材料设计---Design

<?xml version="1.0" encoding="utf-8"?>
<!--CoordinatorLayout:协调者布局。-->
<android.support.design.widget.CoordinatorLayout 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:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/teach_appbar"
        android:layout_width="match_parent"
        android:layout_height="260dp">

        <!-- app:layout_scrollFlags="scroll|enterAlways"-->

        <ImageView
            android:id="@+id/teach_image"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:scaleType="fitXY"
            android:src="@mipmap/seek"
            app:layout_scrollFlags="scroll|enterAlways" />

        <android.support.design.widget.TabLayout
            android:id="@+id/teach_tablayout"
            android:layout_width="match_parent"
            android:layout_height="60dp" />
    </android.support.design.widget.AppBarLayout>

    <!--app:layout_behavior="@string/appbar_scrolling_view_behavior"
            下面布局仅支持：NestedScrollView和ViewPager
    -->
    <android.support.v4.view.ViewPager
        android:id="@+id/teach_viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</android.support.design.widget.CoordinatorLayout>

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:id="@+id/tv_fragment_content"
            android:text="@string/article"
            android:textSize="28sp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>
</android.support.v4.widget.NestedScrollView>

/**
 * Design：
 *      TextInputLayout:输入布局，需要嵌套EditText进行使用
 *      TextInputEditText:输入框，可以设置错误提示，
 *      snackBar：加强版的吐司，可以添加点击事件
 *  在开发过程中，要使用一些材料风格的特效，即Design特效
 *  CoordinatorLayout:协调者布局，专门用来处理滑动特效，加强版的FrameLayout
 *  AppBarLayout:专门用来装载导航区域的，非滚动区域。
 *
 */
public class MainActivity extends AppCompatActivity {

    private ViewPager mViewPager;
    private ViewpagerAdapter adapter;
    private TabLayout mTabLaypout;

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

    private void initView() {
        mViewPager = (ViewPager) findViewById(R.id.teach_viewpager);

        adapter = new ViewpagerAdapter(getSupportFragmentManager(),getData());
        mViewPager.setAdapter(adapter);

        mTabLaypout = (TabLayout) findViewById(R.id.teach_tablayout);
        mTabLaypout.setupWithViewPager(mViewPager);
    }

    public List<Fragment> getData() {
        List<Fragment>data=new ArrayList<>();
        for (int i=0;i<4;i++){
            TeachFragment fragment = new TeachFragment();
            data.add(fragment);
        }
        return data;
    }
}

public class ViewpagerAdapter extends FragmentPagerAdapter {

    private List<Fragment>data;


    public ViewpagerAdapter(FragmentManager fm,List<Fragment>data) {
        super(fm);
        this.data=data;
    }

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

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

    @Override
    public CharSequence getPageTitle(int position) {
        return "标题"+position;
    }
}

public class TeachFragment extends Fragment {
    private View layout;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        layout = inflater.inflate(R.layout.fragment_teach,container,false);
        return layout;
    }
}