Mobile Security defender------mobile phone anti-theft page play alarm music &GPS positioning

Play Alarm Music

1. Put the music file in the Res/raw file

2. Create a MediaPlayer object
MediaPlayer player = mediaplayer.create (context,r.raw.*);

3. Set the highest sound:
Player.setvolume (1.0f,1.0f);

4. Set the sound for loop playback:
Player.setlooping (TRUE);

Code:

  //报警音乐  MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.alarm);  //音量调成最高  mediaPlayer.setVolume(1.0f,1.0f);  //循环播放  mediaPlayer.setLooping(true);  //开始播放  mediaPlayer.start();

GPS Positioning
1. Positioning method:
Positioning GPS positioning based on network positioning base station

(1) network location WiFi 2g 3g
Get an IP address to determine its approximate location based on the IP address
It's a big error.

(2) Base station positioning
The accuracy of the positioning depends on the number of base stations

(3) GPS positioning
by satellite positioning.
Suitable for use in open spaces

A-gps
Shorten positioning time, reduce power consumption, improve positioning sensitivity
High accuracy of about 15m

The code implementation of the positioning function:

1. Create a class: Gpsservice, inherit from service
2. Registering in the manifest list
3. Operations to get positions in the OnCreate () method

• Create location service
  Locationmanager manager = Getsystemservice (location_service);

• Get the best location provider

  • Set conditions
    Criteria = new criteria ();
    Criteria.setaccuracy (criteria.accuracy_fine);

  • Get the best location provider
    String Provider = Criteria.getbestprovider (criteria,true);

  • Listening position change
    Manager.requestlocationupdates ()
    • First parameter: Positioning mode ("GPs")
    • Second parameter: How often is 60000 (1 minutes) Updated
    · Third parameter: How many meters update the
    • Fourth parameter: interface, listening position
    New locationlistener{
    //callback at position change
    onlocationchanged ()
    {
    String Jingdu = "" +location.getlongitude ();
    String Weidu = "" +location.getlatitude ();
    //Precision
    String accuracy = "" +location.getaccuracy ();
    }

    //callback from on to off when the status changes
    Onstatuschanged ()
    {

    }

    //One location provider available
    Onproviderenabled ()

    //A location provider is not available
    onproviderdisabled ()
    }

  Cancel listener:
  OnDestroy () in:
  Lm.removeupdates ( Listener);
  listener = null;

Permissions: Access_fine_location High precision position
Access_coarse_location Rough Position
Access_mock_location Simulator Location

Mars coordinate system (National security plugin)
Due to the security strategy, GPS positioning results in China will have a certain amount of offset (irregular bias)

Mars Coordinate conversion code: (online Yes, can reduce the offset, improve accuracy)

1.modifyoffset.getinstance (. Class.getresouceadstream (. dat));
2.PointDouble newdouble1 = offset.s2c (new pointdouble (longitude, latitude))
3.longtitude = offset. X
4.latitude = offset. Y

The final code implementation:

Gpsservice.class

 Public  class gpsservice extends Service{    PrivateSharedpreferences sp;PrivateSharedpreferences.editor Editor;PrivateLocationmanager Manager;PrivateMylocalchangedlistener Listener; Public Gpsservice() {    } PublicIBinderOnbind(Intent Intent) {return NewBinder (); } Public void onCreate()    {Super. OnCreate (); SP = Getsharedpreferences ("config", mode_private);        Editor = Sp.edit (); Listener =NewMylocalchangedlistener ();//Create Location ServicesManager = (Locationmanager) getsystemservice (Location_service);//Set conditionsCriteria =NewCriteria (); Criteria.setaccuracy (Criteria.accuracy_fine);//Get the best location providerString providers = Manager.getbestprovider (criteria,true);//Monitor location changesManager.requestlocationupdates (providers,60000, -, listener); } Public void OnDestroy()    {Super. OnDestroy ();        Manager.removeupdates (listener); Listener =NULL; } Public  class Mylocalchangedlistener implements Locationlistener {        callback when//position changed         Public void onlocationchanged(Location location) {//1. Obtaining latitude and longitude and accuracy            DoubleLongitude = Location.getlongitude ();DoubleLatitude = Location.getlatitude ();//2. Convert normal coordinates to Mars coordinatesInputStream is = GPSService.class.getResourceAsStream ("Axisoffset.dat");Try{Modifyoffset Modify = Modifyoffset.getinstance (IS); Pointdouble pointdouble = modify.s2c (NewPointdouble (Longitude,latitude)); String longitudetrue = pointdouble.x+""; String latitudetrue = pointdouble.y+"";//Save latitude and longitudeEditor.putstring ("Location","Longitude:"+longitudetrue+"\ n Latitude: Latitude");            Editor.commit (); }Catch(Exception e)            {E.printstacktrace (); }        }//callback when status is changed         Public void onstatuschanged(String provider,intStatus, Bundle extras) {}//Location provider available callback         Public void onproviderenabled(String Provider) {        }//Callback when the location provider is unavailable         Public void onproviderdisabled(String Provider) {        }    }}

In the Smsreceiver

//Get positioningStringNumber = Sp.getstring ("Safenumber",NULL); Intent intent1 =NewIntent (context, gpsservice.class); Context.startservice (INTENT1);StringLocation = Sp.getstring ("Location",NULL);//Send SMSif(Textutils.isempty (location)) {Smsmanager.getdefault (). Sendtextmessage (number,NULL,"location is getting in, please later ..." ",NULL,NULL);}Else{Smsmanager.getdefault (). Sendtextmessage (number,NULL, Location,NULL,NULL);}

Baidu positioning and Google officials seem to have provided a positioning framework, after the project to learn a bit ~ ~ ~

Copyright notice: Just out of the original content of the pot, I hope you have help ~

Mobile Security defender------mobile phone anti-theft page play alarm music &GPS positioning