Question

我有主要活动和五个片段。在主要活动中我定义工具栏。在每个片段中，我都有一个包含JSON数据的listview（我使用volley labrary从JSON获取数据）。

1 即可。我想使用微调器过滤数据，即使用微调器我选择特定的＆＃34; city＆＃34;并在我的listview中显示只选择listview项目。那么如何实现呢？

2 。所有片段都从一个JSON中获取数据，并且所有片段都显示相似的数据。我希望当一个微调器项从一些片段中选择时它影响到其他片段，即如果在一些片段中选择了＆＃34; mycity＆＃34;在其他片段中必须只显示带有＆＃34; mycity＆＃34;的listview项目。如何改变呢？

我尝试这样做，但无效。任何想法，帮助对我来说都很重要。对不起英语不好

MainActivity

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.mainactivity);

    toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayShowTitleEnabled(false);

    viewPager = (ViewPager) findViewById(R.id.viewpager);
    setupViewPager(viewPager);

    tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);

    //Checkong internet connect
    final ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    final NetworkInfo activeNetwork = conMgr.getActiveNetworkInfo();
    if (activeNetwork != null && activeNetwork.isConnected()) {

    } else {
        Toast.makeText(this, "Проверьте соединение с интернотом" , Toast.LENGTH_LONG).show();
    }
}

/**
 * Adding fragments to ViewPager
 * @param viewPager
 */
private void setupViewPager(ViewPager viewPager) {
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
    adapter.addFrag(new MainFragment(),"Все обьявления");
    adapter.addFrag(new OneFragment(), "Нужен помощь" );
    adapter.addFrag(new TwoFragment(), "Потеряно" );
    adapter.addFrag(new ThreeFragment(), "Найдено" );
    adapter.addFrag(new FourFragment(), "Отдам даром" );
    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 addFrag(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);

    }

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

}

MainFragment

public class MainFragment extends Fragment {

// Log tag
private static final String TAG = "zhaksyadam";
public static String region="Алматы";
// Movies json url
private static final String url = "http://zhaksy-adam.kz/api/Requisitions/GetRequisition";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();
private ListView listView;
private CustomListAdapter adapter;
Spinner spinner;

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

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_one, container, false);
    listView = (ListView) rootView.findViewById(R.id.list);
    adapter = new CustomListAdapter(getActivity(), movieList);
    listView.setAdapter(adapter);

    //adding spinner

    ((AppCompatActivity)getActivity()).getSupportActionBar().setDisplayShowCustomEnabled(true);
    LayoutInflater inflator = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View vi = inflator.inflate(R.layout.spinnerwound, null);
    spinner = (Spinner) vi.findViewById(R.id.spin);
    ArrayAdapter<CharSequence> spinneradapter = ArrayAdapter.createFromResource(getActivity(),
            R.array.planets_array, R.layout.spinner_item);
    spinner.setAdapter(spinneradapter);
    ((AppCompatActivity)getActivity()).getSupportActionBar().setCustomView(vi);


    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            region = parent.getItemAtPosition(position).toString();
            Log.d(TAG,"MainFragment:"+region);
            // Creating volley request obj
            final JsonArrayRequest movieReq = new JsonArrayRequest(url,
                    new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {
                            hidePDialog();
                            if (movieList != null)
                                movieList.clear();
                            // Parsing json
                            for (int i = 0; i < response.length(); i++) {
                                try {
                                    JSONObject obj = response.getJSONObject(i);
                                    Movie movie = new Movie();

                                    String city_json = obj.getString("city");

                                    if (region.equals(city_json)) {
                                        String img = obj.getString("Picture1");
                                        if (img != null) {
                                            img = "http://zhaksy-adam.kz" + img;
                                            img = img.replace("~/", "/");
                                            img = img.replace(" ", "%20");
                                        }
                                        String date = obj.getString("Date");
                                        String[] s = date.split("T");

                                        movie.setTitle(obj.getString("Title"));
                                        movie.setThumbnailUrl(img);
                                        movie.setName(obj.getString("FullName"));
                                        movie.setYear(s[0]);
                                        movie.setRegion(obj.getString("region"));
                                        movie.setCity(obj.getString("city"));
                                        movie.setDescription(obj.getString("Description"));
                                        movie.setMobile(obj.getString("Phone1"));
                                        movie.setMail(obj.getString("E_mail"));
                                        movie.setType(obj.getString("type"));


                                        // adding movie to movies array
                                        movieList.add(movie);
                                    }

                                } catch (JSONException e) {
                                    e.printStackTrace();
                                }

                            }

                            // notifying list adapter about data changes
                            // so that it renders the list view with updated data
                            adapter.notifyDataSetChanged();
                        }
                    }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    VolleyLog.d(TAG, "Error: " + error.getMessage());
                    hidePDialog();

                }
            });
            AppController.getInstance().addToRequestQueue(movieReq);
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });

    // Showing progress dialog before making http request
    pDialog = new ProgressDialog(getActivity());
    pDialog.setMessage("Loading...");
    pDialog.show();

    return rootView;
}


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

@Override
public void onDestroy() {
    super.onDestroy();
    hidePDialog();
}

private void hidePDialog() {
    if (pDialog != null) {
        pDialog.dismiss();
        pDialog = null;
    }
}

}

如何使用Spinner过滤从JSON中获取的片段中的数据

0 个答案: