Updated Location Service to use Google Play Location Service

LocationLib/src/com/TwentyCodes/android/debug/LocationLibraryConstants.java

@@ -72,6 +72,8 @@ public final class LocationLibraryConstants {
 
 	public static final String INTENT_EXTRA_LOCATION_CHANGED = LocationManager.KEY_LOCATION_CHANGED;
 
+	public static final String INTENT_EXTRA_LOCATION_ATUO = "RockBarrette.action.LocationAuto";
+
 	/**
 	 * Used to tell the service how accurate of a location you want reported
 	 */
@@ -82,4 +84,15 @@ public final class LocationLibraryConstants {
 	 * no data
 	 */
 	public static final long FAIL_SAFE_UPDATE_INVERVAL = AlarmManager.INTERVAL_FIFTEEN_MINUTES;
+
+	// Milliseconds per second
+	private static final int MILLISECONDS_PER_SECOND = 1000;
+	// Update frequency in seconds
+	private static final int UPDATE_INTERVAL_IN_SECONDS = 30;
+	// Update frequency in milliseconds
+	public static final long UPDATE_INTERVAL = MILLISECONDS_PER_SECOND * UPDATE_INTERVAL_IN_SECONDS;
+	// The fastest update frequency, in seconds
+	private static final int FASTEST_INTERVAL_IN_SECONDS = 30;
+	// A fast frequency ceiling in milliseconds
+	public static final long FASTEST_INTERVAL = MILLISECONDS_PER_SECOND * FASTEST_INTERVAL_IN_SECONDS;
 }

LocationLib/src/com/TwentyCodes/android/location/GeoUtils.java

@@ -133,9 +133,7 @@ public class GeoUtils {
 		 * 
 		 * we are solving this equation for lon2Rad
 		 * 
-		 * lon2Rad =
+		 * lon2Rad = lon1Rad+acos(cos(meters/6371)sec(lat1Rad)sec(lat2Rad)-tan(lat1Rad)tan(lat2Rad))
-		 * lon1Rad+acos(cos(meters/6371)sec(lat1Rad)sec(lat2Rad)-tan(lat1Rad
-		 * )tan(lat2Rad))
 		 * 
 		 * NOTE: sec(x) = 1/cos(x)
 		 * 
@@ -148,10 +146,35 @@ public class GeoUtils {
 		 * device, and the distanceKm() from google and has been proven to be
 		 * damn close
 		 */
-		final double lon2Rad = lon1Rad + Math.acos(Math.cos(distance / 6371) * (1 / Math.cos(lat1Rad)) * (1 / Math.cos(lat1Rad)) - Math.tan(lat1Rad) * Math.tan(lat1Rad));
+		final double lon2Rad = lon1Rad + Math.acos(Math.cos(distance / 6371) * sec(lat1Rad) * sec(lat1Rad) - Math.tan(lat1Rad) * Math.tan(lat1Rad));
 
 		// return a LatLng that is x meters away from the LatLng supplied
-		return new LatLng(point.latitude, (int) (Math.toDegrees(lon2Rad) * 1e6));
+		return new LatLng(point.latitude, Math.toDegrees(lon2Rad));
+	}
+
+	public static LatLng distanceFrom(final LatLng point, final double distance, final float bearing) {
+		final double dist = distance / 6371;
+		final double brng = Math.toRadians(bearing);
+
+		final double lat1 = Math.toRadians(point.latitude);
+		final double lon1 = Math.toRadians(point.longitude);
+
+		final double lat2 = Math.asin(Math.sin(lat1) * Math.cos(dist) + Math.cos(lat1) * Math.sin(dist) * Math.cos(brng));
+
+		final double lon2 = lon1 + Math.atan2(Math.sin(brng) * Math.sin(dist) * Math.cos(lat1), Math.cos(dist) - Math.sin(lat1) * Math.sin(lat2));
+
+//		if (isNaN(lat2) || isNaN(lon2))
+//			return null;
+		return new LatLng(Math.toDegrees(lat2), Math.toDegrees(lon2));
+	}
+
+	/**
+	 * compute secant
+	 * @param theta angle in radians
+	 * @return secant of theta.
+	 */
+	public static double sec ( double theta ){
+		return 1.0 / Math.cos( theta );
 	}
 
 	/**

LocationLib/src/com/TwentyCodes/android/location/LocationService.java

@@ -25,16 +25,17 @@ import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
 import android.location.Location;
-import android.location.LocationListener;
+import android.os.*;
-import android.os.Bundle;
-import android.os.Handler;
-import android.os.IBinder;
-import android.os.PowerManager;
 import android.os.PowerManager.WakeLock;
 import android.util.Log;
-
 import com.TwentyCodes.android.debug.Debug;
 import com.TwentyCodes.android.debug.LocationLibraryConstants;
+import com.google.android.gms.common.ConnectionResult;
+import com.google.android.gms.common.GooglePlayServicesClient;
+import com.google.android.gms.common.GooglePlayServicesUtil;
+import com.google.android.gms.location.LocationClient;
+import com.google.android.gms.location.LocationListener;
+import com.google.android.gms.location.LocationRequest;
 
 /**
  * This service class will be used broadcast the users location either one time,
@@ -42,10 +43,21 @@ import com.TwentyCodes.android.debug.LocationLibraryConstants;
  * 
  * @author ricky barrette
  */
-public class LocationService extends Service implements LocationListener {
+public class LocationService extends Service implements GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener, LocationListener {
 
 	public static final String TAG = "LocationService";
 	private static final int REQUEST_CODE = 7893749;
+	private IBinder mBinder;
+	private LocationClient mLocationClient;
+	private LocationRequest mLocationRequest;
+	// Flag that indicates if a request is underway.
+	private boolean mInProgress;
+	private Boolean servicesAvailable = false;
+	private WakeLock mWakeLock;
+	private Location mLocation;
+	private int mStartId;
+	private int mRequiredAccuracy;
+	private Intent mIntent;
 
 	/**
 	 * a convince method for getting an intent to start the service
@@ -76,14 +88,6 @@ public class LocationService extends Service implements LocationListener {
 		};
 	}
 
-	private WakeLock mWakeLock;
-	private Location mLocation;
-	private int mStartId;
-	private AndroidGPS mLocationManager;
-	private int mRequiredAccuracy;
-
-	private Intent mIntent;
-
 	/*
 	 * this runnable will be qued when the service is created. this will be used
 	 * as a fail safe
@@ -116,20 +120,6 @@ public class LocationService extends Service implements LocationListener {
 		}
 	}
 
-	/**
-	 * (non-Javadoc)
-	 * 
-	 * @see android.app.Service#onBind(android.content.Intent)
-	 * @param arg0
-	 * @return
-	 * @author ricky barrette
-	 */
-	@Override
-	public IBinder onBind(final Intent arg0) {
-		// UNUSED
-		return null;
-	}
-
 	/**
 	 * called when the service is created. this will initialize the location
 	 * manager, and acquire a wakelock (non-Javadoc)
@@ -139,7 +129,6 @@ public class LocationService extends Service implements LocationListener {
 	 */
 	@Override
 	public void onCreate() {
-		mLocationManager = new AndroidGPS(this);
 		final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 		mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
 		mWakeLock.acquire();
@@ -150,6 +139,24 @@ public class LocationService extends Service implements LocationListener {
 		 */
 		new Handler().postDelayed(failSafe, LocationLibraryConstants.MAX_LOCATION_SERVICE_RUN_TIME);
 		super.onCreate();
+
+		mInProgress = false;
+		// Create the LocationRequest object
+		mLocationRequest = LocationRequest.create();
+		// Use high accuracy
+		mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
+		// Set the update interval to 5 seconds
+		mLocationRequest.setInterval(LocationLibraryConstants.UPDATE_INTERVAL);
+		// Set the fastest update interval to 1 second
+		mLocationRequest.setFastestInterval(LocationLibraryConstants.FASTEST_INTERVAL);
+
+		servicesAvailable = servicesConnected();
+
+        /*
+         * Create a new location client, using the enclosing class to
+         * handle callbacks.
+         */
+		mLocationClient = new LocationClient(this, this, this);
 	}
 
 	/**
@@ -162,7 +169,15 @@ public class LocationService extends Service implements LocationListener {
 	@Override
 	public void onDestroy() {
 		broadcastLocation();
-		mLocationManager.disableLocationUpdates();
+
+		// Turn off the request flag
+		mInProgress = false;
+		if(servicesAvailable && mLocationClient != null) {
+			// Destroy the current location client
+			mLocationClient.removeLocationUpdates(this);
+			mLocationClient = null;
+		}
+
 		if (mWakeLock.isHeld())
 			mWakeLock.release();
 	}
@@ -177,18 +192,6 @@ public class LocationService extends Service implements LocationListener {
 			stopSelf(mStartId);
 	}
 
-	@Override
-	public void onProviderDisabled(final String provider) {
-		// TODO Auto-generated method stub
-
-	}
-
-	@Override
-	public void onProviderEnabled(final String provider) {
-		// TODO Auto-generated method stub
-
-	}
-
 	/**
 	 * This method is called when startService is called. only used in 2.x
 	 * android.
@@ -203,13 +206,19 @@ public class LocationService extends Service implements LocationListener {
 
 		parseIntent(intent);
 
-		mLocationManager.enableLocationUpdates(this);
+		super.onStartCommand(intent, flags, startId);
+
+		if(!servicesAvailable || mLocationClient.isConnected() || mInProgress)
 			return START_STICKY;
+
+		setUpLocationClientIfNeeded();
+		if(!mLocationClient.isConnected() || !mLocationClient.isConnecting() && !mInProgress)
+		{
+			mInProgress = true;
+			mLocationClient.connect();
 		}
 
-	@Override
+		return START_STICKY;
-	public void onStatusChanged(final String provider, final int status, final Bundle extras) {
-		// TODO Auto-generated method stub
 	}
 
 	/**
@@ -228,4 +237,86 @@ public class LocationService extends Service implements LocationListener {
 				mRequiredAccuracy = intent.getIntExtra(LocationLibraryConstants.INTENT_EXTRA_REQUIRED_ACCURACY, LocationLibraryConstants.MINIMUM_REQUIRED_ACCURACY);
 		}
 	}
+
+		public class LocalBinder extends Binder {
+			public LocationService getServerInstance() {
+				return LocationService.this;
+			}
+		}
+
+	private boolean servicesConnected() {
+
+		// Check that Google Play services is available
+		int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
+
+		// If Google Play services is available
+		if (ConnectionResult.SUCCESS == resultCode) {
+
+			return true;
+		} else {
+
+			return false;
+		}
+	}
+
+	/*
+     * Create a new location client, using the enclosing class to
+     * handle callbacks.
+     */
+	private void setUpLocationClientIfNeeded()
+	{
+		if(mLocationClient == null)
+			mLocationClient = new LocationClient(this, this, this);
+	}
+
+	@Override
+	public IBinder onBind(Intent intent) {
+		return mBinder;
+	}
+
+	/*
+	 * Called by Location Services when the request to connect the
+	 * client finishes successfully. At this point, you can
+	 * request the current location or start periodic updates
+	 */
+	@Override
+	public void onConnected(Bundle bundle) {
+
+		mLocationClient.requestLocationUpdates(mLocationRequest, this);
+	}
+
+	/*
+	 * Called by Location Services if the connection to the
+	 * location client drops because of an error.
+	 */
+	@Override
+	public void onDisconnected() {
+		// Turn off the request flag
+		mInProgress = false;
+		mLocationClient.removeLocationUpdates(this);
+		// Destroy the current location client
+		mLocationClient = null;
+	}
+
+	/*
+	 * Called by Location Services if the attempt to
+	 * Location Services fails.
+	 */
+	@Override
+	public void onConnectionFailed(ConnectionResult connectionResult) {
+		mInProgress = false;
+
+        /*
+         * Google Play services can resolve some errors it detects.
+         * If the error has a resolution, try sending an Intent to
+         * start a Google Play services activity that can resolve
+         * error.
+         */
+		if (connectionResult.hasResolution()) {
+
+			// If no resolution is available, display an error dialog
+		} else {
+
+		}
+	}
 }