Android Open Source - ChicagoWaterWalk-Android Map Fragment

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Back to project page ChicagoWaterWalk-Android.

License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2014 The Illinois-Indiana Sea Grant
 */*from   w  w w  .j  a  v  a  2 s .  c  om*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.iisgcp.waterwalk.fragment;

import org.iisgcp.waterwalk.R;
import org.iisgcp.waterwalk.utils.Constants;

import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks;
import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener;
import com.google.android.gms.location.LocationClient;
import com.google.android.gms.location.LocationListener;
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.GoogleMap.OnMyLocationButtonClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MapFragment extends SupportMapFragment
    implements
        ConnectionCallbacks,
        OnConnectionFailedListener,
        LocationListener,
    OnMyLocationButtonClickListener {

  private GoogleMap mMap;
    private LocationClient mLocationClient;

    private static int ZOOM = 13;
  private static double DEFAULT_LATITUDE = -1;
  private static double DEFAULT_LONGITUDE = -1;
  
    /**
     * Fragment initialization.  We way we want to be retained and
     * start our thread.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        setHasOptionsMenu(true);
    }
  
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

      if (savedInstanceState == null) {
        // First incarnation of this activity.
          setRetainInstance(true);
      } else {
          // Reincarnated activity. The obtained map is the same map instance in the previous
              // activity life cycle. There is no need to reinitialize it.
          mMap = getMap();
      }
      setUpMapIfNeeded();
  }
  
    @Override
    public void onResume() {
        super.onResume();
        setUpMapIfNeeded();
        setUpLocationClientIfNeeded();
        mLocationClient.connect();
    }
  
    @Override
    public void onPause() {
        super.onPause();
        if (mLocationClient != null) {
            mLocationClient.disconnect();
        }
    }
    
  @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.routes_map_fragment_menu, menu);
        super.onCreateOptionsMenu(menu, inflater);
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
          case R.id.menu_route_locations:
            goToDefaultLocation();
            return true;
          default:
            return super.onOptionsItemSelected(item);
        }
    }
  
  private void goToDefaultLocation() {
    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(DEFAULT_LATITUDE,
        DEFAULT_LONGITUDE), ZOOM);
      mMap.animateCamera(cameraUpdate);
  }

  private void addDefaultMarkers() {
          String title = getActivity().getIntent().getStringExtra(Constants.INTENT_TITLE);
          getActivity().setTitle(title);
          DEFAULT_LATITUDE = getActivity().getIntent().getFloatExtra(Constants.INTENT_LATITUDE, -1);
          DEFAULT_LONGITUDE = getActivity().getIntent().getFloatExtra(Constants.INTENT_LONGITUDE, -1);
          
          mMap.addMarker(new MarkerOptions()
          .position(new LatLng(DEFAULT_LATITUDE, DEFAULT_LONGITUDE))
          .title(title));
  }
  
    private void setUpMapIfNeeded() {
        if (mMap == null) {
            mMap = getMap();
            if (mMap != null) {
                setUpMap();
            }
        }
    }
  
    private void setUpMap() {
      mMap.setMyLocationEnabled(true);
        mMap.setOnMyLocationButtonClickListener(this);
      
      addDefaultMarkers();
      goToDefaultLocation();
    }
    
    private void setUpLocationClientIfNeeded() {
        if (mLocationClient == null) {
            mLocationClient = new LocationClient(
                getActivity().getApplicationContext(),
                    this,  // ConnectionCallbacks
                    this); // OnConnectionFailedListener
        }
    }

    /**
     * Button to get current Location. This demonstrates how to get the current Location as required
     * without needing to register a LocationListener.
     */
    private boolean showMyLocation() {
        if (mLocationClient != null && mLocationClient.isConnected()) {
            Location location = mLocationClient.getLastLocation();
            
            if (location == null) {
              final LocationManager manager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);

              if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                return true;
              } else {
                  Toast.makeText(getActivity().getApplicationContext(), R.string.gps_error, Toast.LENGTH_LONG).show();
                  return true;
              }
            }
        }
        
        return false;
    }

  @Override
  public void onConnected(Bundle connectionHint) {
    // TODO Auto-generated method stub
    
  }

  @Override
  public void onDisconnected() {
    // TODO Auto-generated method stub
    
  }

  @Override
  public void onConnectionFailed(ConnectionResult result) {
    // TODO Auto-generated method stub
    
  }
  
  @Override
  public void onLocationChanged(Location location) {
    // TODO Auto-generated method stub
    
  }
  
  @Override
  public boolean onMyLocationButtonClick() {
        // Return false so that we don't consume the event and the default behavior still occurs
        // (the camera animates to the user's current position).
    return showMyLocation();
  }
}

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