Tablayout

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xml中

<?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:id="@+id/activity_zhuye"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.bwie.yuekaomoni.ZhuyeActivity">    <android.support.design.widget.TabLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/tablayout">    </android.support.design.widget.TabLayout>    <android.support.v4.view.ViewPager        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/viewpager" /></LinearLayout>

MainActivtiy中

public class ZhuyeActivity extends AppCompatActivity{    private TabLayout tabLayout;    private ViewPager viewPager;    private FragmentAdapter fragmentAdapter;    private ArrayList<Fragment> fragments;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_zhuye);            tabLayout= (TabLayout) findViewById(R.id.tablayout);            viewPager= (ViewPager) findViewById(R.id.viewpager);        fragments=new ArrayList<Fragment>();        FragmentOne fragment1 = new FragmentOne();        FragmentTwo fragment2 = new FragmentTwo();        FragmentThree fragment3 = new FragmentThree();        FragmentFour fragment4 = new FragmentFour();        fragments.add(fragment1);        fragments.add(fragment2);        fragments.add(fragment3);        fragments.add(fragment4);        fragmentAdapter = new FragmentAdapter(getSupportFragmentManager(),fragments);        viewPager.setAdapter(fragmentAdapter);        tabLayout.setupWithViewPager(viewPager);    }}

建四个fragment和xml

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