title: My android application is not one of the default application when i scan an nfc tag
body: <p>I have a problem with the intent filters.</p>
  
  <p>I want to write an application that could read all the nfc tags available by android and i don't understand why my application is not visible by the system when i scan a tag... Indeed, the system offers me the possibilty to launch the others applications i have installed but not my application.</p>
  
  <p>Here is the my manifest.xml : </p>
  
  <pre><code>&lt;uses-permission android:name="android.permission.NFC" /&gt;
  
  &lt;uses-feature
      android:name="android.hardware.nfc"
      android:required="true" /&gt;
  &lt;application 
  ...
     &lt;activity
          android:name=".read.ReadActivity"
          android:label="NfcSamples" 
          android:launchMode="singleTask"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.nfc.action.NDEF_DISCOVERED" /&gt;
              &lt;category android:name="android.intent.category.DEFAULT" /&gt;
          &lt;/intent-filter&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.nfc.action.TECH_DISCOVERED" /&gt;
          &lt;/intent-filter&gt;
          &lt;meta-data
              android:name="android.nfc.action.TECH_DISCOVERED"
              android:resource="@xml/filter_nfc" /&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.nfc.action.TAG_DISCOVERED" /&gt;
  
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  &lt;/application&gt;
  </code></pre>
  
  <p>I precise that I don't want to launch specifics tags but read all the tags availables.</p>
  
  <p>What do I missed ?</p>