CircularPagerIndicator is usually a kind of indicator that used to know how many images or tabs are left in our view. It is like a dot at the bottom of a view, more you can get by implementing below few lines in your project.

Step1: permission needed to add indicator

compile 'com.mcxiaoke.viewpagerindicator:library:2.4.1'

Step2: Use a layout file having viewPager and CirclePageIndicator

<android.support.v4.view.ViewPager
            android:id="@+id/pager"
            android:layout_width="match_parent"
            android:layout_height="@dimen/one_eighty_dp">

        </android.support.v4.view.ViewPager>

        <com.viewpagerindicator.CirclePageIndicator
            android:id="@+id/indicator"
            android:layout_width="match_parent"
            android:layout_height="25dp"
            android:layout_marginTop="-30dp"
            android:padding="@dimen/ten_dp"
            app:fillColor="#88FF0000"
            app:pageColor="@android:color/white"
            app:radius="@dimen/five_dp"
            app:strokeWidth="2dp" />

Step3: Now getting CircularPageIndicator id and attaching it to the pager.

ViewPager pager = (ViewPager) view.findViewById(R.id.pager);
	pager.setAdapter((new ImageSlideAdapter(imageList, context));

        CirclePageIndicator circlePageIndicator = (CirclePageIndicator) view.findViewById(R.id.indicator);
        circlePageIndicator.setViewPager(pager);