From ac7633d8149a28af288ac0b850850cef9b13c151 Mon Sep 17 00:00:00 2001
From: sjtufs <sjtu_fs@outlook.com>
Date: Sun, 25 Aug 2013 15:45:55 +0800
Subject: This is alpha

---
 .../src/com/example/gpstracking/GPSTracker.java    | 200 +++++++++++++++++++++
 1 file changed, 200 insertions(+)
 create mode 100644 misc/client/gps-demo/AndroidGPSTracking/src/com/example/gpstracking/GPSTracker.java

(limited to 'misc/client/gps-demo/AndroidGPSTracking/src/com/example/gpstracking/GPSTracker.java')

diff --git a/misc/client/gps-demo/AndroidGPSTracking/src/com/example/gpstracking/GPSTracker.java b/misc/client/gps-demo/AndroidGPSTracking/src/com/example/gpstracking/GPSTracker.java
new file mode 100644
index 0000000..f1e77ad
--- /dev/null
+++ b/misc/client/gps-demo/AndroidGPSTracking/src/com/example/gpstracking/GPSTracker.java
@@ -0,0 +1,200 @@
+package com.example.gpstracking;
+
+import android.app.AlertDialog;
+import android.app.Service;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.location.Location;
+import android.location.LocationListener;
+import android.location.LocationManager;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.provider.Settings;
+import android.util.Log;
+
+public class GPSTracker extends Service implements LocationListener {
+
+	private final Context mContext;
+
+	// flag for GPS status
+	boolean isGPSEnabled = false;
+
+	// flag for network status
+	boolean isNetworkEnabled = false;
+
+	// flag for GPS status
+	boolean canGetLocation = false;
+
+	Location location; // location
+	double latitude; // latitude
+	double longitude; // longitude
+
+	// The minimum distance to change Updates in meters
+	private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
+
+	// The minimum time between updates in milliseconds
+	private static final long MIN_TIME_BW_UPDATES = 10 * 60 * 1; // 1 minute
+
+	// Declaring a Location Manager
+	protected LocationManager locationManager;
+
+	public GPSTracker(Context context) {
+		this.mContext = context;
+		getLocation();
+	}
+
+	public Location getLocation() {
+		try {
+			locationManager = (LocationManager) mContext
+					.getSystemService(LOCATION_SERVICE);
+
+			// getting GPS status
+			isGPSEnabled = locationManager
+					.isProviderEnabled(LocationManager.GPS_PROVIDER);
+
+			// getting network status
+			isNetworkEnabled = locationManager
+					.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
+
+			if (!isGPSEnabled && !isNetworkEnabled) {
+				// no network provider is enabled
+			} else {
+				this.canGetLocation = true;
+				if (isNetworkEnabled) {
+					locationManager.requestLocationUpdates(
+							LocationManager.NETWORK_PROVIDER,
+							MIN_TIME_BW_UPDATES,
+							MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
+					Log.d("Network", "Network");
+					if (locationManager != null) {
+						location = locationManager
+								.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
+						if (location != null) {
+							latitude = location.getLatitude();
+							longitude = location.getLongitude();
+						}
+					}
+				}
+				// if GPS Enabled get lat/long using GPS Services
+				if (isGPSEnabled) {
+					if (location == null) {
+						locationManager.requestLocationUpdates(
+								LocationManager.GPS_PROVIDER,
+								MIN_TIME_BW_UPDATES,
+								MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
+						Log.d("GPS Enabled", "GPS Enabled");
+						if (locationManager != null) {
+							location = locationManager
+									.getLastKnownLocation(LocationManager.GPS_PROVIDER);
+							if (location != null) {
+								latitude = location.getLatitude();
+								longitude = location.getLongitude();
+							}
+						}
+					}
+				}
+			}
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
+		return location;
+	}
+	
+	/**
+	 * Stop using GPS listener
+	 * Calling this function will stop using GPS in your app
+	 */
+	public void stopUsingGPS(){
+		if(locationManager != null){
+			locationManager.removeUpdates(GPSTracker.this);
+		}		
+	}
+	
+	/**
+	 * Function to get latitude
+	 */
+	public double getLatitude(){
+		if(location != null){
+			latitude = location.getLatitude();
+		}
+		
+		// return latitude
+		return latitude;
+	}
+	
+	/**
+	 * Function to get longitude
+	 */
+	public double getLongitude(){
+		if(location != null){
+			longitude = location.getLongitude();
+		}
+		
+		// return longitude
+		return longitude;
+	}
+	
+	/**
+	 * Function to check GPS/wifi enabled
+	 * @return boolean
+	 */
+	public boolean canGetLocation() {
+		return this.canGetLocation;
+	}
+	
+	/**
+	 * Function to show settings alert dialog
+	 * On pressing Settings button will lauch Settings Options
+	 */
+	public void showSettingsAlert(){
+		AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
+   	 
+        // Setting Dialog Title
+        alertDialog.setTitle("GPS is settings");
+ 
+        // Setting Dialog Message
+        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
+ 
+        // On pressing Settings button
+        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog,int which) {
+            	Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
+            	mContext.startActivity(intent);
+            }
+        });
+ 
+        // on pressing cancel button
+        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int which) {
+            dialog.cancel();
+            }
+        });
+ 
+        // Showing Alert Message
+        alertDialog.show();
+	}
+
+	@Override
+	public void onLocationChanged(Location 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 IBinder onBind(Intent arg0) {
+		return null;
+	}
+}
-- 
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