TabLayout和Viewpager配合使用

compile 'com.android.support:design:26+'

下面代码是在，XML里的：

<?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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="zhaochuang.bawei.com.day_rikao.MainActivity">
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tab"
></android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:id="@+id/vp"
></android.support.v4.view.ViewPager>
</LinearLayout>
下面代码是一个Fragment的普通方法

public class BlankFragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        TextView textView = new TextView(getActivity());
        double random = Math.random();
        textView.setText("xxxxxxxxxxx"+random);
        return textView;
    }
然后在MianActivity调用了上面这些个方法，如一下代码
package com.bwie.tablayoutdemo2;

import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;

import java.util.ArrayList;

/**
 * 1--tablayout
 * 2--- viewPager
 * 3--viewPagerAdapter
 * 4-- 让TabLayout和Viewpager关联;
 */
public class MainActivity extends AppCompatActivity {

    private TabLayout tabLayout;
    private ViewPager viewPager;
    ArrayList<Fragment> fragmentList = new ArrayList<Fragment>();
    ArrayList<String> titleList = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tabLayout = (TabLayout) findViewById(R.id.tabLayout);
        viewPager = (ViewPager) findViewById(R.id.viewPager);
        initData();
        //ctrl+p 提示参数的快捷键
        MPagerAdapter mPagerAdapter = new MPagerAdapter(getSupportFragmentManager());
        viewPager.setAdapter(mPagerAdapter);

        //设置TabLayout的模式
        tabLayout.setTabMode(TabLayout.MODE_FIXED);
        //让tablayout和Viewpager关联;
        tabLayout.setupWithViewPager(viewPager);

    }

    private void initData() {
        for (int i = 0; i <4 ; i++) {
            fragmentList.add(new BlankFragment());
            titleList.add("爱因斯坦" +i);
        }

    }

    class  MPagerAdapter extends FragmentPagerAdapter{

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

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

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

        //需要重写个返回标题的方法;
        @Override
        public CharSequence getPageTitle(int position) {
            return titleList.get(position);
        }
    }

}