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在android中使用GPS

android gps

在android中使用GPS,android,gps,android-service,android-handler,Android,Gps,Android Service,Android Handler,我的问题并不新鲜，但Stackoverflow中的所有答案对我都没有帮助 情境：我有一个与闹钟一起工作的服务。它每1分钟重复一次，并为我运行一个服务。在该服务中，我需要将GPS数据发送到web服务器 代码如下： import android.app.Service; import android.content.Intent; import android.location.Location; import android.os.AsyncTask; import android.os.IBin

我的问题并不新鲜，但Stackoverflow中的所有答案对我都没有帮助

情境：我有一个与闹钟一起工作的服务。它每1分钟重复一次，并为我运行一个服务。在该服务中，我需要将GPS数据发送到web服务器

代码如下：

import android.app.Service;
import android.content.Intent;
import android.location.Location;
import android.os.AsyncTask;
import android.os.IBinder;
import bliksund.taxitracking.tools.Cachepref;
import bliksund.taxitracking.tools.PostData;


public class SendData extends Service {
Cachepref cachepref;
GET_GPS gps;

@Override
public void onCreate() {
    super.onCreate();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    cachepref = new Cachepref(this);
    gps = new GET_GPS(this);
    new getloc().execute();
    return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

private class getloc extends AsyncTask<Void, Void, Void> {
    String username;
    Double lt;
    Double lg;
    Location location;
    @Override
    protected Void doInBackground(Void... params) {
        username = cachepref.getUsername();
         location = gps.getLocation();
         lt = location.getLatitude();
        lg = location.getLongitude();
        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {


        PostData postData = new PostData(username, 1, lt, lg);
        super.onPostExecute(aVoid);
    }
}
}

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;


public class GET_GPS extends Service implements LocationListener {

private final Context mContext;

// flag for GPS status
boolean isGPSEnabled = false;

// flag for network status
boolean isNetworkEnabled = false;

// flag for GPS status
boolean canGetLocation = false;

Location location; // location
double latitude; // latitude
double longitude; // longitude

private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
protected LocationManager locationManager;
public GET_GPS(Context mContext) {
    this.mContext = mContext;
}
public Location getLocation() {
    try {
        locationManager = (LocationManager) mContext
                .getSystemService(LOCATION_SERVICE);

        // getting GPS status
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (!isGPSEnabled && !isNetworkEnabled) {
            // no network provider is enabled
        } else {
            this.canGetLocation = true;
            // First get location from Network Provider
            if (isNetworkEnabled) {
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                Log.d("Network", "Network");
                if (locationManager != null) {
                    location = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) {
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    }
                }
            }
            // if GPS Enabled get lat/long using GPS Services
            if (isGPSEnabled) {
                if (location == null) {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }
        }

    } catch (Exception e) {
        e.printStackTrace();
    }

    return location;
}
public void stopUsingGPS(){
    if(locationManager != null){
        locationManager.removeUpdates(GET_GPS.this);
    }
}
/**
 * Function to get latitude
 * */
public double getLatitude(){
    if(location != null){
        latitude = location.getLatitude();
    }

    // return latitude
    return latitude;
}

/**
 * Function to get longitude
 * */
public double getLongitude(){
    if(location != null){
        longitude = location.getLongitude();
    }

    // return longitude
    return longitude;
}

/**
 * Function to check GPS/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}


@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}

@Override
public void onLocationChanged(Location location) {

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}
}
我用AsynTask解决了这个问题，但它仍然存在

GET_GPS代码如下所示：

import android.app.Service;
import android.content.Intent;
import android.location.Location;
import android.os.AsyncTask;
import android.os.IBinder;
import bliksund.taxitracking.tools.Cachepref;
import bliksund.taxitracking.tools.PostData;


public class SendData extends Service {
Cachepref cachepref;
GET_GPS gps;

@Override
public void onCreate() {
    super.onCreate();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    cachepref = new Cachepref(this);
    gps = new GET_GPS(this);
    new getloc().execute();
    return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

private class getloc extends AsyncTask<Void, Void, Void> {
    String username;
    Double lt;
    Double lg;
    Location location;
    @Override
    protected Void doInBackground(Void... params) {
        username = cachepref.getUsername();
         location = gps.getLocation();
         lt = location.getLatitude();
        lg = location.getLongitude();
        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {


        PostData postData = new PostData(username, 1, lt, lg);
        super.onPostExecute(aVoid);
    }
}
}

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;


public class GET_GPS extends Service implements LocationListener {

private final Context mContext;

// flag for GPS status
boolean isGPSEnabled = false;

// flag for network status
boolean isNetworkEnabled = false;

// flag for GPS status
boolean canGetLocation = false;

Location location; // location
double latitude; // latitude
double longitude; // longitude

private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
protected LocationManager locationManager;
public GET_GPS(Context mContext) {
    this.mContext = mContext;
}
public Location getLocation() {
    try {
        locationManager = (LocationManager) mContext
                .getSystemService(LOCATION_SERVICE);

        // getting GPS status
        isGPSEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);

        // getting network status
        isNetworkEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (!isGPSEnabled && !isNetworkEnabled) {
            // no network provider is enabled
        } else {
            this.canGetLocation = true;
            // First get location from Network Provider
            if (isNetworkEnabled) {
                locationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER,
                        MIN_TIME_BW_UPDATES,
                        MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                Log.d("Network", "Network");
                if (locationManager != null) {
                    location = locationManager
                            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                    if (location != null) {
                        latitude = location.getLatitude();
                        longitude = location.getLongitude();
                    }
                }
            }
            // if GPS Enabled get lat/long using GPS Services
            if (isGPSEnabled) {
                if (location == null) {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("GPS Enabled", "GPS Enabled");
                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
            }
        }

    } catch (Exception e) {
        e.printStackTrace();
    }

    return location;
}
public void stopUsingGPS(){
    if(locationManager != null){
        locationManager.removeUpdates(GET_GPS.this);
    }
}
/**
 * Function to get latitude
 * */
public double getLatitude(){
    if(location != null){
        latitude = location.getLatitude();
    }

    // return latitude
    return latitude;
}

/**
 * Function to get longitude
 * */
public double getLongitude(){
    if(location != null){
        longitude = location.getLongitude();
    }

    // return longitude
    return longitude;
}

/**
 * Function to check GPS/wifi enabled
 * @return boolean
 * */
public boolean canGetLocation() {
    return this.canGetLocation;
}


@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}

@Override
public void onLocationChanged(Location location) {

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}
}
在ρцρѕρєK的帮助下。他说要将这些代码移动到PostExecute，当它运行时，PostData出现了问题。我用下面的方法解决了这个问题。我希望它能帮助别人

private class getloc extends AsyncTask<Void, Void, Void> {
    String username;
    Double lt;
    Double lg;
    Location location;
    @Override
    protected Void doInBackground(Void... params) {

        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        username = cachepref.getUsername();
        location = gps.getLocation();
        lt = location.getLatitude();
        lg = location.getLongitude();
        new Thread(new Runnable() {
            @Override
            public void run() {
                PostData postData = new PostData(username, 1, lt, lg);
            }
        }).start();

        super.onPostExecute(aVoid);
    }
}

私有类getloc扩展异步任务{
字符串用户名；
双lt；
双lg；
位置；
@凌驾
受保护的Void doInBackground（Void…参数）{
返回null；
}
@凌驾
受保护的void onPostExecute（void避免）{
username=cachepref.getUsername（）；
location=gps.getLocation（）；
lt=location.getLatitude（）；
lg=location.getLongitude（）；
新线程（newrunnable（））{
@凌驾
公开募捐{
PostData PostData=新的PostData（用户名，1，lt，lg）；
}
}).start（）；
super.onPostExecute（避免）；
}
}
在哪一行中，get
无法在未调用Looper.prepare（）的线程内创建处理程序。
错误？请在此行中共享
GET_GPS
class code location=GPS.getLocation（）@ρцσѕρєK我认为这是因为LocationListener，但我不知道如何解决它是的，它解决了问题，但PostData现在犯了这个错误：android.os.NetworkOnMainThreadException