ViewPager called multiple times for one fragment

[pishguy]

I'm using simple ViewPager on my activity which with that i attach some fragments into that, when first fragment attached into that, the fragment called multiple

My simple code to test:

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends FragmentActivity {
    MyPageAdapter pageAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_page_view);

        List<Fragment> fragments = getFragments();

        pageAdapter = new MyPageAdapter(getSupportFragmentManager(), fragments);

        ViewPager pager = (ViewPager) findViewById(R.id.viewpager);
        pager.setOffscreenPageLimit(1);
        pager.setAdapter(pageAdapter);

    }

    private List<Fragment> getFragments() {
        List<Fragment> fList = new ArrayList<Fragment>();

        fList.add(MyFragment.newInstance("Fragment 1"));
        fList.add(MyFragment.newInstance("Fragment 2"));
        fList.add(MyFragment.newInstance("Fragment 3"));

        return fList;
    }

    private class MyPageAdapter extends FragmentStatePagerAdapter {
        private List<Fragment> fragments;

        public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) {
            super(fm);
            this.fragments = fragments;
        }

        @Override
        public Fragment getItem(int position) {
            return this.fragments.get(position);
        }

        @Override
        public int getCount() {
            return this.fragments.size();
        }
    }

    public static class MyFragment extends Fragment {
        public static final String EXTRA_MESSAGE = "EXTRA_MESSAGE";

        public static final MyFragment newInstance(String message) {
            MyFragment f   = new MyFragment();
            Bundle     bdl = new Bundle(1);
            bdl.putString(EXTRA_MESSAGE, message);
            f.setArguments(bdl);
            return f;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.myfragment_layout, container, false);

            Toast.makeText(getActivity(), "------->", Toast.LENGTH_SHORT).show();
            return v;
        }
    }
}

could you help me? please