横向滚动

//布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" tools:context="com.example.lxb20170912.MainActivity"
    android:orientation="vertical"
    >

   <HorizontalScrollView
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/hs"
       android:layout_marginTop="30dip"
       >
       <LinearLayout
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:orientation="horizontal"
           android:id="@+id/showtitle"
           >
       </LinearLayout>
  </HorizontalScrollView>

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

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

//MainActivity
package com.example.lxb20170912;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private LinearLayout show;
    private HorizontalScrollView hs;
    private ViewPager vp;
    private String[] titles;
    private ArrayList<TextView> list;

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

        show =(LinearLayout)findViewById(R.id.showtitle);//布局
        hs =(HorizontalScrollView)findViewById(R.id.hs);//滚动
        vp =(ViewPager)findViewById(R.id.vp);//viewpager
        titles = new String[]{"头条", "社会", "国内", "国际", "娱乐", "体育", "军事", "科技", "财经", "时尚"};
        list =new ArrayList<TextView>();

        for (int i=0;i<titles.length;i++){//for循环放入textview
            TextView view = new TextView(this);//自定义一个textview
            view.setText(titles[i]);//把数组的内容放入textview控件
            view.setTextSize(20);//设置字体的大小
            if(i==0){//设置刚进入的字体颜色
                view.setTextColor(Color.RED);
            }else{
                view.setTextColor(Color.BLACK);
            }
            view.setOnClickListener(this);//textview控件的点击事件
            view.setId(i+10000);//
            //设置textview控件的宽高
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            params.setMargins(20,10,20,10);//设置内边距
            show.addView(view,params);//将textview控件添加到滚动控件里面的LinearLayout布局
            list.add(view);//添加到集合

        }
        vp.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {


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

            @Override
            public int getCount() {
                return titles.length;
            }
        });
        vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                for (int i=0;i<list.size();i++){
                    if(position==i){
                        list.get(i).setTextColor(Color.RED);
                    }else{
                        list.get(i).setTextColor(Color.BLACK);
                    }
                }
                TextView textView = list.get(position);
                int width = textView.getWidth();//获取宽度
                //计算该滑到哪里
                hs.scrollTo((width+20)*position,0);//viewpager滑动时与滚动控件想配合一起滑动
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

    }

    @Override
    public void onClick(View view) {
        int id = view.getId();
        vp.setCurrentItem(id-10000);//
    }
}
//fragment
package com.example.lxb20170912;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 * 作者：刘雄彪
 */

public class fragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        Bundle arguments = getArguments();
        String sss = arguments.getString("sss");
        TextView textView = new TextView(getActivity());
        textView.setText(sss);
        return textView;
    }
    public static Fragment getin(String titles){
        fragment fragment0 = new fragment();
        Bundle bundle = new Bundle();
        bundle.putString("sss",titles);
        fragment0.setArguments(bundle);
        return fragment0;
    }
}