title: How to change primary and primaryDark color?
body: <p><strong>current layout</strong></p>
  
  <p><img src="https://i.stack.imgur.com/rCx0p.jpg" alt="main layout view image"></p>
  
  <p>I have a problem related to xml layout, and I don't know how to add primary and primary dark color. Can anybody help me?</p>
  
  <p><strong>main.xml</strong></p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="vertical"
          android:layout_width="match_parent"
          android:layout_height="match_parent" &gt;
        &lt;ListView android:id="@+id/in"
                  android:layout_width="match_parent"
                  android:layout_height="match_parent"
                  android:stackFromBottom="true"
                  android:transcriptMode="alwaysScroll"
                  android:layout_weight="1"/&gt;
  
        &lt;LinearLayout
          android:orientation="horizontal"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"&gt;
          &lt;EditText android:id="@+id/edit_text_out"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:layout_gravity="bottom"/&gt;
          &lt;Button android:id="@+id/button_send"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:text="@string/send"/&gt;
      &lt;/LinearLayout&gt;
  &lt;/LinearLayout&gt;  
  </code></pre>
  
  <p><strong>How it should look like</strong></p>
  
  <p><img src="https://i.stack.imgur.com/bVcMT.jpg" alt="Need this layout"></p>