title: MaterialDatePicker error: materialCalendarFullscreenTheme attribute to be set in your app theme
body: <p>What I did:</p>
  
  <ol>
  <li>Added <code>implementation 'com.google.android.material:material:1.1.0'</code> in dependencies</li>
  <li>Set <code>Theme.MaterialComponents.Light.Bridge</code> as parent to app theme</li>
  </ol>
  
  <pre><code>     &lt;style name="AppTheme" parent="Theme.MaterialComponents.Light.Bridge"&gt;
          &lt;!-- Customize your theme here. --&gt;
          &lt;item name="colorPrimary"&gt;@color/colorPrimary&lt;/item&gt;
          &lt;item name="colorPrimaryDark"&gt;@color/colorPrimaryDark&lt;/item&gt;
          &lt;item name="colorAccent"&gt;@color/colorAccent&lt;/item&gt;
      &lt;/style&gt;
  </code></pre>
  
  <ol start="3">
  <li>Tried to show date picker in fragment.</li>
  </ol>
  
  <pre><code>MaterialDatePicker.Builder&lt;Pair&lt;Long, Long&gt;&gt; builder = MaterialDatePicker.Builder.dateRangePicker();
  
          Calendar now = Calendar.getInstance();
          now.set(Calendar.YEAR, 2020);
          now.set(Calendar.MONTH, 1);
          now.set(Calendar.DAY_OF_MONTH, 10);
  
          long first = now.getTimeInMillis();
  
          now.set(Calendar.YEAR, 2020);
          now.set(Calendar.MONTH, 5);
          now.set(Calendar.DAY_OF_MONTH, 20);
  
          long last = now.getTimeInMillis();
  
          builder.setSelection(new Pair&lt;&gt;(first, last));
  
          MaterialDatePicker&lt;Pair&lt;Long, Long&gt;&gt; picker = builder.build();
  
          picker.show(fragmentActivity.getSupportFragmentManager(), "RangePicker");
  </code></pre>
  
  <p><strong>When I ran the code, got this error</strong></p>
  
  <pre><code>java.lang.IllegalArgumentException: com.google.android.material.datepicker.MaterialDatePicker
  requires a value for the com.example:attr/materialCalendarFullscreenTheme attribute to be set
  in your app theme. You can either set the attribute in your theme or update your theme to
  inherit from Theme.MaterialComponents (or a descendant).
  </code></pre>