试图制作Android服务

时间:2014-06-03 09:55:08

标签: php android mysql android-service

我正在尝试制作Android服务,该服务应该在设备启动时启动。它应该每隔5分钟发送位置数据到一个mySQL数据库,通过POST到php网络服务。

它应该发送以下数据:

regID = same regId it used to register to GCM
name = a user name
latitude = the current latitude
longitude = the current longitude

我以前从未做过服务,所以我对正确的做法很困惑。

如果你能引导我走向正确的方向,我将不胜感激。

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;
    }

}

1 个答案:

答案 0 :(得分:1)

您可以通过注册广播接收器并定义 RECEIVE_BOOT_COMPLETED 权限来实现此目的。

当用户安装应用程序时,操作系统将查看清单并注册自动启动。无论何时启动设备,操作系统都会调用您的onReceive(),以便您可以按如下方式启动服务:

在你的清单中:

<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>

定义AutoStartGeo类:

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事件之后该应用程序无法使用。您必须通过以下方式通知用户或强制您的应用程序通过以下内容安装:android:installLocation =&#34; internalOnly&#34;

此外,在Android 3.0及更高版本上note that,用户需要至少启动一次应用,然后应用才能收到android.intent.action.BOOT_COMPLETED事件。