在导航应用程序中使用模拟位置 [英] Using a Mock Location in Navigation App
问题描述
我正在尝试开发一个应用程序来模拟通过 Google 导航应用程序的路线.我在本网站的一些其他帖子中找到了一些关于如何实现模拟位置提供程序的优秀示例(Android在设备上模拟位置?).
对源代码进行简单的修改http://www.cowlumbus.nl/forum/MockGpsProvider.zip，我的模拟位置会显示在 Google 的地图应用程序中.(唯一的变化是将模拟提供程序名称更改为 LocationManager.GPS_PROVIDER).
我的问题是，当我打开导航应用程序时，它显示正在搜索 GPS 信号".我仍然看到我的位置在地图上移动；但是，它不会生成到目的地的路线.我想知道是否有人知道我需要做些什么来伪造导航以将我的模拟位置视为 GPS 信号.
谢谢.
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 ( Android mock location on device? ).
With a simple modification to the source code http://www.cowlumbus.nl/forum/MockGpsProvider.zip, my mock location shows up in Google's Maps application. (The only change is the mock provider name to LocationManager.GPS_PROVIDER).
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.
Thanks.
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
+ "
longitude:" + location.getLongitude()
+ "
latitude:" + location.getLatitude()
+ "
altitude:" + 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];
}
}
}
推荐答案
这是我所缺少的:
location.setLatitude(latitude);
location.setLongitude(longitude);
location.setAccuracy(16F);
location.setAltitude(0D);
location.setTime(System.currentTimeMillis());
location.setBearing(0F);
此外，计算导航方位也很重要.否则，路由更新将不准确.
Also, it is important to calcaulte the bearing for navigation. Otherwise, the route updates will be inaccurate.
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