Android中TabLayout+ViewPager实现tab和页面联动效果

TabLayout+ViewPager实现tab和页面联动效果

xml中：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <android.support.design.widget.TabLayout
    android:id="@+id/toolbar_tl_tab"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:layout_gravity="bottom"
    app:layout_scrollFlags="scroll"
    app:tabIndicatorColor="@android:color/holo_green_light"
    app:tabSelectedTextColor="@android:color/holo_green_light" />

  <View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#f0f0f0" />

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

代码中使用：

public class MainActivity extends AppCompatActivity {

  private TabLayout toolbar_tl_tab;
  private ViewPager vp_container;
  private String[] titles = {"标题1", "标题2", "标题3", "标题4"};

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    init();
  }

  private void init() {
    toolbar_tl_tab = (TabLayout) findViewById(R.id.toolbar_tl_tab);
    vp_container = (ViewPager) findViewById(R.id.vp_container);
    toolbar_tl_tab.setupWithViewPager(vp_container);
    toolbar_tl_tab.setTabMode(TabLayout.MODE_SCROLLABLE);
    vp_container.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) {
      @Override
      public Fragment getItem(int position) {
        return new PageFragment();
      }

      @Override
      public CharSequence getPageTitle(int position) {
        return titles[position];
      }

      @Override
      public int getCount() {
        return titles.length;
      }
    });
  }

}

碎片：PageFragment

public class PageFragment extends Fragment {
  @Nullable
  @Override
  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_page, null);
    return view;
  }
}

碎片xml：fragment_page.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:orientation="vertical">

  <TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:text="页面" />
</LinearLayout>

注意：

1、模式相关

使用滚动模式，特点是超过屏幕可以滚动显示：

toolbar_tl_tab.setTabMode(TabLayout.MODE_SCROLLABLE);

使用屏幕等分模式，特点是显示tab的宽度是屏幕等分后的宽度：

toolbar_tl_tab.setTabMode(TabLayout.MODE_FIXED);

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