android - 在 ViewPager 中使用相同的片段类

Question

我有一个ViewPager，我想在每个页面中使用相同的Fragment，并使用不同的变量。但是当我这样做时，只有一页 ViewPager 正在查看，其他页面是空白的。我怎样才能做到这一点？我无法为每个选项卡创建不同的布局，因为我想动态添加它们。

ViewPagerAdapter：

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

class FragmentStoreTabPageAdapter extends FragmentPagerAdapter {
    String[] pageTitles = {"Y","Z","X"};
    public FragmentStoreTabPageAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        return FragmentStorePages.newInstance(pageTitles[position],position);
    }

    @Override
    public int getCount() {
        return 3;
    }

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

包含 ViewPager 的主片段：

public class FragmentStore extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_store,container,false);
        ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewpager_store);
        viewPager.setAdapter(new FragmentStoreTabPageAdapter(getChildFragmentManager()));
        TabPageIndicator tpi = (TabPageIndicator) view.findViewById(R.id.indicator_store);
        tpi.setViewPager(viewPager);
        return view;
    }

}

ViewPager 中使用的 Fragment：

public class FragmentStorePages extends Fragment implements ReplaceListener {
    String categoryName;
    int categoryId;
    public static FragmentStorePages newInstance(String categoryName, int categoryId){
        FragmentStorePages fsp = new FragmentStorePages();
        Bundle args = new Bundle();
        args.putString("categoryName", categoryName);
        args.putInt("categoryId", categoryId);
        fsp.setArguments(args);
        return fsp;
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_store_pages,container,false);
        Bundle args = getArguments();
        categoryName = args.getString("categoryName");
        categoryId = args.getInt("categoryId");
        getFragmentManager().beginTransaction().replace(R.id.fragment_store_pages,FragmentStoreSubCategories.newInstance(categoryName),"SubCategoryFragment").commit();
        return view;
    }

    @Override
    public void onReplace(Bundle args) {

    }
}

Answer 1

使用这个PagerAdapter

class FragmentStoreTabPageAdapter extends FragmentPagerAdapter {
    String[] pageTitles = {"Y","Z","X"};
    public FragmentStoreTabPageAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        FragmentStorePages fsp = new FragmentStorePages();
        Bundle args = new Bundle();
        args.putString("categoryName", categoryName);
        args.putInt("categoryId", categoryId);
        fsp.setArguments(args);
        return fsp;
    }

    @Override
    public int getCount() {
        return 3;
    }

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

使用这个Fragment

public class FragmentStorePages extends Fragment implements ReplaceListener {
    String categoryName;
    int categoryId;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_store_pages,container,false);
        Bundle args = getArguments();
        if(args!=null && args.containsString("categoryName")&& args.containsString("categoryId")){
        categoryName = args.getString("categoryName");
        categoryId = args.getInt("categoryId");
        }           
        return view;
    }

    @Override
    public void onReplace(Bundle args) {

    }
}