滑动viewpage

Adapter：

package com.example.fashionyuan.Adatader;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

import java.util.ArrayList;

/**
 * Created by 梁Sir on 2017/9/26.
 */

public class Adatader extends FragmentPagerAdapter{
    private ArrayList<Fragment>list;

    public Adatader(FragmentManager fm, ArrayList<Fragment> list) {
        super(fm);
        this.list = list;
    }

    public Adatader(FragmentManager fm) {
        super(fm);
    }

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

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

mian：

package com.example.fashionyuan.main;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import com.example.fashionyuan.Adatader.Adatader;
import com.example.fashionyuan.Fragment.FragmentA;
import com.example.fashionyuan.Fragment.FragmentB;
import com.example.fashionyuan.Fragment.FragmentC;
import com.example.fashionyuan.Fragment.FragmentD;
import com.example.fashionyuan.Fragment.FragmentE;
import com.example.fashionyuan.R;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener, ViewPager.OnPageChangeListener {
    private ArrayList<Fragment> list;
    private FragmentManager fm;
    private ViewPager vp;
    private RadioButton[] radioButtons;
    private RadioGroup rg;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        vp = (ViewPager) findViewById(R.id.vp);
        rg = (RadioGroup) findViewById(R.id.rg);
        radioButtons =new RadioButton[rg.getChildCount()];
        for (int i = 0; i <radioButtons.length; i++) {
            radioButtons[i] = (RadioButton) rg.getChildAt(i);
        }
        FragmentA fragmentA=new FragmentA();
        FragmentB fragmentB=new FragmentB();
        FragmentC fragmentC=new FragmentC();
        FragmentD fragmentD=new FragmentD();
        FragmentE fragmentE=new FragmentE();
        list = new ArrayList<>();
        list.add(fragmentA);
        list.add(fragmentB);
        list.add(fragmentC);
        list.add(fragmentD);
        list.add(fragmentE);
        fm = getSupportFragmentManager();
        Adatader adatader = new Adatader(fm,list);
        vp.setAdapter(adatader);
        radioButtons[0].setChecked(true);
        rg.setOnCheckedChangeListener(this);
        vp.setOnPageChangeListener(this);


    }

    @Override
    public void onCheckedChanged(RadioGroup radioGroup, int i) {
        for (int j = 0; j <radioButtons.length; j++) {
            if (radioButtons[j].getId()==i){
                vp.setCurrentItem(j);
  
            }
        }
    }

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

    }

    @Override
    public void onPageSelected(int position) {
        radioButtons[position].setChecked(true);

    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }
}