TabLayout，使用小结

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一晃又一年

效果图

TabLayout详解

什么是TabLayout

TabLayout provides a horizontal layout to display tabs.[google]
TabLayout是一个用于放置水平Tab的布局

你可以设置文字，icon，甚至是自定义的View

TabLayout的继承关系

TabLayout可配置属性

属性名解释 tabContentStart 开始位置的偏移量 tabBackground 设置Tab的背景色 tabGravity 分为fill,center,Tab的对齐方式 tabIndicatorColor 导航条的颜色 tabIndicatorHeight 导航条的高度 tabMaxWidth Tab的最大宽度 tabMinWidth Tab的最小宽度 tabMode 分为scrollable,fixed,Tab的模式(设置为scrollable代表tab足够多的时候可以水平滚动，而设置为fixed则表示所有tab默认在一页显示，不能滚动) tabPadding Tab的内边距 tabPaddingBottom Tab的内底边距 tabPaddingEnd Tab的右内边距 tabPaddingStart Tab的左内边距 tabPaddingTop Tab的上内边距 tabSelectedTextColor Tab文字选中颜色 tabTextColor Tab文字颜色（未选中） tabTextAppearance Tab文字样式

TabGravity跟tabMode有着紧密的联系，具体区别如图所示：

1，TabGravity:fill & tabMode:fixed

tab较少时
fill&fixed

tab较多时
fill&fixed

2，TabGravity:center & tabMode:fixed

tab较少时
center&fixed

tab较多时
fill&fixed

3，TabGravity:fill & tabMode:scrollable

tab较少时
fill&scrollable

tab较多时
fill&scrollable

4，TabGravity:center & tabMode:scrollable
tab较少时
fill&scrollable

tab较多时
fill&scrollable

TabGravity属性只有在TabMode为fixed情况下才有用

XML配置Tab

效果图：

此处输入图片的描述

自定义属性跟布局代码：

首先是我们的自定义属性:

    <style name="AppTabLayout" parent="Widget.Design.TabLayout">        <item name="android:background">@color/colorPrimary</item>        <item name="tabIndicatorColor">@color/tabTextSelected</item>        <item name="tabTextColor">@color/tabText</item>        <item name="tabSelectedTextColor">@color/tabTextSelected</item>        <item name="tabGravity">fill</item>        <item name="tabMode">scrollable</item><!--默认scrollable模式-->        <item name="tabIndicatorHeight">2dp</item>        <item name="tabPaddingStart">8dp</item>        <item name="tabPaddingEnd">8dp</item>        <item name="tabTextAppearance">@style/TextAppearance</item>    </style>    <style name="TextAppearance" parent="TextAppearance.Design.Tab">        <item name="android:textSize">16sp</item>        <item name="textAllCaps">true</item>    </style>

接下来是布局代码：

 <android.support.design.widget.TabLayout        android:id="@+id/tabLayout"        android:layout_width="match_parent"        android:layout_height="?attr/actionBarSize"        style="@style/AppTabLayout"        >        <android.support.design.widget.TabItem            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="热点" />         <android.support.design.widget.TabItem            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:icon="@mipmap/ic_launcher"/>        <android.support.design.widget.TabItem            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="全球" />        <android.support.design.widget.TabItem            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="新闻30分" />        <android.support.design.widget.TabItem            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="网易" />        <android.support.design.widget.TabItem            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="叮当猫" />    </android.support.design.widget.TabLayout>

代码设置Tab

效果图：

效果图

代码：

  @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        TabLayout mTabLayout = (TabLayout) findViewById(R.id.tabLayout);        mTabLayout.addTab(mTabLayout.newTab().setIcon(R.mipmap.ic_launcher));//设置为icon        mTabLayout.addTab(mTabLayout.newTab().setText("实时"));        mTabLayout.addTab(mTabLayout.newTab().setText("全球"),0,true);//添加tab指定tab位置并设为选中        mTabLayout.addTab(mTabLayout.newTab().setText("新闻30分"));        mTabLayout.addTab(mTabLayout.newTab().setText("网易"));        mTabLayout.addTab(mTabLayout.newTab().setText("叮当猫"));        //这里都可以用代码设置TabLayout的属性，这里不列    }

这里将addTab方法的源码贴出，很明了：

      /**     * Add a tab to this layout. The tab will be inserted at <code>position</code>.     * If this is the first tab to be added it will become the selected tab.     *     * @param tab The tab to add     * @param position The new position of the tab     */    public void addTab(@NonNull Tab tab, int position) {        addTab(tab, position, mTabs.isEmpty());//mTabs用于存储TabLayout的所有tab    }    /**     * Add a tab to this layout. The tab will be added at the end of the list.     *     * @param tab Tab to add     * @param setSelected True if the added tab should become the selected tab.     */    public void addTab(@NonNull Tab tab, boolean setSelected) {        if (tab.mParent != this) {            throw new IllegalArgumentException("Tab belongs to a different TabLayout.");        }        addTabView(tab, setSelected);        configureTab(tab, mTabs.size());        if (setSelected) {            tab.select();        }    }    /**     * Add a tab to this layout. The tab will be inserted at <code>position</code>.     *     * @param tab The tab to add     * @param position The new position of the tab     * @param setSelected True if the added tab should become the selected tab.     */    public void addTab(@NonNull Tab tab, int position, boolean setSelected) {        if (tab.mParent != this) {            throw new IllegalArgumentException("Tab belongs to a different TabLayout.");        }        addTabView(tab, position, setSelected);        configureTab(tab, position);        if (setSelected) {            tab.select();        }    }

tips
java代码设置默认选中

tablayout.getTabAt(position).select();

监听Tab的各种事件

效果图：

点击效果图

Java代码：

 @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        TabLayout mTabLayout = (TabLayout) findViewById(R.id.tabLayout);        mTabLayout.addTab(mTabLayout.newTab().setText("热点"),false);//不选中        mTabLayout.addTab(mTabLayout.newTab().setText("实时"),false);        mTabLayout.addTab(mTabLayout.newTab().setText("全球"),1,true);//添加tab指定tab位置并设为选中        mTabLayout.addTab(mTabLayout.newTab().setText("新闻30分"),false);        mTabLayout.addTab(mTabLayout.newTab().setText("网易"));        mTabLayout.addTab(mTabLayout.newTab().setText("叮当猫"),false);        mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {            /**             * 当tab第一次选择时候调用             * @param tab             */            @Override            public void onTabSelected(TabLayout.Tab tab) {                Toast.makeText(MainActivity.this, "select tab = "+tab.getText(), Toast.LENGTH_SHORT).show();            }            /**             * 当tab从 选择 ->未选择             * @param tab             */            @Override            public void onTabUnselected(TabLayout.Tab tab) {                Toast.makeText(MainActivity.this, "unselected = "+tab.getText(), Toast.LENGTH_SHORT).show();            }            /**             * 当tab已是选择状态时，继续点击调用此方法             * @param tab             */            @Override            public void onTabReselected(TabLayout.Tab tab) {                Toast.makeText(MainActivity.this, "reselected = "+tab.getText(), Toast.LENGTH_SHORT).show();            }        });    }

TabLayout联合ViewPager

效果图:

效果图

java代码

public class MainActivity extends AppCompatActivity {    private List<String> titleList;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        titleList = new ArrayList<>();        titleList.add("热点");        titleList.add("全球");        titleList.add("实时");        titleList.add("新闻30分");        titleList.add("网易");        titleList.add("叮当猫");        TabLayout mTabLayout = (TabLayout) findViewById(R.id.tabLayout);        ViewPager mViewPager = (ViewPager) findViewById(R.id.viewPager);        mViewPager.setAdapter(new CustomPagerAdapter(this));        mTabLayout.setupWithViewPager(mViewPager);    }    class CustomPagerAdapter extends PagerAdapter{        private Context context;        public CustomPagerAdapter(Context context){            this.context = context;        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            TextView mTextView = new TextView(context);            mTextView.setText(titleList.get(position));            mTextView.setGravity(Gravity.CENTER);            mTextView.setTextColor(Color.WHITE);            mTextView.setTextSize(20);            container.addView(mTextView);            return mTextView;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {           container.removeView((View) object);        }        @Override        public int getCount() {            return titleList.size() == 0 ? 0 :  titleList.size();        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view == object;        }        @Override        public CharSequence getPageTitle(int position) {            return titleList.get(position);        }    }}

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"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@android:color/darker_gray"    android:orientation="vertical"    app:layout_behavior="@string/appbar_scrolling_view_behavior">     <android.support.design.widget.TabLayout        android:id="@+id/tabLayout"        android:layout_width="match_parent"        android:layout_height="?attr/actionBarSize"        style="@style/AppTabLayout"        />    <android.support.v4.view.ViewPager        android:id="@+id/viewPager"        android:layout_width="match_parent"        android:layout_height="match_parent" /></LinearLayout>

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