Android Material Design:ViewPager与android.support.design.widget.TabLayout双向交互联动切换

通常，android.support.design.widget.TabLayout与Android的ViewPager联合使用，实现与ViewPager的切换与联动。
（1）比如，当用户手指触摸选择TabLayout中的某一项时候，ViewPager应当自动切换跳转到相应的Page页面；
（2）同样，当用户在翻动ViewPager时候，TabLayout也会自动的滚动到与当前ViewPager页面像对应的子item tab并使该子item tab处于选中状态。

测试用的主Activity MainActivity.java ：

 package com.zzw.testtablayout;

 import android.app.Activity;
 import android.os.Bundle;
 import android.support.design.widget.TabLayout;
 import android.support.v4.view.PagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;

 public class MainActivity extends Activity {

     private final int COUNT = 10;

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

         TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);

         tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

         ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
         viewPager.setAdapter(new MyAdapter(this));

         // TabLayout和ViewPager双向、交互联动。
         tabLayout.setupWithViewPager(viewPager);
     }

     private class MyAdapter extends PagerAdapter {
         private Activity activity;

         public MyAdapter(Activity activity) {
             this.activity = activity;
         }

         @Override
         public CharSequence getPageTitle(int position) {

             return "选项" + position;
         }

         @Override
         public Object instantiateItem(View container, int position) {
             TextView tv = new TextView(activity);
             tv.setText("ViewPager" + position);
             tv.setTextSize(30.0f);
             tv.setGravity(Gravity.CENTER);

             ((ViewGroup) container).addView(tv);
             return tv;
         }

         @Override
         public void destroyItem(View container, int position, Object object) {
             ((ViewPager) container).removeView((View) object);

         }

         @Override
         public int getCount() {
             return COUNT;
         }

         @Override
         public boolean isViewFromObject(View arg0, Object arg1) {
             return arg0 == arg1;
         }

     }
 }

MainActivity.java需要的布局文件：activity_main.xml：

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent" >

     <!-- app:tabIndicatorColor 指示器（字体下面的那一个横）显示颜色 -->
     <!-- app:tabSelectedTextColor 选中的字体颜色 -->
     <!-- app:tabTextColor 未选中的字体颜色 -->

     <android.support.design.widget.TabLayout
         android:id="@+id/tabLayout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         app:tabIndicatorColor="#26c6da"
         app:tabSelectedTextColor="#f44336"
         app:tabTextColor="#bdbdbd" />

     <android.support.v4.view.ViewPager
         android:id="@+id/viewPager"
         android:layout_weight="1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />

 </LinearLayout>