Question

Hello Friends我在listitem点击程序中使用listView执行下面的代码，但是作为Listview有很多listitem会调用不同的WEBPAGES 对于不同的网页我必须创建不同的Fragment.xml和Framgment.java文件???或者我可以保留一个公共片段和xml文件，并在列表项状态的帮助下，我可以调用不同的网页！请在这件事上给予我帮助作为我在android中的初学者谢谢

fragment.xml之

<!-- TODO: Update blank fragment layout -->

<WebView
    android:id="@+id/webViewabout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

Fragment.java

 package com.ft.bscit;


    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.webkit.WebChromeClient;
    import android.webkit.WebView;

    import com.ft.bscit.R;

    /**
     * A simple {@link Fragment} subclass.
     */
    public class About_bscit_Fragment extends Fragment {


        public About_bscit_Fragment() {
            // Required empty public constructor
        }


        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            // Inflate the layout for this fragment
            View rootView = inflater.inflate(R.layout.fragment_about_bscit, container, false);

            WebView webView = (WebView)rootView.findViewById(R.id.webViewabout);

            webView.getSettings().setJavaScriptEnabled(true);
            webView.setWebChromeClient(new WebChromeClient());
            webView.loadUrl("file:///android_asset/index.html");

            return rootView;
        }

    }

Answer 1

您可以在实例化片段时发送public interface CityRepository extends PagingAndSortingRepository<City, Integer>, JpaSpecificationExecutor<City> { }。

@Service
@Transactional
public class CityService {

    @Autowired
    private CityRepository cityRepository;

    @Transactional(readOnly = true)
    public CityListVO findByNameLike(String name, PageRequest pageRequest) {
        name = "%" + name + "%";

        if (pageRequest == null) {
            List<City> result = cityRepository.findAll(fillGridCriteria(name));
            return new CityListVO(1, result.size(), result);
        } else {
            Page<City> result = cityRepository. findAll(fillGridCriteria(name), pageRequest);
            return new CityListVO(result.getTotalPages(), result.getTotalElements(), result.getContent());
        }

    }

    private static Specification<City> fillGridCriteria(String name) {
        return new Specification<City>() {

            @Override
            public Predicate toPredicate(
                    Root<City> root,
                    CriteriaQuery<?> query,
                    CriteriaBuilder builder) { 

             /*
                The current return I can do a like by name, and it works fine. 

                My problem is if for any reason I need to do multiple joins like the folow jpql: 
                select ci FROM City ci, State st, Country co where ci.st = st AND st.co = co AND co.name = 'Canada';

                How to do this from here ? Inside this method.
                How is gonna be the return for this method ?

             */

                return builder.like(root.get("name"), name.trim());
            }

        };
    }

}

其中url在case R.id.button1: //what to put here About_bscit_Fragment fragment = About_bscit_Fragment.newInstance("your-url-value"); FragmentManager fm = getFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); ft.replace(R.id.fragment_container, fragment); ft.commit(); break; } -

中定义

newInstance()

在Fragment的About_bscit_Fragment中，您可以在实例化时获取您发送的值 -

public static About_bscit_Fragment newInstance(String url) {
        About_bscit_Fragment fragment = new About_bscit_Fragment();
        Bundle args = new Bundle();
        args.putString("key_url", url);
        fragment.setArguments(args);
        return fragment;
    }

加载它 -

onViewCreated()

Answer 2

package com.forever.technology.bscit;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.forever.technology.bscit.R;

/**
 * A simple {@link Fragment} subclass.
 */
public class Sem1Fragment_list extends ListFragment {




    public Sem1Fragment_list() {
        // Required empty public constructor
    }
    ListView lv;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_sem1_list, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        ArrayAdapter adapter = ArrayAdapter.createFromResource(getActivity(),
                R.array.sem1, android.R.layout.simple_list_item_1);
        setListAdapter(adapter);

    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        switch (position)
        {
            case 0:
                Intent intent = new Intent(getActivity().getApplicationContext(),Subject1Activity.class);
                startActivity(intent);

            case 1:

        }

    }
}

如何保持单个FRAGMENT以查看多个WebPages

2 个答案: