Android 导航条效果实现（六） TabLayout+ViewPager+Fragment

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：

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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>

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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.

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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：

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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

Android 导航条效果实现（六） TabLayout+ViewPager+Fragment
http://blog.csdn.net/qq_33425116/article/details/52599818