Android Open Source - GroupSmart-Android Main

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License

The source code is released under:
Copyright (C) <2014> <Derek Argueta - Hunter Kehoe> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), ...
If you think the Android project GroupSmart-Android listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.dargueta.groupsmart;
//from w w  w  .j a  va  2  s . c  o  m
import java.util.ArrayList;
import java.util.HashMap;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import com.google.analytics.tracking.android.EasyTracker;

/**
 * 
 * @author Hunter Kehoe
 * 
 * Provides the activity for the "home page" of the app.
 *
 */
public class Main extends Activity {
  
  Button btnProfile, btnSettings, btnGroups, btnNewGroup;
  
  ProgressDialog pDialog;
  ArrayList<HashMap<String,String>> groups = new ArrayList<HashMap<String, String>>();
  String getGroupsURL = "";
  
  ListView lvSessionList;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    
    lvSessionList = (ListView) findViewById(R.id.lvSessionList);
    
    btnProfile = (Button) findViewById(R.id.btnProfile);
    btnSettings = (Button) findViewById(R.id.btnSettings);
    btnGroups = (Button) findViewById(R.id.btnGroups);
    btnNewGroup = (Button) findViewById(R.id.btnNewGroup);
    
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    String userId = String.valueOf(prefs.getInt(Constants.ID_KEY, -1));
    
    getGroupsURL = Constants.BASE_URL + "mode=gugla&id=" + userId;
    
    new GetGroups().execute();
    
    btnProfile.setOnClickListener(new OnClickListener() {
      
      public void onClick(View v) {
        
        Intent i = new Intent(getApplicationContext(), Profile.class);
        i.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
        startActivity(i);
      }
    });
    
    btnSettings.setOnClickListener(new OnClickListener() {
      
      public void onClick(View v) {
        
        Intent i = new Intent(getApplicationContext(), Settings.class);
        i.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
        startActivity(i);
      }
    });
    
    btnGroups.setOnClickListener(new OnClickListener() {
      
      public void onClick(View v) {
        
        Intent i = new Intent(getApplicationContext(), FindGroup.class);
        i.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
        startActivity(i);
      }
    });
    
    btnNewGroup.setOnClickListener(new OnClickListener() {
      
      public void onClick(View v) {
        
        Intent i = new Intent(getApplicationContext(), CreateGroup.class);
        i.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
        startActivity(i);
      }
    });
    
    lvSessionList.setOnItemClickListener(new OnItemClickListener() {
      
      public void onItemClick(AdapterView<?> parent, final View v, int position, long id) {
        
        if (!((TextView) v.findViewById(R.id.name)).getText().toString().equals("No groups yet")) {
          
          Intent i = new Intent(getApplicationContext(), GroupInfo.class);
          i.putExtra(Constants.ID_KEY,
                 ((TextView) v.findViewById(R.id.id)).getText().toString());
          startActivity(i);
        }
      }
    });
    
  }
  
  /**
   * 
   * @author Hunter Kehoe
   * 
   * Provides a way to asynchronously grab the groups from the remote database.
   *
   */
  private class GetGroups extends AsyncTask<Void, Void, Void> {
    
    JSONArray groupsArray = null;
    
    protected void onPreExecute() {
      
      super.onPreExecute();
      pDialog = new ProgressDialog(Main.this);
      pDialog.setMessage(getString(R.string.pleaseWait));
      pDialog.setCancelable(false);
      pDialog.show();
    }
    
    protected Void doInBackground(Void... arg0) {
      
      ServiceHandler sh = new ServiceHandler();
      String jsonStr = sh.makeServiceCall(getGroupsURL, ServiceHandler.GET);
      
      if (jsonStr != null && jsonStr.length() > 0) {
        
        try {
          
          JSONObject jsonObj = new JSONObject(jsonStr);
          groupsArray = jsonObj.getJSONArray(Constants.GROUPS_KEY);
          
          for(int i = 0; i < groupsArray.length(); i++) {
            
            JSONObject u = groupsArray.getJSONObject(i);
            int id = u.getInt(Constants.ID_KEY);
            String name = u.getString(Constants.NAME_KEY);
            String day = u.getString(Constants.DAY_KEY);
            String time = u.getString(Constants.TIME_KEY);
            String location = u.getString(Constants.LOCATION_KEY);
            //String teacher = u.getString("teacher");
            
            //if (teacher.length() == 0) {
            //  teacher = "";
            //}
            
            day = day.replaceAll(";", Constants.NORMAL_SPACE);
            
            if(!day.contains("|")) {
              
              HashMap<String,String> group = new HashMap<String,String>();
              group.put(Constants.ID_KEY, String.valueOf(id));
              group.put(Constants.NAME_KEY, name.replaceAll("\\\\",
                                      Constants.EMPTY_STRING));
              group.put(Constants.DAY_KEY, day);
              group.put(Constants.TIME_KEY, time);
              group.put(Constants.LOCATION_KEY, location.replaceAll("\\\\",
                                          Constants.EMPTY_STRING));
              //group.put("teacher", teacher);
              
              groups.add(group);
            }
          }
        } catch (JSONException e) {
          
          e.printStackTrace();
        }
        
      } else if (jsonStr.length() == 0) {
        
        HashMap<String,String> group = new HashMap<String,String>();
        group.put(Constants.NAME_KEY, "No groups yet");
        groups.add(group);
        
      } else {
        
        //Log.e("ServiceHandler", "Couldn't get any data from url");
      }
      
      return null;
    }
    
    protected void onPostExecute(Void result) {
      
      super.onPostExecute(result);
      
      if(pDialog.isShowing()) {
        
        pDialog.dismiss();
      }
      
      ListAdapter adapter = new SimpleAdapter(Main.this,
                          groups,
                          R.layout.main_list_item,
                          new String[] {
                            Constants.ID_KEY,
                            Constants.NAME_KEY,
                            Constants.TEACHER_KEY,
                            Constants.DAY_KEY,
                            Constants.TIME_KEY,
                            Constants.LOCATION_KEY
                          },
                          new int[] {
                            R.id.id,
                            R.id.name,
                            R.id.teacher,
                            R.id.day,
                            R.id.time,
                            R.id.place
                          });
      
      lvSessionList.setAdapter(adapter);
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item){
    
      switch(item.getItemId()){
      
      case R.id.actionLogout:
          SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
          SharedPreferences.Editor editor = prefs.edit();
          editor.clear();
          editor.commit();
          Intent i = new Intent(getApplicationContext(), Login.class);
          i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
          i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          startActivity(i);
          finish();
          break;
      }
      
      return super.onOptionsItemSelected(item);
  }
  
  public void onBackPressed() {
    
    super.onBackPressed();
    this.overridePendingTransition(0, 0);
  }
  
  // Google Analytics
  public void onStart() {
    
    super.onStart();
    EasyTracker.getInstance(this).activityStart(this);
  }
  
  public void onStop() {
    
    super.onStop();
    EasyTracker.getInstance(this).activityStop(this);
  }
}
Java Source Code List
