, it can be used to animate a progress bar or show logs in a text field.</p></li> <li><p><strong>onPostExecute(Result), invoked on the UI thread after the background computation finishes</strong>. The result of the background computation is passed to this step as a parameter.</p></li> </ol> <p><a href="http://developer.android.com/reference/android/os/AsyncTask.html" rel="nofollow">http://developer.android.com/reference/android/os/AsyncTask.html</a></p>
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    1. POonPostExecute called before doInBackground completes - Async task
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      1. VTUpMod
    1. COthanks but where am i going wrong here ? can you please tell me
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      1. USGoofy
    2. COsee the above you need to call super first in onPreExecute(). also call asynctask like above inside the extractFiles()
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      1. USRaghunandan
    3. COok will check that and get back here
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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