Android Open Source - android-weather-demo-application Select Country Fragment

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License

The source code is released under:

GNU General Public License

Java Source Code

package org.openweathermap.fragment;
//  w  ww.j  ava2  s  .  c  o  m
import org.openweathermap.activity.MainActivity;
import org.openweathermap.adapter.CityAdapter;
import org.openweathermap.asynctask.GetCitiesAsyncTask;
import org.openweathermap.asynctask.SearchCitiesAsyncTask;
import org.openweathermap.asynctask.base.BaseAsyncTask;
import org.openweathermap.asynctask.base.BaseAsyncTask.AsyncCallback;
import org.openweathermap.asynctask.base.BaseResponse;
import org.openweathermap.asynctask.param.SearchCitiesParam;
import org.openweathermap.asynctask.response.GetCitiesResponse;
import org.openweathermap.sql.model.CityModel;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

import com.ink.weather.R;

/**
 * This class is the Fragment assigned to the MainActivity NavigationDrawer, 
 * it contains a list of popular cities and a search field that allows the user
 * to enter a custom city that has not been defined. When a city has been selected (or found),
 * the requestWeatherInformation_Start() method of MainActivity is executed and the 
 * NavigationDrawer is closed.
 * @author samkirton
 */
public class SelectCountryFragment extends Fragment implements OnItemClickListener, OnClickListener, AsyncCallback, TextWatcher {
  private EditText uiSearchEditText;
  private ListView uiPopularCityListView;
  private Button uiPopularCityNoResultsButton;
//  private ProgressBar uiPopularCityLoadingProgressBar;
  
  private GetCitiesAsyncTask mGetCitiesAsyncTask;
  private SearchCitiesAsyncTask mSearchCitiesAsyncTask;
  
  @Override
  public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_select_country, container, false);
    
    uiSearchEditText = (EditText)view.findViewById(R.id.fragment_select_city_search_edittext);
    uiPopularCityListView = (ListView)view.findViewById(R.id.fragment_select_country_popular_city_list);
    uiPopularCityNoResultsButton = (Button)view.findViewById(R.id.fragment_select_country_popular_city_no_results);
//    uiPopularCityLoadingProgressBar = (ProgressBar)view.findViewById(R.id.fragment_select_country_popular_city_loading);
    
    uiSearchEditText.setOnClickListener(this);
    uiSearchEditText.addTextChangedListener(this);
    uiPopularCityNoResultsButton.setOnClickListener(this);
    uiPopularCityListView.setOnItemClickListener(this);

//    setLoadingView();
    
    return view;
  }
  
  @Override
  public void onResume() {
    super.onResume();
    uiSearchEditText.setText("");
  }
  
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    
    mGetCitiesAsyncTask = new GetCitiesAsyncTask(getActivity());
    mGetCitiesAsyncTask.setAsyncCallback(this);
    mGetCitiesAsyncTask.runTask(null);
  }
  
  /**
   * Sets the loading view
   */
//  private void setLoadingView() {
//    uiPopularCityListView.setEmptyView(uiPopularCityLoadingProgressBar);
//    uiPopularCityListView.setAdapter(null);
//  }
//  
  /**
   * Sets the no results empty view
   */
  private void setEmptyView() {
    uiPopularCityListView.setEmptyView(uiPopularCityNoResultsButton);
  }
  
  /**
   * Notify the activity that it should start looking for 
   * new weather information based on the provided city argument  
   */
  private void requestWeatherInformation(String cityQueryString) {
    MainActivity mainActivity = (MainActivity)getActivity();
    mainActivity.requestWeatherInformation_Start(cityQueryString);
  }
  
  /**
   * Start looking for new weather information based on the search string
   */
  private void search(String searchTerm) {
//    setLoadingView();
    
    SearchCitiesParam searchCitiesParam = new SearchCitiesParam();
    searchCitiesParam.setSearchTerms(searchTerm);
    
    mSearchCitiesAsyncTask = new SearchCitiesAsyncTask(getActivity());
    mSearchCitiesAsyncTask.setAsyncCallback(this);
    mSearchCitiesAsyncTask.runTask(searchCitiesParam);
  }
  
  /**
   * Populate the ListView with a CityModel array
   * @param  cityModelArray  The CityModel[] to populate the ListView with
   */
  private void populateListView(CityModel[] cityModelArray) {
    CityAdapter cityArrayAdapter = new CityAdapter(getActivity(), cityModelArray);
    uiPopularCityListView.setAdapter(cityArrayAdapter);
    setEmptyView();
  }

  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    if (parent == uiPopularCityListView) {
      CityModel cityModel = (CityModel)parent.getItemAtPosition(position);
      String cityQueryString = cityModel.getName() + ", " + cityModel.getCountry();
      requestWeatherInformation(cityQueryString);
    }
  }

  @Override
  public void onClick(View v) {
    if (v == uiSearchEditText) {
      uiSearchEditText.setText("");
    } else if (v == uiPopularCityNoResultsButton) {
      requestWeatherInformation(uiSearchEditText.getText().toString());
    }
  }

  @Override
  public void onAsyncTaskFinished(BaseResponse response, BaseAsyncTask asyncTask) {
    if (asyncTask == mGetCitiesAsyncTask) {
      GetCitiesResponse getCitiesResponse = (GetCitiesResponse)response;
      populateListView(getCitiesResponse.getCityModelArray());
    } else if (asyncTask == mSearchCitiesAsyncTask) {
      GetCitiesResponse getCitiesResponse = (GetCitiesResponse)response;
      populateListView(getCitiesResponse.getCityModelArray());
    }
  }

  @Override
  public void afterTextChanged(Editable s) {
    search(s.toString());
  }

  @Override
  public void beforeTextChanged(CharSequence s, int start, int count, int after) { }

  @Override
  public void onTextChanged(CharSequence s, int start, int before, int count) { }
}

Java Source Code List

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