Android 运行 Gps 作为后台服务并将坐标发送到 Web 服务器 (PHP)
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Run Gps as background service and send coordinates to web server (PHP)
提问by user3307196
I know there are many questions that have been asked regarding this and i have been going through all that from couple of days but could'nt find a reasonable answer. i am newbie to android and php so i have no idea how things get done.
我知道有很多关于这个的问题，我已经从几天开始经历了所有这些，但找不到合理的答案。我是 android 和 php 的新手，所以我不知道事情是如何完成的。
so basically first i want to know how to run gps as a service in background like when the application is installed it starts and periodically send the coordinates to web server?
所以基本上首先我想知道如何在后台运行 gps 作为服务，就像安装应用程序时一样，它会启动并定期将坐标发送到网络服务器？
回答by Atish Agrawal
Just create a service that runs in the background all the time.
只需创建一个始终在后台运行的服务。
For Example:-
例如：-
AndroidLocationServices
安卓定位服务
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;
}
}
LocationWebService
位置网络服务
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;
}
}
You can find a sample project with Android App and corresponding WebFiles within this github project androidbackgroundgps
您可以在此 github 项目androidbackgroundgps 中找到带有 Android App 和相应 WebFiles 的示例项目
