TabLayout

一、继承结构

public class TabLayout  extends HorizontalScrollView

java.lang.Object

? android.view.View

? android.view.ViewGroup

? android.widget.FrameLayout

? android.widget.HorizontalScrollView

? android.support.design.widget.TabLayout

二、TabLayout的使用

1、TabLayout简单使用

TabLayout来自design兼容包，使用需要添加依赖。android studio 添加依赖如下：

dependencies {
    ~~~
    compile ‘com.android.support:appcompat-v7:23.4.0‘
    compile ‘com.android.support:design:24.2.0‘
}

TabLayout可以水平放置一些tab标签

标签的展示通过 TabLayout.Tab的实例来实现，通过 newTab()方法可以创建这些示例，并且可以通过 setText(int)和setIcon(int)方法分别设置标签的文本的图标。另外，需要通过layout的setTab(Tab)方法把一个标签展示出来。例如：

tabLayout = (TabLayout)findViewById(R.id.tablayout);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));

效果：

你需要通过setOnTabSelectedListener(OnTabSelectedListener)方法，来给标签的选择改变设定一个监听器。当选择状态改变的时候，会通知你的监听器。
你在布局中也可以通过使用TabItem标签给TabLayout设置子标签，例如：

<android.support.design.widget.TabLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.design.widget.TabItem
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="标签" />

    <android.support.design.widget.TabItem
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:icon="@mipmap/ic_launcher" />
</android.support.design.widget.TabLayout>

效果如下：

ViewPager+TabLayout实现导航效果

目标效果一：

方法一：

如果你将TabLayout与ViewPager一起使用，你可以通过调用setupWithViewPager(ViewPager)方法来绑定绑定两个控件。TabLayout将自动出现在ViewPager的标题位置。

方法如下：

MainActivity.java

package com.noonecode.tablayoutdemo;

import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private TabLayout tabLayout;
    private ViewPager viewPager;

    private List<Fragment> list;
    private MyAdapter adapter;
    private String[] titles = {"页面1", "页面2", "页面3"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //实例化
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        tabLayout = (TabLayout) findViewById(R.id.tablayout);
        //页面，数据源
        list = new ArrayList<>();
        list.add(new Tab1Fragment());
        list.add(new Tab2Fragment());
        list.add(new Tab3Fragment());
        //ViewPager的适配器
        adapter = new MyAdapter(getSupportFragmentManager());
        viewPager.setAdapter(adapter);
        //绑定
        tabLayout.setupWithViewPager(viewPager);
    }

    class MyAdapter extends FragmentPagerAdapter {

        public MyAdapter(FragmentManager fm) {
            super(fm);
        }
        @Override
        public Fragment getItem(int position) {
            return list.get(position);
        }

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

        //重写这个方法，将设置每个Tab的标题
        @Override
        public CharSequence getPageTitle(int position) {
            return titles[position];
        }
    }
}

activity_main.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.noonecode.tablayoutdemo.MainActivity">

    <android.support.design.widget.TabLayout
        android:id="@+id/tablayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
    </android.support.v4.view.ViewPager>
</LinearLayout>

方法二：

TabLayout也支持当作ViewPager的装饰来使用，通过在布局中直接把它添加到ViewPager的内部（将自动将ViewPager的标题作为TabLayout的Tab）。

如下方式使用：

MainActivity.java

package com.noonecode.tablayoutdemo;

import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ViewPager viewPager;

    private List<Fragment> list;
    private MyAdapter adapter;
    private String[] titles = {"页面1", "页面2", "页面3"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //实例化
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        //页面，数据源
        list = new ArrayList<>();
        list.add(new Tab1Fragment());
        list.add(new Tab2Fragment());
        list.add(new Tab3Fragment());
        //ViewPager的适配器
        adapter = new MyAdapter(getSupportFragmentManager());
        viewPager.setAdapter(adapter);
    }

    class MyAdapter extends FragmentPagerAdapter {

        ...

        //重写这个方法，将设置每个Tab的标题
        @Override
        public CharSequence getPageTitle(int position) {
            return titles[position];
        }
    }
}

activity_main.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.noonecode.tablayoutdemo.MainActivity">

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

        <android.support.design.widget.TabLayout
            android:id="@+id/tablayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
        </android.support.v4.view.ViewPager>
</LinearLayout>

目标效果二

实现方法：

//MODE_SCROLLABLE可滑动的展示
//MODE_FIXED固定展示
tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

其他可定制属性：

XML attributes
android.support.design:tabBackground	Reference to a background to be applied to tabs.
android.support.design:tabContentStart	Position in the Y axis from the starting edge that tabs should be positioned from.
android.support.design:tabGravity	Gravity constant for tabs.
android.support.design:tabIndicatorColor	Color of the indicator used to show the currently selected tab.
android.support.design:tabIndicatorHeight	Height of the indicator used to show the currently selected tab.
android.support.design:tabMaxWidth	The maximum width for tabs.
android.support.design:tabMinWidth	The minimum width for tabs.
android.support.design:tabMode	The behavior mode for the Tabs in this layout Must be one of the following constant values.
android.support.design:tabPadding	The preferred padding along all edges of tabs.
android.support.design:tabPaddingBottom	The preferred padding along the bottom edge of tabs.
android.support.design:tabPaddingEnd	The preferred padding along the end edge of tabs.
android.support.design:tabPaddingStart	The preferred padding along the start edge of tabs.
android.support.design:tabPaddingTop	The preferred padding along the top edge of tabs.
android.support.design:tabSelectedTextColor	The text color to be applied to the currently selected tab.
android.support.design:tabTextAppearance	A reference to a TextAppearance style to be applied to tabs.
android.support.design:tabTextColor	The default text color to be applied to tabs.

Constants
int	GRAVITY_CENTER	Gravity used to lay out the tabs in the center of the TabLayout.
int	GRAVITY_FILL	Gravity used to fill the TabLayout as much as possible.
int	MODE_FIXED	Fixed tabs display all tabs concurrently and are best used with content that benefits from quick pivots between tabs.
int	MODE_SCROLLABLE	Scrollable tabs display a subset of tabs at any given moment, and can contain longer tab labels and a larger number of tabs.

目标效果三：

实现方法：

TabLayout默认可以实现图示的效果的，比较简单，这里讲述，如何自定义效果。

可以自定义每个Tab的的布局样式，实现丰富的效果。如下：

tab_custom.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/iv_icon"
        android:layout_width="30dp"
        android:layout_height="30dp" />

    <TextView
        android:id="@+id/tv_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

activity_main.xml

这里需要把指示条隐藏掉：tabIndicatorHeight="0dp"

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.noonecode.tablayoutdemo.MainActivity">

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <android.support.design.widget.TabLayout
        android:id="@+id/tablayout"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        app:tabSelectedTextColor="#59D"
        app:tabTextColor="#999"
        app:tabIndicatorHeight="0dp" />
</LinearLayout>

MainActivity.java

package com.noonecode.tablayoutdemo;

import android.content.Context;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private TabLayout tabLayout;
    private ViewPager viewPager;

    private List<Fragment> list;
    private MyAdapter adapter;
    private String[] titles = {"主页", "群组", "搜索", "消息", "更多"};
    private int images[] = {R.drawable.home_selector, R.drawable.group_selector, R.drawable.square_selector, R.drawable.message_selector, R.drawable.more_selector};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //实例化
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        tabLayout = (TabLayout) findViewById(R.id.tablayout);
        //页面，数据源
        list = new ArrayList<>();
        list.add(new Tab1Fragment());
        list.add(new Tab2Fragment());
        list.add(new Tab3Fragment());
        list.add(new Tab4Fragment());
        list.add(new Tab5Fragment());
        //ViewPager的适配器
        adapter = new MyAdapter(getSupportFragmentManager(), this);
        viewPager.setAdapter(adapter);
        //绑定
        tabLayout.setupWithViewPager(viewPager);
        //设置自定义视图
        for (int i = 0; i < tabLayout.getTabCount(); i++) {
            TabLayout.Tab tab = tabLayout.getTabAt(i);
            tab.setCustomView(adapter.getTabView(i));
        }
    }

    class MyAdapter extends FragmentPagerAdapter {

        private Context context;

        public MyAdapter(FragmentManager fm, Context context) {
            super(fm);
            this.context = context;
        }

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

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

        /**
         * 自定义方法，提供自定义Tab
         *
         * @param position 位置
         * @return 返回Tab的View
         */
        public View getTabView(int position) {
            View v = LayoutInflater.from(context).inflate(R.layout.tab_custom, null);
            TextView textView = (TextView) v.findViewById(R.id.tv_title);
            ImageView imageView = (ImageView) v.findViewById(R.id.iv_icon);
            textView.setText(titles[position]);
            imageView.setImageResource(images[position]);
            //添加一行，设置颜色
            textView.setTextColor(tabLayout.getTabTextColors());//
            return v;
        }
    }
}

一些资源：

home_selector.xml，其他的类似

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@mipmap/icon_home_sel" android:state_selected="true" />
    <item android:drawable="@mipmap/icon_home_nor" />
</selector>

图片资源：

注意

TabLayout是5.0出来后的design兼容包内的，如要使用，请手动添加依赖。
本例使用Android Studio导包只需要添加添加依赖，将自动下载项目。
绑定ViewPager之后，将自动将ViewPager的标题作为Tab标签，需要重写适配器的getPageTitle方法给其设置标题。这时，通过addTab添加的Tab将是无效的。
AppCompatActivity继承自FragmentActivity，小伙伴们继承自FragmentActivity也是一样使用的。
如有问题请留言。

（完毕）

导航：

Android 导航条效果实现（一） TabActivity+TabHost

http://blog.csdn.net/qq_33425116/article/details/52573967

Android 导航条效果实现（二） FragmentTabHost

http://blog.csdn.net/qq_33425116/article/details/52575811

Android 导航条效果实现（三） ViewPager+PagerTabStrip

http://blog.csdn.net/qq_33425116/article/details/52577570

Android 导航条效果实现（四） ViewPager+自定义导航条

http://blog.csdn.net/qq_33425116/article/details/52584282

Android 导航条效果实现（五） ActionBar+Fragment

http://blog.csdn.net/qq_33425116/article/details/52587635