Android Open Source - Android-App-Project___Partner-Finder Event List Activity

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License

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Apache License

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Java Source Code

package com.google.cloud.backend.ui;
/*ww w. j a va 2 s  . c  om*/
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.widget.ListView;

import com.google.cloud.backend.R;
import com.google.cloud.backend.core.CloudBackendAsync;
import com.google.cloud.backend.core.CloudBackendFragment;
import com.google.cloud.backend.core.CloudBackendMessaging;
import com.google.cloud.backend.core.CloudCallbackHandler;
import com.google.cloud.backend.core.CloudEntity;
import com.google.cloud.backend.core.CloudQuery;
import com.google.cloud.backend.core.CloudQuery.Order;
import com.google.cloud.backend.core.CloudQuery.Scope;

/**
 * Activity to show all the items from cloud storage in a list
 *
 */
public class EventListActivity extends Activity {

  //Variable declaration 
  private CloudBackendAsync cloudBackend;
  private List<CloudEntity> mPosts;
  private ListView listView;
  private ProgressDialog progressDialog;
  private int index=0;


  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.eventlist_screen);

    //Initializing UI components
    listView = (ListView) findViewById(R.id.events_listview);

    progressDialog = ProgressDialog.show(EventListActivity.this, "", "Please wait...");

    //CloudBackendAsync class instance creation to get the list of data
    cloudBackend = new CloudBackendAsync(EventListActivity.this);

    //Query to get the data from particular Kind/table
    CloudQuery cq = new CloudQuery(CloudBackendMessaging.KIND_NAME_CLOUD_MESSAGES);
    //Setting scope
    cq.setScope(Scope.FUTURE_AND_PAST);
    //Setting order of the list item according to date of creation
    cq.setSort("date",Order.DESC);//(CloudEntity.PROP_CREATED_AT, Order.DESC);

    //Executing Cloud query
    cloudBackend.list(cq, new CloudCallbackHandler<List<CloudEntity>>() {

      @Override
      public void onComplete(List<CloudEntity> results) {
        mPosts = results;

        deleteEvent(mPosts);
        
        progressDialog.dismiss();

        //Calling EventListAdaptor to create list
        EventListAdaptor eventListAdaptor = new EventListAdaptor(EventListActivity.this, mPosts);
        listView.setAdapter(eventListAdaptor);
        eventListAdaptor.notifyDataSetChanged();

        
      }
    });
  }
  
  public void deleteEvent(List<CloudEntity> list){
    final CloudBackendMessaging cloudBackendMessaging = new CloudBackendMessaging(EventListActivity.this);

    
    for(int i=0;i<list.size();i++){
      index = i;
      CloudEntity ce = list.get(i);
      
      HashMap<String, Object> map = (HashMap<String, Object>) ce.getProperties();
      
      final String id = ce.getId();
      
      String eventDate = (String) map.get("date"); 
      
      SimpleDateFormat sdf = new SimpleDateFormat("yyyy/M/dd", new Locale("US"));
      String currentDate = sdf.format(new Date());
      
      if(eventDate.compareTo(currentDate)<0){
        //Thread to delete all records from the Kind/table. Used only once as thread is not using start() method now
        new Thread(new Runnable() {

          @Override
          public void run() {
            try {
              cloudBackendMessaging.delete(CloudBackendMessaging.KIND_NAME_CLOUD_MESSAGES, id);
              mPosts.remove(index);
            } catch (IOException e) {
              e.printStackTrace();
            }

          }
        }).start();
      }
    }
    
  }
}

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