Cancelling getCurrentLocationSync()

[cubiq1]

Hi,

I know it's possible to add a timeout value to the above method but it is possible to cancel the method using code?

The reason I ask is because I'd like to add a "Cancel" button to my "Getting Location..." Dialog.

Many thanks

[Diamond]

How are you getting the location? are you using locationListenerr and did you block the process with InfiniteProgress?

 

If you post what you've tried, you will get help fast.

Here is another way to read location

public static Double Lat = 0.0;

public static Double Long = 0.0;

public void GetMyLocation() {

        final LocationManager lm = LocationManager.getLocationManager();

        InfiniteProgress ip = new InfiniteProgress();

        final Dialog ipDlg = ip.showInifiniteBlocking();

        Command back = new Command("Back") {

            @Override

            public void actionPerformed(ActionEvent ev) {

                ipDlg.dispose();

               //Here I get the device last known location when user press back

                Location loc = lm.getLastKnownLocation();

                Lat = loc.getLatitude();

                Long = loc.getLongitude() ;

            }

        };

        ipDlg.setBackCommand(back);

        class MyLocationListener implements LocationListener, Runnable {

            boolean locationReady;

           

            public void locationUpdated(Location loc) {

                locationReady = true;

                Lat = loc.getLatitude();

                Long = loc.getLongitude();

            }

            public void providerStateChanged(int newState) {

                // check for unavailable errors etc.

                status = newState;

                locationReady = true;

            }

            public void run() {

                while (!locationReady) {

                    try {

                        //set to end process after 20 seconds if current location is not found and use device last known location

                        Thread.sleep(20000);

                        ipDlg.dispose();

                        Location loc = lm.getLastKnownLocation();

                        Lat = loc.getLatitude();

                        Long = loc.getLongitude();

                    } catch (InterruptedException err) {

                    }

                }

            }

        }

        MyLocationListener m = new MyLocationListener();

        lm.setLocationListener(m);

        Display.getInstance().invokeAndBlock(m);

        

        ipDlg.dispose();

        lm.setLocationListener(null);

        

        Log.p("Lat: " + Lat);

        Log.p("Long: " + Long);

    } 

[cubiq1]

Thanks for the code.

I only need to get the location once so I'm use the following:

Location position = LocationManager.getLocationManager().getCurrentLocationSync(30000); // 30 second timeout

However, I'd like the user to be able to cancel the operation when it takes too long to complete.

[Diamond Mubaarak]

Try this

Location position = LocationManager.getLocationManager().getCurrentLocationSync(30000); // 30 second timeout

        Command back = new Command("Back") {

            @Override

            public void actionPerformed(ActionEvent ev) {

                Thread.currentThread().interrupt();

            }

        };

//depends on if you are getting locationon form show or by pressing a button, use one of this    

    c.getComponentForm().setBackCommand(back);

or 

f.setBackCommand(back);

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[Shai Almog]

That won't work. You would be "interrupting" the EDT.
To cancel just set the location listener to null which will stop the listening process.

[cubiq1]

Thanks. This worked perfectly:

LocationManager.getLocationManager().setLocationListener(null);

Cheers

[cubiq1]

Hi, to add to my previous post. It seems as though even after setting the location listener to null, the code still pauses at the line:

        // Timeout after 30s
        Location position = LocationManager.getLocationManager().getCurrentLocationSync(30000);

for the duration that the timeout was set for.

Is there a way to fix this?

[Shai Almog]

Hi,
not with that implementation.
You can implement your own location sync call to do that.

[cubiq1]

Hi,

So there's no way to cancel getCurrentLocationSync() other than setting a timeout duration?

Thanks

[Shai Almog]

Hi,
no.

[cubiq1]

Hi,

Would it be possible for you to add a method which allows users to cancel getCurrentLocationSync()? I would imagine many will find it useful.

Thanks

[Shai Almog]

Hi,
we probably won't. We have a lot on our plate right now and this just probably won't happen.