Android 使用TabLayout、ViewPager和Fragment实现顶部菜单可滑动切换

效果图如下

首先，要使用控件需要添加design library，在Android Studio中添加

compile 'com.android.support:design:23.4.0'

然后是布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context="com.lg.tablayoutdemo.MainActivity">  
 
    <android.support.design.widget.TabLayout
        android:id="@+id/tab_layou"
        android:layout_width="match_parent"
        app:tabIndicatorColor="@android:color/holo_blue_light"
        app:tabTextColor="@android:color/darker_gray"
        app:tabSelectedTextColor="@android:color/black"
        android:layout_height="wrap_content" />  
 
    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_below="@id/tab_layou"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />  
 
</RelativeLayout>

其中TabLayout中tabIndicatorColor属性为标签底部下滑线颜色，tabTextColor为标签未选中时字体颜色,tabSelectedTextColor为选中时字体颜色

自定一个FragmentPagerAdapter适配器

public class MyViewPagerAdapter extends FragmentPagerAdapter {
    private List<Fragment> fragments;
    private String[] titles;  
 
    public MyViewPagerAdapter(FragmentManager fm, String[] titles, List<Fragment> fragments) {
        super(fm);
        this.titles = titles;
        this.fragments = fragments;
    }  
 
    @Override
    public Fragment getItem(int arg0) {
        return fragments.get(arg0);
    }  
 
    @Override
    public CharSequence getPageTitle(int position) {
        return titles[position];
    }  
 
    @Override
    public int getCount() {
        return fragments.size();
    }
}

Fragment代码我就不贴了，会在下面奉上源码地址

public class MainActivity extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
    private TabLayout tabLayout;
    private ViewPager viewPager;
    private MyViewPagerAdapter viewPagerAdapter;
    //TabLayout标签
    private String[] titles=new String[]{"ANDROID","JAVA","C#","PHP"};
    private List<Fragment> fragments=new ArrayList<>();  
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
    }  
 
    private void init(){
        tabLayout=(TabLayout)findViewById(R.id.tab_layou);
        viewPager=(ViewPager)findViewById(R.id.view_pager);
        //设置TabLayout标签的显示方式
        tabLayout.setTabMode(TabLayout.MODE_FIXED);
        //循环注入标签
        for (String tab:titles){
          tabLayout.addTab(tabLayout.newTab().setText(tab));
        }
        //设置TabLayout点击事件
        tabLayout.setOnTabSelectedListener(this);  
 
        fragments.add(new AndroidFragment());
        fragments.add(new JavaFragment());
        fragments.add(new CshapFragment());
        fragments.add(new PhpFragment());
        viewPagerAdapter=new MyViewPagerAdapter(getSupportFragmentManager(),titles,fragments);
        viewPager.setAdapter(viewPagerAdapter);
        tabLayout.setupWithViewPager(viewPager);
    }  
 
    @Override
    public void onTabSelected(TabLayout.Tab tab) {
        viewPager.setCurrentItem(tab.getPosition());
    }  
 
    @Override
    public void onTabUnselected(TabLayout.Tab tab) {  
 
    }  
 
    @Override
    public void onTabReselected(TabLayout.Tab tab) {  
 
    }
}

以上是核心代码，至此功能就实现了，当然也可 以根据不同的需求进行改动

源码地址：http://down.51cto.com/data/2221954