ViewPager附加Fragment

最新推荐文章于 2025-05-17 09:42:08 发布

原创最新推荐文章于 2025-05-17 09:42:08 发布 · 158 阅读

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本文详细介绍如何使用Android的TabLayout和ViewPager实现标签页切换功能。通过实例代码展示了组件的基本用法，包括初始化视图、设置适配器及配置Tab标签等步骤。

<android.support.design.widget.TabLayout
    android:id="@+id/tab"
    android:layout_width="match_parent"
    android:layout_height="60dp"></android.support.design.widget.TabLayout>

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

private TabLayout tab;
private ViewPager viewpager;
private AFragment aFragment;
private BFragment bFragment;
private ArrayList<Fragment> fragmentList=new ArrayList<>();
private MyAdapter adapter;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
    initData();
    initAdapter();
   initTab();
}

private void initTab() {
    tab.setupWithViewPager(viewpager);
    tab.getTabAt(0).setText("哈哈");
    tab.getTabAt(1).setText("呵呵");
}

private void initAdapter() {

    adapter=new MyAdapter(getSupportFragmentManager(),fragmentList);
    viewpager.setAdapter(adapter);
}

private void initData() {
    aFragment=new AFragment();
    bFragment=new BFragment();
    fragmentList.add(aFragment);
  fragmentList.add(bFragment);

}

private void initView() {
    tab = (TabLayout) findViewById(R.id.tab);
    viewpager = (ViewPager) findViewById(R.id.viewpager);
}

public class MyAdapter extends FragmentPagerAdapter
 private ArrayList<Fragment> arrayList; public MyAdapter(FragmentManager fm, ArrayList<Fragment> arrayList) { super(fm);
this.arrayList = arrayList;

    }

    @Override
    public Fragment getItem(int position) {
        return arrayList.get(position);
    }

    @Override
    public int getCount() {
        return arrayList.size();
    }
}