Android Open Source - passby Locate Activity

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License

The source code is released under:

Copyright 2014 Firebase, https://www.firebase.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ?Software??...

Java Source Code

//#CSIT6000B#  Rio He       20227977 yheas@connect.ust.hk
//#CSIT6000B#  Cedric Liang 20220395 zliangag@connect.ust.hk
//#CSIT6000B#  Kevin Wang   20225577 zwangbo@connect.ust.hk 
package com.firebase.client;
//from w ww  .j  a v  a  2s  .  c  o m
import com.firebase.androidchat.R;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class LocateActivity extends Activity {
  
  private LocationManager locationManager;
  //private StringBuffer sb = new StringBuffer();
  private Location location;
  private double x;
  private double y;
  
  private final double CLASS_2464_Y = 114.26333902908577;
  private final double CLASS_2464_X = 22.33760550858573;
  
  private final double CLASS_LSK_Y = 114.26464130298577;
  private final double CLASS_LSK_X = 22.33347407989984;
  
  private final double CLASS_4619_Y = 114.26401378535724;
  private final double CLASS_4619_X = 22.335136092645868;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_locate);
    
    x = 0.0;
    y = 0.0;
    
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,  
                2000, 8, new LocationListener() {  
  
                    @Override  
                    public void onStatusChanged(String provider, int status,  
                            Bundle extras) {  
                    }

          @Override
          public void onLocationChanged(Location location) {
            // TODO Auto-generated method stub
            location = locationManager  
                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
          }

          @Override
          public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub
            location = locationManager  
                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
          }

          @Override
          public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub
            
          }  
                });  
    
    Button manualLocate = (Button) findViewById(R.id.manualLocate);
    Button autoLocate = (Button) findViewById(R.id.autoLocate);
    
    manualLocate.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        EditText et = (EditText) findViewById(R.id.editLocate);
        
        // jump to search result activity, show search result
        Intent intent = new Intent(LocateActivity.this, SearchResultActivity.class);
        intent.putExtra("u_room", et.getText().toString());
        LocateActivity.this.startActivity(intent);
      }
    });
    
    autoLocate.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        location = locationManager  
                    .getLastKnownLocation(LocationManager.GPS_PROVIDER);
        //get the locate 
        if (location != null) {   
                //sb.append("????????????\n?????");  
                //sb.append(location.getLongitude());  
                //sb.append("\n????");  
                //sb.append(location.getLatitude());  
                x = location.getLatitude();
                y = location.getLongitude();
            } else {  
                // ????????Location????????????EditText  
                //sb.append("nonono");
                x = 0;
                y = 0;
            }
        //Log.i("location", sb.toString());
        double distance_2464 = Math.pow(x - CLASS_2464_X, 2) + Math.pow(y - CLASS_2464_Y, 2);
        double distance_lsk = Math.pow(x - CLASS_LSK_X, 2) + Math.pow(y - CLASS_LSK_Y, 2);
        double distance_4619 = Math.pow(x - CLASS_4619_X, 2) + Math.pow(y - CLASS_4619_Y, 2);
        // jump to search result activity, show search result
        if(distance_2464 <= distance_lsk && distance_2464 <= distance_4619){
          Intent intent = new Intent(LocateActivity.this, SearchResultActivity.class);
          intent.putExtra("u_room", "Academic");
          LocateActivity.this.startActivity(intent);
        }
        else if(distance_lsk <= distance_2464 && distance_lsk <= distance_4619){
          Intent intent = new Intent(LocateActivity.this, SearchResultActivity.class);
          intent.putExtra("u_room", "lsk");
          LocateActivity.this.startActivity(intent);
        }
        else{
          Intent intent = new Intent(LocateActivity.this, SearchResultActivity.class);
          intent.putExtra("u_room", "Enterprise");
          LocateActivity.this.startActivity(intent);
        }
        
      }
    });
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();  
      inflater.inflate(R.menu.menu, menu);  
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if(item.getItemId() == R.id.app_settings){
      Intent intent = new Intent(this, SettingActivity.class);
      startActivity(intent);
    }
      
    return true;
  }
  
  
}

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