Develop Reference

How to get Latitude Longitude from more than 500 addresses?

I have more than 700 addresses in database.
I want to plot them region wise.
I have implement this code :
public LatLng getSingleLocationFromAddress(String strAddress)
{
Geocoder coder = new Geocoder(this, Locale.getDefault());
List<Address> address = null;
Address location = null;
GeoPoint p1 = null;
LatLng temp = null;//new LatLng(26.0000, 121.0000);
String strAddresNew = strAddress.replace(",", " ");
try
{
address = coder.getFromLocationName(strAddresNew, 1);
if (!address.isEmpty())
{
location = address.get(0);
location.getLatitude();
location.getLongitude();
temp = new LatLng(location.getLatitude(), location.getLongitude());
Log.d("Latlng : ", temp + "");
} else
{
arrTemp.add(strAddress);
System.out.println(arrTemp);
}
} catch (IOException e)
{
Toast.makeText(mContext, e.toString(), Toast.LENGTH_LONG).show();
e.printStackTrace();
} catch (Exception e)
{
e.printStackTrace();
}
return temp;
}
But the problem is when I call this method in loop like this:
Marker TP1 = googleMap.addMarker(new MarkerOptions().position(getSingleLocationFromAddress(fullAddress)));
The line coder.getFromLocationName(strAddresNew, 1); returns null for some addresses, for example if I have an ArrayList of 7 addresses then I get only 4-5 LatLong values.

Use below lines of code...It can be helpful for you
Declare these variables above yours Oncreate or OncreatView
List<Address> From_geocode = null;
private double sLat, sLong;
private Geocoder geocoder;
Than inside yours oncreate or oncreateVIew use these lines of code
geocoder = new Geocoder(getActivity());
try {
From_geocode = geocoder.getFromLocationName("PUT THE ADDRESS HERE", 1);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
if (From_geocode.size() > 0) {
System.out.println("2");
From_geocode.get(0).getLatitude(); // getting
// latitude
From_geocode.get(0).getLongitude();
sLat = From_geocode.get(0).getLatitude();
sLong = From_geocode.get(0).getLongitude();
System.out.println("LATITUTE====="+sLat+" LONGITUTE====="+sLong);
}
And provide the entry inside the manifest file
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />

Although the google database is extensive it is possible that some of the addresses that you have supplied could not be geocoded. Hence you will not get a lat/lon for those addresses. You could probably check the status of the response.
As mentioned in the link below
https://developers.google.com/maps/documentation/geocoding/#StatusCodes
The "status" field within the Geocoding response object contains the status of the request, and may contain debugging information to help you track down why geocoding is not working. The "status" field may contain the following values:
"OK" indicates that no errors occurred; the address was successfully parsed and at least one geocode was returned.
"ZERO_RESULTS" indicates that the geocode was successful but returned no results. This may occur if the geocoder was passed a non-existent address.

Android Reverse Geocoding

I'm trying to get an address from a location. I'm doing so inside a asynctask inside a Fragement. All the other code works fine (checking an API and setting some UI stuff based on it) but this section to do the geocoding just won't. I followed an example from elsewhere on StackOverflow (can't remember the exact topic).
TextView locTxt = (TextView) findViewById(R.id.locationText);
Geocoder geocoder;
List<Address> addresses;
Double x = 55.971627;
Double y = -3.602585;
try
{
geocoder = new Geocoder(getActivity(), Locale.ENGLISH);
addresses = geocoder.getFromLocation(x, y, 1);
StringBuilder str = new StringBuilder();
if (geocoder.isPresent())
{
Toast.makeText(getApplicationContext(),
"geocoder present", Toast.LENGTH_SHORT).show();
Address returnAddress = addresses.get(0);
String localityString = returnAddress.getLocality();
String city = returnAddress.getCountryName();
String region_code = returnAddress.getCountryCode();
String zipcode = returnAddress.getPostalCode();
str.append(localityString + "");
str.append(city + "" + region_code + "");
str.append(zipcode + "");
locTxt.setText(str);
}
else
{
Toast.makeText(getApplicationContext(), "geocoder not present", Toast.LENGTH_SHORT).show();
}
} catch (IOException e) {}
When it gets to the if statement for geocoder.isPresent() is fails the if and just continues on with the rest of the program.

The issue is with Android Emulator. Even when you set coordinates via the command line the emulator will not preform GeoCoding code and therefore fails on my check if GeoCoder present. Works just fine on a physical device.

How to get the home/work address from android maps 2 sdk

When I go maps|settings|edit home or work I see my home & work address, cool!
Anybody know how to get that same information from the Android SDK? I am working on a maps app and would like to plot those to points of reference, with out asking the user for them again?
Thanks

You will need to use reverse geocoding to convert the latitude/longitude into an address. More info about geocoding can be found here.
Here is an example:
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
String result = null;
try {
List<Address> list = geocoder.getFromLocation(
location.getLatitude(), location.getLongitude(), 1);
if (list != null && list.size() > 0) {
Address address = list.get(0);
// sending back first address line and locality
result = address.getAddressLine(0) + ", " + address.getLocality();
}
} catch (IOException e) {
Log.e(TAG, "Impossible to connect to Geocoder", e);
}

How to get city name ontap on the map in google map android v2?

By tapping on the map, How can I get the address of that location. On tap at particular location we can able listen and pass those co-ordinates we can get address but it should make work in android Google map v2.

If you have your LatLng data - it's quite easy. You need to use Goecoder.
protected String doInBackground(Location... params) {
Geocoder geocoder =
new Geocoder(mContext, Locale.getDefault());
// Get the current location from the input parameter list
Location loc = params[0];
// Create a list to contain the result address
List<Address> addresses = null;
try {
/*
* Return 1 address.
*/
addresses = geocoder.getFromLocation(loc.getLatitude(),
loc.getLongitude(), 1);
} catch (IOException e1) {
Log.e("LocationSampleActivity",
"IO Exception in getFromLocation()");
e1.printStackTrace();
return ("IO Exception trying to get address");
} catch (IllegalArgumentException e2) {
// Error message to post in the log
String errorString = "Illegal arguments " +
Double.toString(loc.getLatitude()) +
" , " +
Double.toString(loc.getLongitude()) +
" passed to address service";
Log.e("LocationSampleActivity", errorString);
e2.printStackTrace();
return errorString;
}
// If the reverse geocode returned an address
if (addresses != null && addresses.size() > 0) {
// Get the first address
Address address = addresses.get(0);
/*
* Format the first line of address (if available),
* city, and country name.
*/
String addressText = String.format(
"%s, %s, %s",
// If there's a street address, add it
address.getMaxAddressLineIndex() > 0 ?
address.getAddressLine(0) : "",
// Locality is usually a city
address.getLocality(),
// The country of the address
address.getCountryName());
// Return the text
return addressText;
} else {
return "No address found";
}
}
...
}
...
}
The best way to do it is to use AsyncTask. You will find complete example at Android Devlopers' site: http://developer.android.com/training/location/display-address.html

This may help you to use the complete map opertion

You can do this with the android GeoCoder. With GoogleMaps v2 you can use longpress to get a LatLng point. By taking those coordinates and passing them to the GeoCoder you can "reverse geocode" to find the address.

how to convert the latitude and longitudein to postal address

how to convert the latitude and longitude in to postal address. i am not possible to use mapview to get geopoint.I wanted to convert latitude and longitude in address without use of mapview

This is called Reverse Geocoding, there are number of services that you can use including Google, Yahoo and Bing
See this article for free Geocoding services

Android has GeoCoder class for this :
public String getAddress(double latitude, double longitude){
if (Geocoder.isPresent()) {
try {
Geocoder geocoder = new Geocoder(mContext, Locale.getDefault());
List<Address> addresses = geocoder.getFromLocation(latitude,longitude,1);
if(addresses != null && addresses.size() > 0) {
Address first = addresses.get(0);
StringBuilder sb = new StringBuilder();
if(first.getMaxAddressLineIndex() > 0){
sb.append(first.getAddressLine(0) + ", ");
}
sb.append(first.getLocality() + ", ");
sb.append(first.getCountryName());
return sb.toString();
} catch (Exception e) {
Log.e("MyAPP", "Reverse geo lookup failed", e);
return "Unavailable"
}
} else {
return "unavailable";
}
}

Go to project properties > Android > set project build target to Google