在導航應用中使用模擬位置

Question

我正在嘗試開發一個應用程序來模擬通過Google導航應用程序的路線。我發現了一些很好的例子，說明如何在本網站的其他一些帖子中實現模擬位置提供程序（Android mock location on device?）。
通過對源代碼http://www.cowlumbus.nl/forum/MockGpsProvider.zip的簡單修改，我的模擬位置顯示在Google的地圖應用程序中。 （唯一的變化是LocationManager.GPS_PROVIDER的模擬提供者名稱）。
我的問題是，當我打開導航應用程序，它說「搜索GPS信號。」。我仍然看到我的位置在地圖上移動;但是，它不會生成到目的地的路線。我想知道是否有人知道我需要做什麼來僞造導航，以查看我的模擬位置作爲GPS信號。
謝謝。

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]; 
    } 
} 
} 

Answer 1

這是我失蹤：

location.setLatitude(latitude); 
location.setLongitude(longitude); 
location.setAccuracy(16F); 
location.setAltitude(0D); 
location.setTime(System.currentTimeMillis()); 
location.setBearing(0F); 

而且，它calcaulte軸承導航是非常重要的。否則，路線更新將不準確。