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    <p>Consider this Task (where R.id.test refers to a valid view in my activity's layout):</p> <pre><code>public class LongTaskTest extends AsyncTask&lt;Void, Void, Void&gt;{ private WeakReference&lt;Activity&gt; mActivity; public LongTaskTest(Activity a){ mActivity = new WeakReference&lt;Activity&gt;(a); } @Override protected Void doInBackground(Void... params) { LogUtil.d("LongTaskTest.doInBackground()"); SystemClock.sleep(5*60*1000); LogUtil.d("mActivity.get()==null " + (mActivity.get()==null)); LogUtil.d("mActivity.get().findViewById(R.id.frame)==null " + (mActivity.get().findViewById(R.id.test)==null)); return null; } } </code></pre> <p>If I run this task from an Activity's onCreate like so:</p> <pre><code>public class Main extends Activity { @Override public void onCreate(Bundle state) { super.onCreate(state); setContentView(R.layout.testlayout); new LongTaskTest(this).execute(); finish(); } } </code></pre> <p>No matter how long I sleep the background thread, my log always shows:</p> <pre><code>LongTaskTest.doInBackground() mActivity.get()==null false mActivity.get().findViewById(R.id.frame)==null false </code></pre> <p>Which is to say that the activity and its views appear to stay alive (even if I manually issue GCs via DDMS). If I had more time I'd look at a memory dump, but otherwise I don't really know <em>why</em> this is the case ... but in answer to your questions it appears that:</p> <ul> <li>Does it silently fail? No </li> <li>Does it produce any exception? No</li> <li>Will the user be notified that something has gone wrong? No</li> </ul>
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    1. POWhat happens to an AsyncTask when the launching activity is stopped/destroyed while it is still running?
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    1. COThe activity may still be there because your inner class has a reference to it, but how about the views and instance variables in it?
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    2. COThat's why I used a WeakReference to Activity ... to ensure that my inner class wasn't the reason Activity was kept alive. As to views and instance variables, my inner class has none except for the WeakReference to Activity. Unless you mean something else? more on WeakReference: http://developer.android.com/reference/java/lang/ref/WeakReference.html
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    3. CO@newbyca If in fact `LongTaskTest` is an inner class, then it has an implicit reference to Activity that you are forgetting - make it a static nested class: http://stackoverflow.com/questions/70324/java-inner-class-and-static-nested-class
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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.

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