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 ：

 1 package com.zzw.testtablayout;
 2
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.support.design.widget.TabLayout;
 6 import android.support.v4.view.PagerAdapter;
 7 import android.support.v4.view.ViewPager;
 8 import android.view.Gravity;
 9 import android.view.View;
10 import android.view.ViewGroup;
11 import android.widget.TextView;
12
13 public class MainActivity extends Activity {
14
15     private final int COUNT = 10;
16
17     @Override
18     protected void onCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20         setContentView(R.layout.activity_main);
21
22         TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);
23
24         tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
25
26         ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
27         viewPager.setAdapter(new MyAdapter(this));
28
29         // TabLayout和ViewPager双向、交互联动。
30         tabLayout.setupWithViewPager(viewPager);
31     }
32
33     private class MyAdapter extends PagerAdapter {
34         private Activity activity;
35
36         public MyAdapter(Activity activity) {
37             this.activity = activity;
38         }
39
40         @Override
41         public CharSequence getPageTitle(int position) {
42
43             return "选项" + position;
44         }
45
46         @Override
47         public Object instantiateItem(View container, int position) {
48             TextView tv = new TextView(activity);
49             tv.setText("ViewPager" + position);
50             tv.setTextSize(30.0f);
51             tv.setGravity(Gravity.CENTER);
52
53             ((ViewGroup) container).addView(tv);
54             return tv;
55         }
56
57         @Override
58         public void destroyItem(View container, int position, Object object) {
59             ((ViewPager) container).removeView((View) object);
60
61         }
62
63         @Override
64         public int getCount() {
65             return COUNT;
66         }
67
68         @Override
69         public boolean isViewFromObject(View arg0, Object arg1) {
70             return arg0 == arg1;
71         }
72
73     }
74 }

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

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     android:orientation="vertical"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent" >
 7
 8     <!-- app:tabIndicatorColor 指示器（字体下面的那一个横）显示颜色 -->
 9     <!-- app:tabSelectedTextColor 选中的字体颜色 -->
10     <!-- app:tabTextColor 未选中的字体颜色 -->
11
12     <android.support.design.widget.TabLayout
13         android:id="@+id/tabLayout"
14         android:layout_width="match_parent"
15         android:layout_height="wrap_content"
16         app:tabIndicatorColor="#26c6da"
17         app:tabSelectedTextColor="#f44336"
18         app:tabTextColor="#bdbdbd" />
19
20     <android.support.v4.view.ViewPager
21         android:id="@+id/viewPager"
22         android:layout_weight="1"
23         android:layout_width="match_parent"
24         android:layout_height="wrap_content" />
25
26 </LinearLayout>