title: Start Activity with NFC in a specific task
body: <p>My app contains a number of activities. One of these activities responds to an NFC intent filter, as well as standard intents, however, this activity is launching in it's own task, and not in the same task as the app. The app is not necessarily running when the NFC intent is initiated but if it is, I want the activity to launch in the same task to ensure a seamless user experience. At the moment, the app is behaving as though there are 2 of them running.</p>
  
  <p>Here is the manifest for my NFC activity:</p>
  
  <pre><code>&lt;activity
          android:name="name.subname.app.activity.ItemSummaryActivity"
          android:label="@string/title_activity_item_summary" &gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.nfc.action.NDEF_DISCOVERED" /&gt;
  
              &lt;data android:mimeType="application/vnd.name.nfcdemo" /&gt;
  
              &lt;category android:name="android.intent.category.DEFAULT" /&gt;
  
              &lt;data android:mimeType="text/plain" /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  </code></pre>
  
  <p>Is it possible to launch the activity in the existing task, if it exists?</p>