Question

我构建了一个使用标签进行导航的Android应用程序。我正在为大多数应用程序使用片段，但是我需要显示一个活动。如何在案例2中显示活动。下面是我目前的代码，我知道它会返回一个片段但是如何启用这两个片段？

public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            // getItem is called to instantiate the fragment for the given page.
            // Return a PlaceholderFragment (defined as a static inner class below).
            System.out.println("current position = " + position);
            Fragment fragment = null;
            switch(position){

                case 0:
                    return new diaryFragment();
                case 1:
                    return new newEntryFragment();
                case 2:
                    return new Calendarnew();
        }


          return null;

        }

Answer 1

private void displayView(int position) {
        // update the main content by replacing fragments
        Fragment fragment = null;
        switch (position) {
        case 0:

            fragment = new diaryFragment();

            break;
        case 1:

            fragment = new newEntryFragment();

        case 2:

            fragment = new Calendarnew();
            break;

        default:
            break;
        }

        if (fragment != null) {
            FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.beginTransaction()
                    .replace(R.id.frame_container, fragment).commit();


        } else {
            // error in creating fragment
            Log.e("MainActivity", "Error in creating fragment");
        }

Answer 2

嗨，我实际上并没有得到你想要的东西，但尝试阅读这个，也许它可以以某种方式解决你的问题。 https://stackoverflow.com/a/2958586/4470313

如何在fragment switch语句中显示活动

2 个答案: