View Pager is not working

PagerAdapter.java

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.squareup.picasso.MemoryPolicy;
import com.squareup.picasso.Picasso;

import java.util.ArrayList;
import java.util.HashMap;

import info.androidhive.slidingmenu.R;
import info.androidhive.slidingmenu.library.Global_JsonTags;


public class News_Adapter extends PagerAdapter
{
    Context mContext;
    Global_JsonTags jsontags = new Global_JsonTags();
    LayoutInflater inflater;
    LayoutInflater mLayoutInflater;
    //using abc for testing 
    String[] abc = {"a","b","c"};
  //  ArrayList<HashMap<String, String>> home_news_arrays = new ArrayList<HashMap<String, String>>();

    // contsructor
    public News_Adapter(Context context, ArrayList<HashMap<String, String>> home_news_array) {
        mContext = context;
        home_news_arrays = new ArrayList<HashMap<String, String>>(home_news_array);
        mLayoutInflater = (LayoutInflater) mContext.getSystemService(mContext.LAYOUT_INFLATER_SERVICE);
       
    }

    @Override
    public int getCount() {
        return abc.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == ((RelativeLayout) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        inflater = (LayoutInflater) mContext
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View itemView = inflater.inflate(R.layout.news, container, false);

        //getting views
        ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView54);
        TextView news_title = (TextView) itemView.findViewById(R.id.news_title);
        TextView news_date = (TextView) itemView.findViewById(R.id.home_new_date);
        TextView news_descrition = (TextView) itemView.findViewById(R.id.home_news_description);

        // maping values
        Log.d(" News home_news_array ", home_news_arrays.get(position).get("product_name"));

        news_title.setText("working");
        news_date.setText("working");
        news_descrition.setText(home_news_arrays.get(position).get(jsontags.home_news_description));

        Picasso.with(mContext)
                .load(home_news_arrays.get(position).get("product_image"))
                .placeholder(R.drawable.ic_stub) // optional
                .error(R.drawable.ic_error)         // optional
                .fit()
                .centerCrop()
                .memoryPolicy(MemoryPolicy.NO_CACHE)
                .into(imageView);

        container.addView(itemView);

        return itemView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((RelativeLayout) object);
    }
}