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POUsing a Mock Location in Navigation App
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copied!<p>I'm trying to develop an application that will simulate a route through Google's Navigation application. I found some excellent examples of how to implement a mock location provider in some other posts on this website ( <a href="https://stackoverflow.com/questions/2531317/android-mock-location-on-device">Android mock location on device?</a> ).<br> With a simple modification to the source code <a href="http://www.cowlumbus.nl/forum/MockGpsProvider.zip" rel="nofollow noreferrer">http://www.cowlumbus.nl/forum/MockGpsProvider.zip</a>, my mock location shows up in Google's Maps application. (The only change is the mock provider name to LocationManager.GPS_PROVIDER).<br> My problem is that when I open the Navigation app, it says "Searching for GPS signal." I still see my location moving across the map; however, it doesn't generate a route to the destination. I was wondering if anyone knows what I need to do to fake Navigation into see my mock location as the GPS signal.<br> Thanks.</p> <pre><code>public class MockGpsProviderActivity extends Activity implements LocationListener { private MockGpsProvider mMockGpsProviderTask = null; private Integer mMockGpsProviderIndex = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); String mocLocationProvider = LocationManager.GPS_PROVIDER; locationManager.addTestProvider(mocLocationProvider, false, false, false, false, true, false, false, 0, 5); locationManager.setTestProviderEnabled(mocLocationProvider, true); locationManager.requestLocationUpdates(mocLocationProvider, 0, 0, this); try { List<String> data = new ArrayList<String>(); InputStream is = getAssets().open("test.csv"); BufferedReader reader = new BufferedReader(new InputStreamReader(is)); String line = null; while ((line = reader.readLine()) != null) { data.add(line); } // convert to a simple array so we can pass it to the AsyncTask String[] coordinates = new String[data.size()]; data.toArray(coordinates); // create new AsyncTask and pass the list of GPS coordinates mMockGpsProviderTask = new MockGpsProvider(); mMockGpsProviderTask.execute(coordinates); } catch (Exception e) {} } @Override public void onDestroy() { super.onDestroy(); // stop the mock GPS provider by calling the 'cancel(true)' method try { mMockGpsProviderTask.cancel(true); mMockGpsProviderTask = null; } catch (Exception e) {} // remove it from the location manager try { LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.removeTestProvider(MockGpsProvider.GPS_MOCK_PROVIDER); } catch (Exception e) {} } @Override public void onLocationChanged(Location location) { // show the received location in the view TextView view = (TextView) findViewById(R.id.text); view.setText( "index:" + mMockGpsProviderIndex + "\nlongitude:" + location.getLongitude() + "\nlatitude:" + location.getLatitude() + "\naltitude:" + location.getAltitude() ); } @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 } /** Define a mock GPS provider as an asynchronous task of this Activity. */ private class MockGpsProvider extends AsyncTask<String, Integer, Void> { public static final String LOG_TAG = "GpsMockProvider"; public static final String GPS_MOCK_PROVIDER = "GpsMockProvider"; /** Keeps track of the currently processed coordinate. */ public Integer index = 0; @Override protected Void doInBackground(String... data) { // process data for (String str : data) { // skip data if needed (see the Activity's savedInstanceState functionality) if(index < mMockGpsProviderIndex) { index++; continue; } // let UI Thread know which coordinate we are processing publishProgress(index); // retrieve data from the current line of text Double latitude = null; Double longitude = null; Double altitude= null; try { String[] parts = str.split(","); latitude = Double.valueOf(parts[0]); longitude = Double.valueOf(parts[1]); altitude = Double.valueOf(parts[2]); } catch(NullPointerException e) { break; } // no data available catch(Exception e) { continue; } // empty or invalid line // translate to actual GPS location Location location = new Location(LocationManager.GPS_PROVIDER); location.setLatitude(latitude); location.setLongitude(longitude); location.setAltitude(altitude); location.setTime(System.currentTimeMillis()); // show debug message in log Log.d(LOG_TAG, location.toString()); // provide the new location LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.setTestProviderLocation(LocationManager.GPS_PROVIDER, location); // sleep for a while before providing next location try { Thread.sleep(200); // gracefully handle Thread interruption (important!) if(Thread.currentThread().isInterrupted()) throw new InterruptedException(""); } catch (InterruptedException e) { break; } // keep track of processed locations index++; } return null; } @Override protected void onProgressUpdate(Integer... values) { Log.d(LOG_TAG, "onProgressUpdate():"+values[0]); mMockGpsProviderIndex = values[0]; } } } </code></pre>

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