What is the name of this element

Add to the layout:

<android.support.v4.view.ViewPager android:id="@+id/photos_viewpager" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.design.widget.TabLayout android:layout_width="match_parent" android:layout_height="wrap_content"/> 

In activit:

 ViewPager pager = (ViewPager) view.findViewById(R.id.photos_viewpager); PagerAdapter adapter = new PhotosAdapter(getChildFragmentManager(), photosUrl); pager.setAdapter(adapter); TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tab_layout); tabLayout.setupWithViewPager(pager, true); 

Create points: 1) selected_dot.xml

 <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:innerRadius="0dp" android:shape="ring" android:thickness="8dp" android:useLevel="false"> <solid android:color="@color/colorAccent"/> </shape> </item> 

2) default_dot.xml

 <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:innerRadius="0dp" android:shape="ring" android:thickness="8dp" android:useLevel="false"> <solid android:color="@android:color/darker_gray"/> </shape> </item> 

3) tab_selector.xml

 <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/selected_dot" android:state_selected="true"/> <item android:drawable="@drawable/default_dot"/> 

And add points to TabLayout :

 app:tabBackground="@drawable/tab_selector" app:tabGravity="center" app:tabIndicatorHeight="0dp"