title: view tag isn't correct on view:null
body: <p>I'm using android data bindings and also using <a href="https://github.com/ppamorim/Dragger" rel="nofollow">Dragger</a> the problem is when I do this</p>
  
  <pre><code>MyLayoutbinding = DataBindingUtil.setContentView(this, R.layout.my_Layout);
  </code></pre>
  
  <p>I got the error</p>
  
  <pre><code>Caused by: java.lang.RuntimeException: view tag isn't correct on view:null                                                                          
     at com.rkmax.myapp.databinding.MyLayoutBinding.bind(MyLayoutBinding.java:191)
     at android.databinding.DataBinderMapper.getDataBinder(DataBinderMapper.java:15)
     at android.databinding.DataBindingUtil.bind(DataBindingUtil.java:185)
     at android.databinding.DataBindingUtil.bindToAddedViews(DataBindingUtil.java:299)
     at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:279)
     at android.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:261)
     at com.rkmax.myapp.MyActivity.onCreate(MyActivity.java:26)
  </code></pre>
  
  <h2>my_layout.xml</h2>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;layout xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;data&gt;
          &lt;import type="android.graphics.drawable.Drawable" /&gt;
          &lt;variable name="indicatorBg" type="Drawable" /&gt;
          &lt;variable name="categoryName" type="String" /&gt;
          &lt;variable name="progress" type="int" /&gt;
      &lt;/data&gt;
  
      &lt;RelativeLayout android:orientation="vertical"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:background="@drawable/bg_blackboard"&gt;
  
          &lt;ProgressBar
                      style="?android:attr/progressBarStyleHorizontal"
                      android:layout_width="match_parent"
                      android:layout_height="15.3dp"
                      android:id="@+id/progressBar2"
                      android:max="10"
                      android:progress="@{progress}" /&gt;
  
  
      &lt;/RelativeLayout&gt;
  &lt;/layout&gt;
  </code></pre>