multiple root tags at RecyclerView : <p>I  working on Android app in Android Studio, I was confronted with the error:  "multiple root tags"</p>

<p>My application code:</p>

<pre><code>&lt;? Xml version = "1.0" encoding = "utf-8"?&gt; 
&lt;LinearLayout 
xmlns: android = "http://schemas.android.com/apk/res/android" 
xmlns: tools = "http: // schemas .android.com / tools 
"android: layout_width =" match_parent 
"android: orientation =" vertical 
"android: layout_height =" match_parent 
"android: paddingLeft =" @ dimen / activity_horizontal_margin 
"android: paddingRight =" @ dimen / activity_horizontal_margin 
"android: paddingTop = "@ dimen / activity_vertical_margin" android: paddingBottom = "@ dimen / activity_vertical_margin" tools: context = ". MainActivity"&gt;

    &lt;Android.support.v7.widget.RecyclerView 
android: id = "@ + id / recyclerView" 
android: layout_width = "wrap_content" 
android: layout_height = "wrap_content" 
android: layout_marginLeft = "20dp" 
android: paddingLeft = "40dp"&gt; 
&lt;/android.support.v7.widget.RecyclerView&gt;

&lt;/ LinearLayout&gt;
</code></pre>

<p>...
How do I fix this error hands?
Thankful</p>
