检测用户是否在位置服务中切换到 NO

Question

如果未启用 GPS 或网络，我有一个重定向到设置的代码。问题是我想在警报对话框检测到 GPS 未启用或检测到用户在位置中选择的选项时以编程方式强制执行定位服务服务，然后重定向回调用活动。另外，我希望每 10 秒检查一次位置，直到特定活动开启。请帮助我

我的 GPS 检查方法

 public void setGPSLocation()
{
    GPSTracker gps = new GPSTracker(FormBuilderActivity.this);
    // check if GPS enabled
    if(gps.canGetLocation()){
        latitude_loc = gps.getLatitude();
        longitude_loc = gps.getLongitude();

        // \n is for new line
        // Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
    }else{
        latitude_loc = 0.00;
        longitude_loc = 0.00;
        // can't get location
        // GPS or Network is not enabled
        // Ask user to enable GPS/network in settings
        gps.showSettingsAlert();

    }
}

GPSTracker.class

public class GPSTracker 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
// 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 settings");
    // Setting Dialog Message
    alertDialog.setMessage("GPS is not enabled. Please go to settings and switch on the location fetching service");
    // On pressing Settings button
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,int which) {

            //turnGPSOn();

            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
        }
    });
    // on pressing cancel button
    // Showing Alert Message
    alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
 // TODO Auto-generated method stub
}
@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 IBinder onBind(Intent intent) {
  // TODO Auto-generated method stub
    return null;
}

}

Answer 1

试试下面的代码：

@Override
public void onProviderDisabled(String provider) {

    Toast.makeText(context, "Turn On GPS!", Toast.LENGTH_SHORT).show();
    Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
    startActivityForResult(intent, TURN_ON_GPS_ACTIVITY);
}

在你的 onActivityResult 中：

case TURN_ON_GPS_ACTIVITY:
            //check gps state
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                //Here : when user comes back from settings without switching on GPS
                // Do as you please, either take them again to settings or show some warning message.

            }

我希望这能达到你的目的。