【发布时间】：2014-04-03 11:58:16
【问题描述】：
我试图从 gps 坐标中获取我当前的位置。我看到了很多我应该如何做到这一点的例子。当我尝试将我的代码与示例代码合并时，我在这一行得到一个错误：
lm.requestLocationUpdates(provider, 1, 0, locationListener);
它说：
The method requestLocationUpdates(String, long, float, LocationListener) in the type LocationManager is not applicable for the arguments (String, int, int, LocationListener)
哪里可能有问题..？花几个小时寻找问题..
public class MyLocationDemoActivity extends FragmentActivity implements
ConnectionCallbacks,
OnConnectionFailedListener,
LocationListener,
OnMyLocationButtonClickListener{
GMapV2Direction md;
private GoogleMap mMap;
GeoPoint gp;
private LocationClient mLocationClient;
LocationManager lm;
private TextView mMessageView;
Bundle extras;
Location mycurrent;
LatLng endpoint;
Location mCurrentLocation;
static double currentlatid;
static double currentlonid;
private static final LocationRequest REQUEST = LocationRequest.create()
.setInterval(16000) // 16 seconds
.setFastestInterval(16) // 16ms = 60fps
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_location_demo);
Intent intent = getIntent();
RouteActivity route = new RouteActivity();
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new MyLocationListener();
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
String provider = lm.getBestProvider(criteria, true);
Location mostRecentLocation = lm.getLastKnownLocation(provider);
if(mostRecentLocation != null) {
currentlatid=mostRecentLocation.getLatitude();
currentlonid=mostRecentLocation.getLongitude();
}
lm.requestLocationUpdates(provider, 1, 0, locationListener);
extras = getIntent().getExtras();
LatLng a = null;
try {
a = (LatLng) extras.get("coord");
} catch (Exception x) {
}
if (a == null) {
try {
LatLng x = new LatLng(mycurrent.getLatitude(),
mycurrent.getLongitude());
a = x;
System.out.print(a);
} catch (Exception x) {
}
System.out.print(a);
}
LatLng b ;
try{
b = (LatLng) extras.get("Obj1");
endpoint = b;
draw_route(a, b);
}catch(Exception e){
}
LatLng c = null;
try {
c = (LatLng) extras.get("Obj2");
endpoint = c;
b = (LatLng) extras.get("Obj1");
draw_route(b, c);
} catch (Exception e) {
System.out.println("smth went wrong");
}
try {
LatLng d = (LatLng) extras.get("Obj3");
endpoint = d;
draw_route(c, d);
} catch (Exception e) {
System.out.println("smth went wrong");
}
// mMap.addMarker(new MarkerOptions().position(a));
try{
mMap.setMyLocationEnabled(true);
mMap.setOnMyLocationButtonClickListener(this);
}catch(Exception e ){
}
}
// }
private final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
updateWithNewLocation(location);
}
public void onProviderDisabled(String provider) {
updateWithNewLocation(null);
}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider,int status,Bundle extras){}
};
private void updateWithNewLocation(Location location) {
// TextView myLocationText = (TextView) findViewById(R.id.text);
String latLongString = "";
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
latLongString = "Lat:" + lat + "\nLong:" + lng;
} else {
latLongString = "No location found";
}
// myLocationText.setText("Your Current Position is:\n" + latLongString);
}
private void setUpLocationClientIfNeeded() {
if (mLocationClient == null) {
mLocationClient = new LocationClient(getApplicationContext(), this, // ConnectionCallbacks
this); // OnConnectionFailedListener
}
}
public void draw_route(LatLng start, LatLng finish) {
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
md = new GMapV2Direction();
mMap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
LatLng coordinates = new LatLng(54.72, 25.3);
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinates, 10));
mMap.addMarker(new MarkerOptions().position(start).title("Start"));
mMap.addMarker(new MarkerOptions().position(finish).title("End"));
Document doc = md.getDocument(start, finish,
GMapV2Direction.MODE_DRIVING);
int duration = md.getDurationValue(doc);
String distance = md.getDistanceText(doc);
String start_address = md.getStartAddress(doc);
String copy_right = md.getCopyRights(doc);
ArrayList<LatLng> directionPoint = md.getDirection(doc);
PolylineOptions rectLine = new PolylineOptions().width(3).color(
Color.RED);
for (int i = 0; i < directionPoint.size(); i++) {
rectLine.add(directionPoint.get(i));
}
mMap.addPolyline(rectLine);
}
/**
* Button to get current Location. This demonstrates how to get the current
* Location as required without needing to register a LocationListener.
*/
public void showMyLocation(View view) {
if (mLocationClient != null && mLocationClient.isConnected()) {
String msg = "Location = " + mLocationClient.getLastLocation();
Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT)
.show();
mycurrent = mLocationClient.getLastLocation();
}
}
/**
* Implementation of {@link LocationListener}.
*/
@Override
public void onLocationChanged(Location location) {
mMessageView.setText("Location = " + location);
Toast.makeText(this, "MyLocation button clicked", 50000000)
.show();
draw_route(new LatLng(location.getLatitude(), location.getLongitude()), endpoint);
}
/**
* Callback called when connected to GCore. Implementation of
* {@link ConnectionCallbacks}.
*/
@Override
public void onConnected(Bundle connectionHint) {
mLocationClient.requestLocationUpdates(REQUEST, this); // LocationListener
mCurrentLocation = mLocationClient.getLastLocation();
System.out.println("@@@@@@@@@@@@@\n"+mCurrentLocation+"\n@@2222222@@@@@@@@@@@``");
}
/**
* Callback called when disconnected from GCore. Implementation of
* {@link ConnectionCallbacks}.
*/
@Override
public void onDisconnected() {
// Do nothing
}
/**
* Implementation of {@link OnConnectionFailedListener}.
*/
@Override
public void onConnectionFailed(ConnectionResult result) {
// Do nothing
}
@Override
public boolean onMyLocationButtonClick() {
Toast.makeText(this, "MyLocation button clicked", Toast.LENGTH_SHORT)
.show();
// Return false so that we don't consume the event and the default
// behavior still occurs
// (the camera animates to the user's current position).
return false;
}
class MyLocationListener implements LocationListener {
@Override
public void onLocationChanged(Location loc) {
if (loc != null) {
currentlatid = loc.getLatitude();
currentlonid = loc.getLongitude();
float accuracyd = loc.getAccuracy();
String providershown = loc.getProvider();
}
}
}}
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