                        課程
                    
                        /移動開發
                        
                            /Android
                        
                        /千變萬化的ViewPager切換動畫

提示錯誤：The markup in the document following the root element must be well-formed.

<RelativeLayout?xmlns:android="http://schemas.android.com/apk/res/android"
????xmlns:tools="http://schemas.android.com/tools"
????android:id="@+id/container"
????android:layout_width="match_parent"
????android:layout_height="match_parent"?/>
	
	<android.support.v4.view.ViewPager
	????android:id="@+id/id_viewpager"
	????android:layout_width="match_parent"
	????android:layout_height="match_parent">
	</android.support.v4.view.ViewPager>

</RelativeLayout>

出錯提示行在：<android.support.v4.view.ViewPager

求解決方法