我需要通过GPS程序获得我的当前位置。 我怎样才能做到呢?
当前回答
class MyLocation {
Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled = false;
boolean network_enabled = false;
public boolean getLocation(Context context, LocationResult result) {
// I use LocationResult callback class to pass location value from
// MyLocation to user code.
locationResult = result;
if (lm == null)
lm = (LocationManager) context
.getSystemService(Context.LOCATION_SERVICE);
// Exceptions will be thrown if the provider is not permitted.
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
}
catch (Exception ex) {
}
try {
network_enabled = lm
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}
catch (Exception ex) {
}
// Don't start listeners if no provider is enabled.
if (!gps_enabled && !network_enabled)
return false;
if (gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
locationListenerGps);
if (network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
locationListenerNetwork);
timer1 = new Timer();
timer1.schedule(new GetLastLocation(), 5000);
return true;
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
class GetLastLocation extends TimerTask {
@Override
public void run() {
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
Location net_loc = null, gps_loc = null;
if (gps_enabled)
gps_loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (network_enabled)
net_loc = lm
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
// If there are both values, use the latest one.
if (gps_loc != null && net_loc != null) {
if (gps_loc.getTime() > net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
locationResult.gotLocation(net_loc);
return;
}
if (gps_loc != null) {
locationResult.gotLocation(gps_loc);
return;
}
if (net_loc != null) {
locationResult.gotLocation(net_loc);
return;
}
locationResult.gotLocation(null);
}
}
public static abstract class LocationResult {
public abstract void gotLocation(Location location);
}
}
我希望这对你有所帮助……
其他回答
通过-获取gps位置
LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener()
{
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
double latitude = location.getLatitude();
double longitude = location.getLongitude();
double speed = location.getSpeed(); //spedd in meter/minute
speed = (speed*3600)/1000; // speed in km/minute Toast.makeText(GraphViews.this, "Current speed:" + location.getSpeed(),Toast.LENGTH_SHORT).show();
}
};
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
}
你需要使用latest/最新的
GoogleApiClient Api
基本上你需要做的是:
private GoogleApiClient mGoogleApiClient;
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
然后
@Override
public void onConnected(Bundle connectionHint) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
}
}
为最准确可靠的定位。请看我的帖子:
https://stackoverflow.com/a/33599228/2644905
不要使用LocationListener,它是不准确的,有延迟响应。老实说,这更容易实现。 请阅读文档:https://developers.google.com/android/reference/com/google/android/gms/common/api/GoogleApiClient
Edit 2022:不要使用这个库,因为该库有内存泄漏,不再支持/更新。
我将推荐使用智能位置库 使用起来非常简单,它很好地包装了位置逻辑。
启动位置服务:
SmartLocation.with(context).location()
.start(new OnLocationUpdatedListener() { ... });
如果你只想获得一个单一的位置(不是周期性的),你可以使用oneFix修饰符。例子:
SmartLocation.with(context).location()
.oneFix()
.start(new OnLocationUpdatedListener() { ... });
对于位置检查,您可以使用以下代码。你可以把它放在你的onStart()的主活动和显示警报对话框,如果返回为false。
private boolean isLocationAccurate()
{
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT)
{
String provider = Settings.Secure
.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if (provider != null && !provider.contains("gps"))
{
return false;
}
}
else
{
try
{
int status = Settings.Secure
.getInt(this.getContentResolver(), Settings.Secure.LOCATION_MODE);
if (status != Settings.Secure.LOCATION_MODE_HIGH_ACCURACY)
{
return false;
}
}
catch (Settings.SettingNotFoundException e)
{
Log.e(TAG, e.getMessage());
}
}
return true;
}
简单的找到写代码在位置方法
public void onLocationChanged(Location location) {
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mCurrLocationMarker = mMap.addMarker(markerOptions);
//move map camera
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(18));
PolylineOptions pOptions = new PolylineOptions()
.width(5)
.color(Color.GREEN)
.geodesic(true);
for (int z = 0; z < routePoints.size(); z++) {
LatLng point = routePoints.get(z);
pOptions.add(point);
}
line = mMap.addPolyline(pOptions);
routePoints.add(latLng);
}
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