tab头部滑动切换，TabLayout和ViewPager实现

首先我们先看一下效果图

-------------------------------->>>>>>>-----------------------------

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

效果图有，代码的原理：

1.布局文件xml  TabLayout 和 ViewPage  两个控件

2.写四个Frament 用  support.v4.app.Frament

3.写一个适配器 用于ViewPage 现实滑动 继承 FragmentPagerAdapter 实现三个方法 《1》getPageTitle(int position) 《2》getItem(int position) 《3》getCount()

4.在activity 里联合前面三步骤，ok

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

下面上传代码 xml

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/lay_root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="song.com.cn.tabactivityviewpage.MainActivity">

    <android.support.design.widget.TabLayout
        android:id="@+id/tab_tl"
        android:layout_width="match_parent"
        android:layout_height="38dp"
        android:background="@color/mall_theme_bg"
        app:tabIndicatorColor="@color/colorAccent"
        app:tabIndicatorHeight="2dp"
        app:tabMode="fixed"
        app:tabSelectedTextColor="@color/colorAccent"
        app:tabTextColor="@color/colorPrimary" />

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

这里只上传一个 frament

package song.com.cn.tabactivityviewpage;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * @author lixiangsong
 * @date 创建时间 : 2017/8/4
 * @Description:
 */

public class OneFragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_one, container, false);
        Log.d("TwoFragment", "-------------OneFragment------");
        return view;
 }
}

下面是 Adapter

public class PagerAdapter extends FragmentPagerAdapter {

    private PagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return tab[position];
    }

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

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

源码下载路径  http://download.csdn.net/detail/qq_33495943/9921605 

还有一个文章，也是tab切换 放在底部切换

链接 http://blog.csdn.net/qq_33495943/article/details/73228369