Force close by ActivityManager while fatal in a separate thread
<p>My Activity was forcefully closed by activity manager. I found following line in logcat:</p>

<blockquote>
  <p>W ActivityManager:   Force finishing activity com.something.something</p>
</blockquote>

<p>while analyzing logs I found </p>

<blockquote>
  <p>E AndroidRuntime: FATAL EXCEPTION: main</p>
  
  <p>E AndroidRuntime: java.lang.IllegalArgumentException:...........</p>
</blockquote>

<p>this exception was in a separate thread then why did ActivityManager stopped my activity.
It would be better if one can explain what are the possible reasons for force close.</p>
