title: Android Studio can't see TextView ID
body: <p>I have a textview, the xml file is</p>
  
  <pre><code>&lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="30dp"
          android:fontFamily="sans-serif"
          android:lineSpacingExtra="30sp"
          android:text="MyText"
          android:textColor="?android:attr/colorActivatedHighlight"
          android:textSize="18sp"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintLeft_toLeftOf="parent"
          app:layout_constraintRight_toRightOf="parent"
          app:layout_constraintTop_toTopOf="parent"
          app:layout_constraintVertical_bias="0.22000003" /&gt;
  </code></pre>
  
  <p>There is no ID of this textview so I can't use it in MainActivity.java, I just started Android Studio(I worked with Python so far) what am I missing?</p>
  
  <p>I have also a button and it has an <strong>id</strong>.</p>