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>