Android Open Source - android-gps- Location Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.droid.waterhub;
//from   ww w.  j av a2 s. co  m
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;

import android.location.LocationListener;
import android.os.Bundle;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
 
import org.json.JSONObject;


//import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.droid.waterhub.PlaceJSONParser;
import com.droid.waterhub.R;


import android.app.Dialog;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class LocationActivity extends FragmentActivity implements LocationListener {

  GoogleMap mGoogleMap;
    Spinner mSprPlaceType;
 
    String[] mPlaceType=null;
    String[] mPlaceTypeName=null;
 
    double mLatitude=0;
    double mLongitude=0;
    
    
    @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_location);
    
    Intent intent = getIntent();
    String cat_id = intent.getStringExtra("selected");
    Log.d ("value= " , cat_id);
    
    int category ; 
    if(cat_id == "1")
    {
      category = 1; 
    }
    else 
    {
      category = 2;
    }
     // Getting Google Play availability status
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
        if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available
          
          int requestCode = 10;
            Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
            dialog.show();
        }else
        {
          // Getting reference to the SupportMapFragment
            SupportMapFragment fragment = ( SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
 
            // Getting Google Map
            mGoogleMap = fragment.getMap();
 
            // Enabling MyLocation in Google Map
            mGoogleMap.setMyLocationEnabled(true);
 
            // Getting LocationManager object from System Service LOCATION_SERVICE
            LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
 
            // Creating a criteria object to retrieve provider
            Criteria criteria = new Criteria();
 
            // Getting the name of the best provider
            String provider = locationManager.getBestProvider(criteria, true);
 
            // Getting Current Location From GPS
            Location location = locationManager.getLastKnownLocation(provider);
            if(location!=null){
                onLocationChanged(location);
            }
 
            locationManager.requestLocationUpdates(provider, 20000, 0, this);
            
            //int selectedPosition = mSprPlaceType.getSelectedItemPosition();
            //String type = mPlaceType[selectedPosition];
           // mLatitude= 23.709993;
           // mLongitude = 90.407333;
            
           // StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
           
            
            StringBuilder sb = new StringBuilder("http://technoturbine.com/lbs/index.php/services/get_nearyby_info?");
            sb.append("lat="+mLatitude);
            sb.append("lng="+mLongitude);
            sb.append("&radius=0");
            sb.append("&categories=1");
            sb.append("&offset=0");
            sb.append("&limit=20");
            
            //categories=1&offset=0&limit=20
            //sb.append("location="+mLatitude+","+mLongitude);
            
            //sb.append("&types="+type);
            //sb.append("&sensor=true");
            //sb.append("&key=YOUR_API_KEY");

            // Creating a new non-ui thread task to download json data
            PlacesTask placesTask = new PlacesTask();

            // Invokes the "doInBackground()" method of the class PlaceTask
            placesTask.execute(sb.toString());
            
            
        }
    
    
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    //getMenuInflater().inflate(R.menu.location, menu);
    return true;
  }
  
  /** A method to download json data from url */
    private String downloadUrl(String strUrl) throws IOException{
        String data = "";
        InputStream iStream = null;
        HttpURLConnection urlConnection = null;
        try{
            URL url = new URL(strUrl);
 
            // Creating an http connection to communicate with url
            urlConnection = (HttpURLConnection) url.openConnection();
 
            // Connecting to url
            urlConnection.connect();
 
            // Reading data from url
            iStream = urlConnection.getInputStream();
 
            BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
 
            StringBuffer sb  = new StringBuffer();
 
            String line = "";
            while( ( line = br.readLine())  != null){
                sb.append(line);
            }
 
            data = sb.toString();
 
            br.close();
 
        }catch(Exception e){
            Log.d("Exception while downloading url", e.toString());
        }finally{
            iStream.close();
            urlConnection.disconnect();
        }
 
        return data;
    }
    
    /** A class, to download Google Places */
    private class PlacesTask extends AsyncTask<String, Integer, String>{
 
        String data = null;
 
        // Invoked by execute() method of this object
        @Override
        protected String doInBackground(String... url) {
            try{
                data = downloadUrl(url[0]);
            }catch(Exception e){
                Log.d("Background Task",e.toString());
            }
            return data;
        }
 
        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(String result){
           ParserTask parserTask = new ParserTask();
 
            // Start parsing the Google places in JSON format
            // Invokes the "doInBackground()" method of the class ParseTask
            parserTask.execute(result);
        }
 
    }
 
    /** A class to parse the Google Places in JSON format */
    private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String,String>>>{
 
        JSONObject jObject;
 
        // Invoked by execute() method of this object
        @Override
        protected List<HashMap<String,String>> doInBackground(String... jsonData) {
 
            List<HashMap<String, String>> places = null;
            PlaceJSONParser placeJsonParser = new PlaceJSONParser();
 
            try{
                jObject = new JSONObject(jsonData[0]);
 
                /** Getting the parsed data as a List construct */
                places = placeJsonParser.parse(jObject);
 
            }catch(Exception e){
                Log.d("Exception",e.toString());
            }
            return places;
        }
 
        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(List<HashMap<String,String>> list){
 
            // Clears all the existing markers
          Location location;
          mGoogleMap.clear();
            
            
            //slatitude = location.getLatitude();
            //mLongitude = location.getLongitude();
           // LatLng latLng2 = new LatLng(mLatitude, mLongitude);
            
           // mGoogleMap.getCameraPosition().target.latitude;
            
            //mGoogleMap.getCameraPosition().target.latLng2;
            for(int i=0;i<list.size();i++){
 
                // Creating a marker
                MarkerOptions markerOptions = new MarkerOptions();
 
                // Getting a place from the places list
                HashMap<String, String> hmPlace = list.get(i);
 
                // Getting latitude of the place
                double lat = Double.parseDouble(hmPlace.get("lat"));
 
                // Getting longitude of the place
                double lng = Double.parseDouble(hmPlace.get("lng"));
 
                // Getting name
                String name = hmPlace.get("place_name");
 
                // Getting vicinity
                String vicinity = hmPlace.get("vicinity");
 
                LatLng latLng = new LatLng(lat, lng);
                // Setting the position for the marker
                markerOptions.position(latLng);
 
                // Setting the title for the marker.
                //This will be displayed on taping the marker
                markerOptions.title(name + " : " + vicinity);
 
                // Placing a marker on the touched position
                mGoogleMap.addMarker(markerOptions);
             
//                CameraUpdate center = CameraUpdateFactory.newLatLng(latLng);
                
            }
            
            HashMap<String, String> hmPlace = list.get(0);
            
            // Getting latitude of the place
            double lat = Double.parseDouble(hmPlace.get("lat"));

            // Getting longitude of the place
            double lng = Double.parseDouble(hmPlace.get("lng"));
            LatLng latLng = new LatLng(lat, lng);
            CameraUpdate cPosition = CameraUpdateFactory.newLatLngZoom(latLng, 10);
            mGoogleMap.moveCamera(cPosition);
        }
    }
    @Override
    public void onLocationChanged(Location location) {
        mLatitude = location.getLatitude();
        mLongitude = location.getLongitude();
        LatLng latLng = new LatLng(mLatitude, mLongitude);
 
        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(12));
    }
 
   @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub
    }
 
    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub
    }
 
    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub
    }

}

Java Source Code List

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