Android 如何找到当前的城市
我已经尝试了很多代码来查找当前的城市,但没有一个能像模拟器一样在设备上工作。。。。他们给我的位置是空的Android 如何找到当前的城市,android,Android,我已经尝试了很多代码来查找当前的城市,但没有一个能像模拟器一样在设备上工作。。。。他们给我的位置是空的 locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
}
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
请给出这个代码为什么给我空值的解决方案
private String getCompleteAddressString(double LATITUDE, double LONGITUDE) {
String strAdd = "";
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = geocoder.getFromLocation(LATITUDE, LONGITUDE, 1);
String address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
String city = addresses.get(0).getLocality();
String postalCode = addresses.get(0).getPostalCode();
String one3 = addresses.get(0).getSubLocality();
if (addresses != null) {
Address returnedAddress = addresses.get(0);
StringBuilder strReturnedAddress = new StringBuilder("");
for (int i = 0; i < returnedAddress.getMaxAddressLineIndex(); i++) {
strReturnedAddress
.append(returnedAddress.getAddressLine(i)).append(
"\n");
}
strAdd = strReturnedAddress.toString();
et_longitude.setText("" + LONGITUDE);
et_latitude.setText("" + LATITUDE);
et_street_no.setText(address);
// et_street_name.setText(one3);
et_surburb.setText(postalCode);
et_city.setText(city);
} else {
Log.e("", "My Current location address No Address returned!");
}
} catch (Exception e) {
e.printStackTrace();
Log.e("", "My Current location address No Address returned!");
}
return strAdd;
}
通过这个方法,你可以得到当前的latlnget_city。SettexCity是你当前的城市,但在这个方法中,我需要纬度和经度…在我使用的问题中,这个值为0。所以请尝试解决这些问题。表示如何查找lat long。获取位置空:是否添加权限??是的,亲爱的!!!!正如你们在我的问题中看到的,我也尝试了这段代码,但仍然不知道会发生什么?更好的方法是..你们应该使用GPSTracker类来获取当前的latlng
mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
Location location = mlocManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
Log.e("TAG","Lat : " + location.getLatitude());
Log.e("TAG","Lng : " + location.getLongitude());