我正在尝试制作一个Android服务，它应该在设备启动时启动。它应该每5分钟发送位置数据到mySQL数据库，通过POST到php web服务。
应该发送以下数据:
regID = same regId it used to register to GCM
name = a user name
latitude = the current latitude
longitude = the current longitude
我以前从来没有做过服务，所以我很困惑应该怎么做。
如果你能指引我正确的方向，我会很感激的。
这是我到目前为止所做的:
package servicio;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import android.app.Service;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import com.google.android.gcm.GCMRegistrar;
public class GeoService extends Service {
LocationManager manejador;
String proveedor;
Location localizacion;
LocationListener locListener;
String latitud, longitud;
final String regId = GCMRegistrar
.getRegistrationId(getApplicationContext());
// double latitud, longitud;
@Override
public void onCreate() {
manejador = (LocationManager) getSystemService(LOCATION_SERVICE);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Criteria req = new Criteria();
req.setAccuracy(Criteria.ACCURACY_FINE);
// Lista de proveedores por criterio
proveedor = manejador.getBestProvider(req, false);
localizacion = manejador.getLastKnownLocation(proveedor);
// location listener
locListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
latitud = String.valueOf(location.getLatitude());
longitud = String.valueOf(location.getLongitude());
Thread sendGpsPositionToDB = new Thread(new Runnable() {
@Override
public void run() {
String server = "http://www.grupobcn.es/aquacleanmessenger/";
String serverUrl = server + "addposicion.php";
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("iddevice", regId));
params.add(new BasicNameValuePair("latitud", latitud));
params.add(new BasicNameValuePair("longitud", longitud));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(serverUrl);
try {
httppost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = httpclient
.execute(httppost);
} catch (IOException e) {
}
}
});
sendGpsPositionToDB.start();
}
@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
}
};
manejador.requestLocationUpdates(LocationManager.GPS_PROVIDER, 300000,
0, locListener);
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public IBinder onBind(Intent intencion) {
return null;
}
}
可以通过注册广播接收器并定义RECEIVE_BOOT_COMPLETED权限来实现。
当用户安装应用程序时，操作系统将查看清单并注册为自动启动。任何时候设备启动，操作系统将调用你的onReceive()，这样你就可以启动你的服务，如下所示:
在你的manifest中:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<service android:name=".GeoService" />
<receiver android:name="servicio.AutoStartGeo">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
public class AutoStartGeo extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction() != null){
Intent startServiceIntent = new Intent(context, GeoService.class);
context.startService(startServiceIntent);
}
}
}
如果应用程序安装在SD卡上，这不会起作用，因为在android.intent.action.BOOT_COMPLETED事件之后，应用程序将不可用。你必须通知用户这一点，或者通过:android:installLocation="internalOnly"
强制你的应用程序在内部安装。还需要注意的是，在Android 3.0及更高版本上，用户需要在应用程序可以接收Android .intent.action. boot_completed事件之前至少启动一次应用程序。