Question

我为位置管理器构建了应用程序。我有一种方法可以给我分配经度。

这是我的课程和活动。

GPStracker.java

public class GPSTracker extends Service implements LocationListener {

private final Context mContext;
private final Handler _handler = new Handler();
private static int DATA_INTERVAL = 1 * 60 * 1000;

// 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

// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

// Declaring a Location Manager
protected LocationManager locationManager;

public GPSTracker(Context context) {
    this.mContext = context;
    getLocation();
}

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;
            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;
}

/**
 * Stop using GPS listener
 * Calling this function will stop using GPS in your app
 * */
public void stopUsingGPS(){
    if(locationManager != null){
        locationManager.removeUpdates(GPSTracker.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;
}

/**
 * Function to show settings alert dialog
 * On pressing Settings button will lauch Settings Options
 * */
public void showSettingsAlert(){
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

    // On pressing Settings button
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,int which) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });

    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
        dialog.cancel();
        }
    });

    // Showing Alert Message
    alertDialog.show();
}

@Override
public void onLocationChanged(Location location) {



}
public void notifyUser() {
    NotificationManager notificationManager = (NotificationManager)this.getSystemService(Context.NOTIFICATION_SERVICE);

    Intent intent = new Intent(GPSTracker.this, AndroidGPSTrackingActivity.class);

    //use the flag FLAG_UPDATE_CURRENT to override any notification already there
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    Notification notification = new Notification(R.drawable.ic_launcher, "Some Text", System.currentTimeMillis());
    notification.flags = Notification.FLAG_AUTO_CANCEL | Notification.DEFAULT_LIGHTS | Notification.DEFAULT_SOUND;

    notification.setLatestEventInfo(this, "", "", contentIntent);
    //10 is a random number I chose to act as the id for this notification
    notificationManager.notify(10, notification);
}


@Override
public void onProviderDisabled(String provider) {
}

@Override
public void onProviderEnabled(String provider) {
}

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

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

}

AndroidGPSTrackingActivity.java

public class AndroidGPSTrackingActivity extends Activity {

Button btnShowLocation;

Geocoder geocoder;
List<Address> addresses;
private final Handler _handler = new Handler();
private static int DATA_INTERVAL = 1 * 60 * 1000;
// GPSTracker class
GPSTracker gps;
double longitude;
double latitude;
String address,city,state,country,postalCode,knownName,city2;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    geocoder = new Geocoder(this, Locale.getDefault());

    location();


    btnShowLocation = (Button) findViewById(R.id.btnShowLocation);

    // show location button click event
    btnShowLocation.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {        
            // create class object

            location();
        }
    });
}


public void location(){

    gps = new GPSTracker(AndroidGPSTrackingActivity.this);

    // check if GPS enabled
    if(gps.canGetLocation()){

        latitude = gps.getLatitude();
        longitude = gps.getLongitude();
        try {
            addresses = geocoder.getFromLocation(latitude, longitude, 1);
            Log.d("adddd", String.valueOf(addresses));
            address = addresses.get(0).getAddressLine(0);
            city = addresses.get(0).getAddressLine(1);
            state = addresses.get(0).getAddressLine(2);


        } catch (IOException e) {
            e.printStackTrace();
        }
        // \n is for new line
        Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude + address + "\n"
                +city +" "+ state
                , Toast.LENGTH_LONG).show();
        _handler.postDelayed(getData, DATA_INTERVAL);
    }else{
        // can't get location
        // GPS or Network is not enabled
        // Ask user to enable GPS/network in settings
        gps.showSettingsAlert();
    }


}

public void notifyUser() {
    NotificationManager notificationManager = (NotificationManager)this.getSystemService(Context.NOTIFICATION_SERVICE);

    Intent intent = new Intent(AndroidGPSTrackingActivity.this, AndroidGPSTrackingActivity.class);

    //use the flag FLAG_UPDATE_CURRENT to override any notification already there
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    Notification notification = new Notification(R.drawable.ic_launcher, "Some Text", System.currentTimeMillis());
    notification.flags = Notification.FLAG_AUTO_CANCEL | Notification.DEFAULT_LIGHTS | Notification.DEFAULT_SOUND;

    notification.setLatestEventInfo(this, city, state, contentIntent);
    //10 is a random number I chose to act as the id for this notification
    notificationManager.notify(10, notification);
}


private final Runnable getData = new Runnable()
{
    @Override
    public void run()
    {

        location();
        notifyUser();
    }
};



}

它给了我一个来自妓女和妓女的位置。

但是当我从最近的应用程序终止应用程序时，它确实无法正常工作。即使我终止应用程序，如何在后台继续此（location（））方法。

请帮帮我。提前致谢

Answer 1

您可以构建远程服务以获取位置信息，远程服务不属于您的应用程序，即使您的应用程序被终止也不会终止。您可以绑定远程服务以获取位置信息。

在后台android运行应用程序

1 个答案: