我可以在Tab View的ViewPager中的每个页面中分开Java类文件吗?

Question

我从Android Studio导入了选项卡活动。在静态占位符片段下，我有弹药的视图，并且为每个选项卡进行了切换的外壳，并为每个选项卡提供了单独的布局。我想在选项卡视图中的每个页面中的每个页面中的单独Java类工作。我可以将每个案例分开以分开吗？

public static class PlaceholderFragment extends Fragment {
        /**
         * The fragment argument representing the section number for this
         * fragment.
         */
        private static final String ARG_SECTION_NUMBER = "section_number";
        public PlaceholderFragment() {
        }
        /**
         * Returns a new instance of this fragment for the given section
         * number.
         */
        public static PlaceholderFragment newInstance(int sectionNumber) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(ARG_SECTION_NUMBER, sectionNumber);
            fragment.setArguments(args);
            return fragment;
        }
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
         int tabNumber= getArguments().getInt(ARG_SECTION_NUMBER);
          switch (tabNumber)  {
            case 1: {
                View rootView = inflater.inflate(R.layout.tab1, container, false);

                return rootView;
            }
              case 2: {
                  View rootView = inflater.inflate(R.layout.tab2, container, false);

                  return rootView;
              }
              case 3: {
                  View rootView = inflater.inflate(R.layout.tab3, container, false);


                  return rootView;
              }

Answer 1

private class DesignDemoPagerAdapter extends FragmentStatePagerAdapter {
        public DesignDemoPagerAdapter(FragmentManager fm) {
            super(fm);
        }
        @Override
        public Fragment getItem(int position) {
            //
            if (position == 0) {
                    BaseFragment f = new SalesBlankTab();
                    salesStack.get(AppConstant.SALES_REPORT_TAB).push(f);
                    return f;
            } else if (position == 1) {
                    BaseFragment f = new MemberBlankTab();
                    salesStack.get(AppConstant.MEMBER_ORDER).push(f);
                    return f;
            } else {
                BaseFragment f = new  StockBlankTab();//MemberBlankTab,StockBlankTab
                salesStack.get(AppConstant.STOCK_MANAGEMENT).push(f);
                return f;
            }
        }
        @Override
        public int getCount() {
            return AppConstant.TAB_COUNT;
        }
    }

Answer 2

所以rishav有一个geitem方法，它返回变量为超级。（.....）

只需在这个地方返回片段。

@Override
 public Fragment getItem(int i) 
{ Fragment fragment;
 switch(i){ 
case 0: fragment = new MyFragment1(); 
break; 
case 1: fragment = new MyFragment2(); 
break; 
case 2:
 fragment = new MyFragment3(); break; 
default: 
throw new IllegalArgumentException("Invalid section number"); } 
return fragment; }

Answer 3

您可以做这样的事情（来自Android Hive）：

public class MainActivity extends AppCompatActivity {
    private Toolbar toolbar;
    private TabLayout tabLayout;
    private ViewPager viewPager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        setupViewPager(viewPager);
        tabLayout = (TabLayout) findViewById(R.id.tabs);
        tabLayout.setupWithViewPager(viewPager);
    }
    private void setupViewPager(ViewPager viewPager) {
        ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
        adapter.addFragment(new OneFragment(), "ONE");
        adapter.addFragment(new TwoFragment(), "TWO");
        adapter.addFragment(new ThreeFragment(), "THREE");
        viewPager.setAdapter(adapter);
    }
    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);
        }
    }
}

有关更多详细信息，您可以尝试此链接：http：//www.androidhive.info/2015/09/android-material-material-design-working-with-with-tabs/