title: Why cannot set background to match_parent?
body: <p>I want to set background to match their parent like this image.</p>
  
  <p><a href="https://i.stack.imgur.com/VSytd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VSytd.png" alt=""></a></p>
  
  <p>But it cannot and appears as below.</p>
  
  <p><a href="https://i.stack.imgur.com/OKyNF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OKyNF.png" alt=""></a></p>
  
  <p>Layout code is here:</p>
  
  <pre><code>&lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="horizontal"
              android:background="@drawable/stepbar_bg"&gt;
                  &lt;TextView
                      android:layout_width="wrap_content"
                      android:layout_height="match_parent"
                      android:text="@string/M01_01"
                      android:textSize="14sp"
                      android:gravity="center|center_vertical"
                      android:textColor="#ffffff"
                      android:background="@drawable/step_1_bg"/&gt;
  &lt;/LinearLayout&gt;
  </code></pre>