ViewPager Indicator circular style in Android

pager_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:fitsSystemWindows="true"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:src="@mipmap/abc1"
        android:id="@+id/img_pager_item"
        android:scaleType="fitXY"
        android:adjustViewBounds="true"
        android:clickable="false"/>

</LinearLayout>


activity_viewpager_demo.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.androprogrammer.tutorials.samples.ViewPagerDemo">

    <android.support.v4.view.ViewPager
        android:id="@+id/pager_introduction"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:listitem="@layout/pager_item" />

    <RelativeLayout
        android:id="@+id/viewPagerIndicator"
        android:layout_width="match_parent"
        android:layout_height="55dp"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="5dp"
        android:gravity="center">

        <LinearLayout
            android:id="@+id/viewPagerCountDots"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerHorizontal="true"
            android:gravity="center"
            android:orientation="horizontal" />

        <ImageButton
            android:id="@+id/btn_next"
            android:layout_width="42dip"
            android:layout_height="42dip"
            android:layout_alignParentRight="true"
            android:layout_marginRight="15dip"
            android:background="@drawable/btn_round_semitransperant"
            android:src="@mipmap/ic_navigation_arrow_forward" />

        <ImageButton
            android:id="@+id/btn_finish"
            android:layout_width="42dip"
            android:layout_height="42dip"
            android:layout_alignParentRight="true"
            android:layout_marginRight="15dip"
            android:background="@drawable/btn_round_semitransperant"
            android:contentDescription="Let's start"
            android:src="@mipmap/ic_navigation_check"
            android:visibility="gone" />

    </RelativeLayout>


</RelativeLayout>

ViewPagerDemo.java

package com.example.sphere65.pagerindicatorcircularstyle;

import android.os.Bundle;

import android.support.v4.view.ViewPager;

import android.support.v7.app.AppCompatActivity;

import android.view.LayoutInflater;

import android.view.MenuItem;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.widget.ImageButton;

import android.widget.ImageView;

import android.widget.LinearLayout;

public class ViewPagerDemo extends AppCompatActivity implements ViewPager.OnPageChangeListener, View.OnClickListener{

    protected View view;

    private ImageButton btnNext, btnFinish;

    private ViewPager intro_images;

    private LinearLayout pager_indicator;

    private int dotsCount;

    private ImageView[] dots;

    private ViewPagerAdapter mAdapter;

    private int[] mImageResources = {

            R.mipmap.abc1,

            R.mipmap.abc2,

            R.mipmap.abc3,

            R.mipmap.abc4,

            R.mipmap.abc5

    };

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_viewpager_demo);

        intro_images = (ViewPager) findViewById(R.id.pager_introduction);

        btnNext = (ImageButton) findViewById(R.id.btn_next);

        //btnSkip = (Button) findViewById(R.id.btn_skip);

        btnFinish = (ImageButton) findViewById(R.id.btn_finish);

        pager_indicator = (LinearLayout) findViewById(R.id.viewPagerCountDots);

        btnNext.setOnClickListener(this);

        //btnSkip.setOnClickListener(this);

        btnFinish.setOnClickListener(this);

        mAdapter = new ViewPagerAdapter(ViewPagerDemo.this, mImageResources);

        intro_images.setAdapter(mAdapter);

        intro_images.setCurrentItem(0);

        intro_images.setOnPageChangeListener(this);

        setUiPageViewController();

       //toolbar.setVisibility(View.GONE);

//        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    }

    /*@Override

    public void setReference() {

      //  view = LayoutInflater.from(this).inflate(R.layout.activity_viewpager_demo,container);

    }*/

    private void setUiPageViewController() {

        dotsCount = mAdapter.getCount();

        dots = new ImageView[dotsCount];

        for (int i = 0; i < dotsCount; i++) {

            dots[i] = new ImageView(this);

            dots[i].setImageDrawable(getResources().getDrawable(R.drawable.nonselecteditem_dot));

            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(

                    LinearLayout.LayoutParams.WRAP_CONTENT,

                    LinearLayout.LayoutParams.WRAP_CONTENT

            );

            params.setMargins(4, 0, 4, 0);

            pager_indicator.addView(dots[i], params);

        }

        dots[0].setImageDrawable(getResources().getDrawable(R.drawable.selecteditem_dot));

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        switch (item.getItemId()) {

            // Respond to the action bar's Up/Home button

            case android.R.id.home:

                finish();

                // NavUtils.navigateUpFromSameTask(this);

                // return true;

                break;

        }

        return super.onOptionsItemSelected(item);

    }

    @Override

    public void onClick(View v) {

        switch (v.getId()) {

            case R.id.btn_next:

                intro_images.setCurrentItem((intro_images.getCurrentItem() < dotsCount)

                        ? intro_images.getCurrentItem() + 1 : 0);

                break;

            case R.id.btn_finish:

                finish();

                break;

        }

    }

    @Override

    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

    }

    @Override

    public void onPageSelected(int position) {

        for (int i = 0; i < dotsCount; i++) {

            dots[i].setImageDrawable(getResources().getDrawable(R.drawable.nonselecteditem_dot));

        }

        dots[position].setImageDrawable(getResources().getDrawable(R.drawable.selecteditem_dot));

        if (position + 1 == dotsCount) {

            btnNext.setVisibility(View.GONE);

            btnFinish.setVisibility(View.VISIBLE);

        } else {

            btnNext.setVisibility(View.VISIBLE);

            btnFinish.setVisibility(View.GONE);

        }

    }

    @Override

    public void onPageScrollStateChanged(int state) {

    }

}

ViewPagerAdapter.java

package com.example.sphere65.pagerindicatorcircularstyle;

import android.content.Context;

import android.support.v4.view.PagerAdapter;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.LinearLayout;

/**

 * Created by Wasim on 11-06-2015.

 */

public class ViewPagerAdapter extends PagerAdapter {

    private Context mContext;

    private int[] mResources;

    public ViewPagerAdapter(Context mContext, int[] mResources) {

        this.mContext = mContext;

        this.mResources = mResources;

    }

    @Override

    public int getCount() {

        return mResources.length;

    }

    @Override

    public boolean isViewFromObject(View view, Object object) {

        return view == ((LinearLayout) object);

    }

    @Override

    public Object instantiateItem(ViewGroup container, int position) {

        View itemView = LayoutInflater.from(mContext).inflate(R.layout.pager_item, container, false);

        ImageView imageView = (ImageView) itemView.findViewById(R.id.img_pager_item);

        imageView.setImageResource(mResources[position]);

        container.addView(itemView);

        return itemView;

    }

    @Override

    public void destroyItem(ViewGroup container, int position, Object object) {

        container.removeView((LinearLayout) object);

    }

}