com.mpower.clientcollection.activities.GeoPointMapActivity.java Source code

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Here is the source code for com.mpower.clientcollection.activities.GeoPointMapActivity.java

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/*
 * Copyright (C) 2011 University of Washington
 *
 * 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 com.mpower.clientcollection.activities;

import java.text.DecimalFormat;
import java.util.List;
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.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.GoogleMap.OnMarkerDragListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import com.mpower.clientcollection.activity.R;

import com.mpower.clientcollection.application.ClientCollection;
import com.mpower.clientcollection.utilities.InfoLogger;
import com.mpower.clientcollection.widgets.GeoPointWidget;

/**
 * Version of the GeoPointMapActivity that uses the new Maps v2 API and Fragments to enable
 * specifying a location via placing a tracker on a map.
 *
 * @author guisalmon@gmail.com
 *
 */
public class GeoPointMapActivity extends FragmentActivity
        implements LocationListener, OnMarkerDragListener, OnMapLongClickListener {

    private static final String LOCATION_COUNT = "locationCount";

    private GoogleMap mMap;
    private MarkerOptions mMarkerOption;
    private Marker mMarker;
    private LatLng mLatLng;

    private TextView mLocationStatus;

    private LocationManager mLocationManager;

    private Location mLocation;
    private Button mAcceptLocation;
    private Button mCancelLocation;
    private Button mReloadLocation;

    private boolean mCaptureLocation = true;
    private boolean mRefreshLocation = true;
    private boolean mIsDragged = false;
    private Button mShowLocation;

    private boolean mGPSOn = false;
    private boolean mNetworkOn = false;

    private double mLocationAccuracy;
    private int mLocationCount = 0;

    private boolean mZoomed = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (savedInstanceState != null) {
            mLocationCount = savedInstanceState.getInt(LOCATION_COUNT);
        }

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.geopoint_layout);

        Intent intent = getIntent();

        mLocationAccuracy = GeoPointWidget.DEFAULT_LOCATION_ACCURACY;
        if (intent != null && intent.getExtras() != null) {
            if (intent.hasExtra(GeoPointWidget.LOCATION)) {
                double[] location = intent.getDoubleArrayExtra(GeoPointWidget.LOCATION);
                mLatLng = new LatLng(location[0], location[1]);
            }
            if (intent.hasExtra(GeoPointWidget.ACCURACY_THRESHOLD)) {
                mLocationAccuracy = intent.getDoubleExtra(GeoPointWidget.ACCURACY_THRESHOLD,
                        GeoPointWidget.DEFAULT_LOCATION_ACCURACY);
            }
            mCaptureLocation = !intent.getBooleanExtra(GeoPointWidget.READ_ONLY, false);
            mRefreshLocation = mCaptureLocation;
        }

        /* Set up the map and the marker */
        mMarkerOption = new MarkerOptions();
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        mMap.setOnMarkerDragListener(this);

        mLocationStatus = (TextView) findViewById(R.id.location_status);

        /*Zoom only if there's a previous location*/
        if (mLatLng != null) {
            mLocationStatus.setVisibility(View.GONE);
            mMarkerOption.position(mLatLng);
            mMarker = mMap.addMarker(mMarkerOption);
            mRefreshLocation = false; // just show this position; don't change it...
            mMarker.setDraggable(mCaptureLocation);
            mZoomed = true;
            mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(mLatLng, 16));
        }

        mCancelLocation = (Button) findViewById(R.id.cancel_location);
        mCancelLocation.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                ClientCollection.getInstance().getActivityLogger().logInstanceAction(this, "cancelLocation",
                        "cancel");
                finish();
            }
        });

        mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        // make sure we have a good location provider before continuing
        List<String> providers = mLocationManager.getProviders(true);
        for (String provider : providers) {
            if (provider.equalsIgnoreCase(LocationManager.GPS_PROVIDER)) {
                mGPSOn = true;
            }
            if (provider.equalsIgnoreCase(LocationManager.NETWORK_PROVIDER)) {
                mNetworkOn = true;
            }
        }
        if (!mGPSOn && !mNetworkOn) {
            Toast.makeText(getBaseContext(), getString(R.string.provider_disabled_error), Toast.LENGTH_SHORT)
                    .show();
            finish();
        }

        if (mGPSOn) {
            Location loc = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            if (loc != null) {
                InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis()
                        + " lastKnownLocation(GPS) lat: " + loc.getLatitude() + " long: " + loc.getLongitude()
                        + " acc: " + loc.getAccuracy());
            } else {
                InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis()
                        + " lastKnownLocation(GPS) null location");
            }
        }

        if (mNetworkOn) {
            Location loc = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            if (loc != null) {
                InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis()
                        + " lastKnownLocation(Network) lat: " + loc.getLatitude() + " long: " + loc.getLongitude()
                        + " acc: " + loc.getAccuracy());
            } else {
                InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis()
                        + " lastKnownLocation(Network) null location");
            }
        }

        mAcceptLocation = (Button) findViewById(R.id.accept_location);
        if (mCaptureLocation) {
            mAcceptLocation.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    ClientCollection.getInstance().getActivityLogger().logInstanceAction(this, "acceptLocation",
                            "OK");
                    returnLocation();
                }
            });
            mMap.setOnMapLongClickListener(this);
        } else {
            mAcceptLocation.setVisibility(View.GONE);
        }

        mReloadLocation = (Button) findViewById(R.id.reload_location);
        if (mCaptureLocation) {
            mReloadLocation.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    mRefreshLocation = true;
                    mReloadLocation.setVisibility(View.GONE);
                    mLocationStatus.setVisibility(View.VISIBLE);
                    if (mGPSOn) {
                        mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
                                GeoPointMapActivity.this);
                    }
                    if (mNetworkOn) {
                        mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
                                GeoPointMapActivity.this);
                    }
                }

            });
            mReloadLocation.setVisibility(!mRefreshLocation ? View.VISIBLE : View.GONE);
        } else {
            mReloadLocation.setVisibility(View.GONE);
        }

        // Focuses on marked location
        mShowLocation = ((Button) findViewById(R.id.show_location));
        mShowLocation.setVisibility(View.VISIBLE);
        mShowLocation.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                ClientCollection.getInstance().getActivityLogger().logInstanceAction(this, "showLocation",
                        "onClick");
                mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(mLatLng, 16));
            }
        });
        mShowLocation.setClickable(mMarker != null);

    }

    private void stopGeolocating() {
        mRefreshLocation = false;
        mReloadLocation.setVisibility(View.VISIBLE);
        mLocationManager.removeUpdates(this);
        mMarker.setDraggable(true);
        mLocationStatus.setVisibility(View.GONE);
    }

    @Override
    protected void onStart() {
        super.onStart();
        ClientCollection.getInstance().getActivityLogger().logOnStart(this);
    }

    @Override
    protected void onStop() {
        ClientCollection.getInstance().getActivityLogger().logOnStop(this);
        super.onStop();
    }

    private void returnLocation() {
        if (mIsDragged) {
            Log.i(getClass().getName(), "IsDragged !!!");
            Intent i = new Intent();
            i.putExtra(FormEntryActivity.LOCATION_RESULT,
                    mLatLng.latitude + " " + mLatLng.longitude + " " + 0 + " " + 0);
            setResult(RESULT_OK, i);
        } else if (mLocation != null) {
            Log.i(getClass().getName(), "IsNotDragged !!!");
            Intent i = new Intent();
            i.putExtra(FormEntryActivity.LOCATION_RESULT, mLocation.getLatitude() + " " + mLocation.getLongitude()
                    + " " + mLocation.getAltitude() + " " + mLocation.getAccuracy());
            setResult(RESULT_OK, i);
        }
        finish();
    }

    private String truncateFloat(float f) {
        return new DecimalFormat("#.##").format(f);
    }

    @Override
    protected void onPause() {
        super.onPause();
        mLocationManager.removeUpdates(this);
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mRefreshLocation) {
            mLocationStatus.setVisibility(View.VISIBLE);
            if (mGPSOn) {
                mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
            }
            if (mNetworkOn) {
                mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
            }
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        if (mRefreshLocation) {
            mLocation = location;
            if (mLocation != null) {
                // Bug report: cached GeoPoint is being returned as the first value.
                // Wait for the 2nd value to be returned, which is hopefully not cached?
                ++mLocationCount;
                InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " onLocationChanged("
                        + mLocationCount + ") lat: " + mLocation.getLatitude() + " long: "
                        + mLocation.getLongitude() + " acc: " + mLocation.getAccuracy());

                if (mLocationCount > 1) {
                    mLocationStatus.setText(getString(R.string.location_provider_accuracy, mLocation.getProvider(),
                            truncateFloat(mLocation.getAccuracy())));
                    mLatLng = new LatLng(mLocation.getLatitude(), mLocation.getLongitude());
                    if (!mZoomed) {
                        mZoomed = true;
                        mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(mLatLng, 16));
                    } else {
                        mMap.animateCamera(CameraUpdateFactory.newLatLng(mLatLng));
                    }

                    // create a marker on the map or move the existing marker to the
                    // new location
                    if (mMarker == null) {
                        mMarkerOption.position(mLatLng);
                        mMarker = mMap.addMarker(mMarkerOption);
                        mShowLocation.setClickable(true);
                    } else {
                        mMarker.setPosition(mLatLng);
                    }

                    //If location is accurate enough, stop updating position and make the marker draggable
                    if (mLocation.getAccuracy() <= mLocationAccuracy) {
                        stopGeolocating();
                    }

                }

            } else {
                InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " onLocationChanged("
                        + mLocationCount + ") null location");
            }
        }
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

    @Override
    public void onMarkerDrag(Marker arg0) {

    }

    @Override
    public void onMarkerDragEnd(Marker marker) {
        mLatLng = marker.getPosition();
        mAcceptLocation.setClickable(true);
        mIsDragged = true;
        mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(mLatLng, mMap.getCameraPosition().zoom));
    }

    @Override
    public void onMarkerDragStart(Marker arg0) {
        stopGeolocating();
    }

    @Override
    public void onMapLongClick(LatLng latLng) {
        if (mMarker == null) {
            mMarkerOption.position(latLng);
            mMarker = mMap.addMarker(mMarkerOption);
            mShowLocation.setClickable(true);
        } else {
            mMarker.setPosition(latLng);
        }
        mLatLng = latLng;
        mIsDragged = true;
        stopGeolocating();
        mMarker.setDraggable(true);
    }
}