Question

我有一个tabLayout，附带4个四个标签（片段），并附有活动内FragmentPagerAdapter的支持。

我想使用附加的导航视图导航到标签页。单击导航视图中的项目时如何转到选项卡。

然后如何使用新片段删除当前的四个选项卡（使用tablayout附加）。

附加碎片：

private void setupViewPager(ViewPager viewPager) {
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
    adapter.addFragment(new OfferFragment(), "OFFERS");
    adapter.addFragment(new BookedHistoryFragment(), "Booked History");
    adapter.addFragment(new ReviewFragment(), "Reviews");
    adapter.addFragment(new AvailableRoomFragment(), "Available");
    viewPager.setAdapter(adapter);
}

Sub classAdapter添加片段。

class ViewPagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    public ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

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

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

    public void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }
}

导航视图操作：

mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(MenuItem menuItem) {
            mDrawerLayout.closeDrawers();
            if (menuItem.getItemId() == R.id.nav_item_offers) {
                int tabCount= tabLayout.getTabCount();
                // I want to move to other tab.

                Toast.makeText(getApplicationContext(),"First",Toast.LENGTH_SHORT).show();
//                    Intent intent = new Intent(getApplicationContext(), Booking.class);
//                    startActivity(intent);
            }
            else if (menuItem.getItemId() == R.id.nav_item_avail_room) {
                 // Then I want to remove Four tabs and call a new fragment.
                   Toast.makeText(getApplicationContext(),"Second",Toast.LENGTH_SHORT).show();
            }
            return false;
        }

    });

Answer 1

在导航视图中单击项目时，只需告诉选项卡索引。代码如下。

对于第二个问题，我开始了新的活动并附加了片段。

mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
    @Override
    public boolean onNavigationItemSelected(MenuItem menuItem) {
        mDrawerLayout.closeDrawers();
        if (menuItem.getItemId() == R.id.nav_item_offers) {
            TabLayout.Tab tab = tabLayout.getTabAt(2);
            tab.select();
        }
        else if (menuItem.getItemId() == R.id.nav_item_avail_room) {
             // Here I started a new activity and attached fragment.
        }
        return false;
    }

});

使用选项卡布局的导航视图，单击导航视图项目转到选项卡（片段）

1 个答案: