封面

1.介绍

TabLayout 是Google在2015年I/O大会上推出的一款选项卡控件，功能与TabPageIndicator类似，可以兼容到Android2.1及以上版本。
效果图如下：

TabLayout

2.使用方法

在build.gradle文件中加上这段代码：

compile 'com.android.support:design:22.2.0'

public class TabLayoutActivity extends AppCompatActivity {

    @Bind(R.id.tab)
    TabLayout tab;
    @Bind(R.id.vp_view)
    ViewPager vpView;

    private LayoutInflater layoutInflater;
    //页卡标题集合
    private List<String> titleList = new ArrayList<>();
    //页卡视图
    private View view;
    //页卡视图集合
    private List<View> viewList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tab_layout);
        ButterKnife.bind(this);

        initView();
    }

    private void initView() {
        layoutInflater = LayoutInflater.from(this);
        //设置tab模式，当前为系统默认模式
        tab.setTabMode(TabLayout.MODE_SCROLLABLE);

        //添加页卡标题
        titleList.add("标题一");
        titleList.add("标题二");
        titleList.add("标题三");
        titleList.add("标题四");
        titleList.add("标题五");
        titleList.add("标题六");

        for (int i = 0; i <= 5; i++) {
            view = layoutInflater.inflate(R.layout.activity_tab_item, null);
            //添加页卡视图
            viewList.add(view);
            //添加tab选项卡
            tab.addTab(tab.newTab().setText(titleList.get(i)));
        }

        TabAdapter tabAdapter = new TabAdapter(viewList);
        vpView.setAdapter(tabAdapter);
        //将TabLayout和ViewPager关联起来。
        tab.setupWithViewPager(vpView);
        //给Tabs设置适配器
        tab.setTabsFromPagerAdapter(tabAdapter);
    }

    class TabAdapter extends PagerAdapter {
        private List<View> viewList;

        public TabAdapter(List<View> viewList) {
            this.viewList = viewList;
        }

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

        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view == object;
        }

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            //添加页卡
            container.addView(viewList.get(position));
            return viewList.get(position);
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            //删除页卡
            container.removeView(viewList.get(position));
        }

        @Override
        public CharSequence getPageTitle(int position) {
            //页卡标题
            return titleList.get(position);
        }
    }
}

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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.design.widget.TabLayout
        android:id="@+id/tab"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabIndicatorColor="@color/color_2F9DD2"
        app:tabSelectedTextColor="@color/color_2F9DD2"
        app:tabTextColor="@color/color_333333" />

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

</LinearLayout>

GitHub地址：https://github.com/alidili/DesignSupportDemo