运行GPS作为后台服务并将坐标发送到Web服务器(PHP)
我知道有很多关于这个问题的问题,我已经经历了几天,但找不到一个合理的答案。我是Android和php的新手,所以我不知道事情是如何完成的。
所以基本上首先我想知道如何在后台运行gps作为服务,就像当应用程序安装时,它会启动并定期将坐标发送到Web服务器?
我知道有很多关于这个问题的问题,我已经经历了几天,但找不到一个合理的答案。我是Android和php的新手,所以我不知道事情是如何完成的。
所以基本上首先我想知道如何在后台运行gps作为服务,就像当应用程序安装时,它会启动并定期将坐标发送到Web服务器?
只需创建一个始终在后台运行的服务。
例如:-
安卓位置服务
public class AndroidLocationServices extends Service {
WakeLock wakeLock;
private LocationManager locationManager;
public AndroidLocationServices() {
// TODO Auto-generated constructor stub
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
PowerManager pm = (PowerManager) getSystemService(this.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "DoNotSleep");
// Toast.makeText(getApplicationContext(), "Service Created",
// Toast.LENGTH_SHORT).show();
Log.e("Google", "Service Created");
}
@Override
@Deprecated
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
Log.e("Google", "Service Started");
locationManager = (LocationManager) getApplicationContext()
.getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
5000, 5, listener);
}
private LocationListener listener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
Log.e("Google", "Location Changed");
if (location == null)
return;
if (isConnectingToInternet(getApplicationContext())) {
JSONArray jsonArray = new JSONArray();
JSONObject jsonObject = new JSONObject();
try {
Log.e("latitude", location.getLatitude() + "");
Log.e("longitude", location.getLongitude() + "");
jsonObject.put("latitude", location.getLatitude());
jsonObject.put("longitude", location.getLongitude());
jsonArray.put(jsonObject);
Log.e("request", jsonArray.toString());
new LocationWebService().execute(new String[] {
Constants.TRACK_URL, jsonArray.toString() });
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
};
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
wakeLock.release();
}
public static boolean isConnectingToInternet(Context _context) {
ConnectivityManager connectivity = (ConnectivityManager) _context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
return false;
}
}
位置网站服务
public class LocationWebService extends AsyncTask<String, String, Boolean> {
public LocationWebService() {
// TODO Auto-generated constructor stub
}
@Override
protected Boolean doInBackground(String... arg0) {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("location", arg0[1]));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(arg0[0]);
HttpParams httpParameters = new BasicHttpParams();
httpclient = new DefaultHttpClient(httpParameters);
try {
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response;
response = httpclient.execute(httppost);
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
Log.e("Google", "Server Responded OK");
} else {
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
你可以在这个github项目androidbackgroundgps中找到一个带有Android App和相应WebFiles的示例项目。