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This tutorial is for plot address on Google map. You can get location in 2 different way, You can directly type address on TextField and get it's location on map OR you can press and hold on Google map and get it's physical address.
Here, is the full tutorial for both methods. It is possible with Geocoder class of Google Map. I have described step by step below:
1. Create project named "FindAddressGoogleMap" or something else, whatever you want.
2. Create android API Key for your application's package name. If you don't know how to create Google API key, Refer, http://developerandro.blogspot.in/2015/07/google-maps-v2-integration-in-android.html . It gives you full desciption, How to create Google Map API for Android and it's usage.
3. Copy below code in your project.
AndroidMenifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="demo.findaddress.com.findaddressdemo" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but are recommended.
-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="@string/title_activity_maps" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
activity_map.xml (Layout File)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal"
android:padding="2dp" >
<EditText
android:id="@+id/etAddress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left|top"
android:hint="Address"
android:lines="4"
android:padding="10dp"
android:textSize="20dp" />
<ImageButton
android:id="@+id/btnSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:gravity="center"
android:padding="15dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:scaleType="fitCenter"
android:src="@android:drawable/ic_menu_search" />
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
</LinearLayout>
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
- Create new Java class file and Name it "GeocodeJSONParser". Copy below code in this file:
GeocodeJSONParser.java
public class GeocodeJSONParser {
/** Receives a JSONObject and returns a list */
public List<HashMap<String,String>> parse(JSONObject jObject){
JSONArray jPlaces = null;
try {
/** Retrieves all the elements in the 'places' array */
jPlaces = jObject.getJSONArray("results");
} catch (JSONException e) {
e.printStackTrace();
}
/** Invoking getPlaces with the array of json object
* where each json object represent a place
*/
return getPlaces(jPlaces);
}
private List<HashMap<String, String>> getPlaces(JSONArray jPlaces){
int placesCount = jPlaces.length();
List<HashMap<String, String>> placesList = new ArrayList<HashMap<String,String>>();
HashMap<String, String> place = null;
/** Taking each place, parses and adds to list object */
for(int i=0; i<placesCount;i++){
try {
/** Call getPlace with place JSON object to parse the place */
place = getPlace((JSONObject)jPlaces.get(i));
placesList.add(place);
} catch (JSONException e) {
e.printStackTrace();
}
}
return placesList;
}
/** Parsing the Place JSON object */
private HashMap<String, String> getPlace(JSONObject jPlace){
HashMap<String, String> place = new HashMap<String, String>();
String formatted_address = "-NA-";
String lat="";
String lng="";
try {
// Extracting formatted address, if available
if(!jPlace.isNull("formatted_address")){
formatted_address = jPlace.getString("formatted_address");
}
lat = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lat");
lng = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lng");
place.put("formatted_address", formatted_address);
place.put("lat", lat);
place.put("lng", lng);
}catch (JSONException e) {
e.printStackTrace();
}
return place;
}
}
MapsActivity.java
public class MapsActivity extends FragmentActivity {
private GoogleMap mMap;
EditText etAddress;
ImageButton ibSearch;
LatLng latLng;
ProgressDialog progDailog;
ProgressBar progressBar;
Double latitude, longitude;
MarkerOptions markerOptions;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
etAddress = (EditText) findViewById(R.id.etAddress);
ibSearch = (ImageButton) findViewById(R.id.btnSearch);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
ibSearch.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String location = etAddress.getText().toString();
if (location == null || location.equals("")) {
Toast.makeText(MapsActivity.this, "No place found",
Toast.LENGTH_SHORT).show();
setProgress(false);
return;
}
locationOnMap(location);
}
});
mMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {
public void onMapLongClick(LatLng latLng) {
mMap.clear();
latitude = latLng.latitude;
longitude = latLng.longitude;
mMap.animateCamera(CameraUpdateFactory
.newLatLng(latLng));
markerOptions = new MarkerOptions();
markerOptions.position(latLng);
mMap.addMarker(markerOptions);
//---------------
try {
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(MapsActivity.this, Locale.getDefault());
addresses = geocoder.getFromLocation(latitude, longitude, 1); // Here 1 represent max location result to returned, by documents it recommended 1 to 5
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 state = addresses.get(0).getAdminArea();
String country = addresses.get(0).getCountryName();
String postalCode = addresses.get(0).getPostalCode();
String knownName = addresses.get(0).getFeatureName();
etAddress.setText(address + "\n" + city + "\n" + state + "\n" + country +
"\n" + postalCode + "\n" + knownName);
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(MapsActivity.this, "Error:" + e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
private void locationOnMap(String location) {
String url = "https://maps.googleapis.com/maps/api/geocode/json?";
setProgress(true);
try {
location = URLEncoder.encode(location, "utf-8");
} catch (UnsupportedEncodingException e) {
setProgress(false);
e.printStackTrace();
}
String address = "address=" + location;
String sensor = "sensor=false";
url = url + address + "&" + sensor;
DownloadTask downloadTask = new DownloadTask();
downloadTask.execute(url);
}
private class DownloadTask extends AsyncTask<String, Integer, String> {
String data = null;
@Override
protected String doInBackground(String... url) {
try {
data = downloadUrl(url[0]);
} catch (Exception e) {
setProgress(false);
}
return data;
}
@Override
protected void onPostExecute(String result) {
ParserTask parserTask = new ParserTask();
parserTask.execute(result);
}
}
private String downloadUrl(String strUrl) throws IOException {
String data = "";
InputStream iStream = null;
HttpURLConnection urlConnection = null;
try {
URL url = new URL(strUrl);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(
iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
sb.append(line);
}
data = sb.toString();
br.close();
} catch (Exception e) {
Log.d("Exception while downloading url", e.toString());
} finally {
setProgress(false);
iStream.close();
urlConnection.disconnect();
}
return data;
}
class ParserTask extends
AsyncTask<String, Integer, List<HashMap<String, String>>> {
JSONObject jObject;
@Override
protected List<HashMap<String, String>> doInBackground(
String... jsonData) {
List<HashMap<String, String>> places = null;
GeocodeJSONParser parser = new GeocodeJSONParser();
try {
jObject = new JSONObject(jsonData[0]);
places = parser.parse(jObject);
} catch (Exception e) {
setProgress(false);
Log.d("Exception", e.toString());
}
return places;
}
@Override
protected void onPostExecute(List<HashMap<String, String>> list) {
// Clears all the existing markers
mMap.clear();
setProgress(false);
for (int i = 0; i < list.size(); i++) {
if (i == 0) {
HashMap<String, String> hmPlace = list.get(i);
double lat = Double.parseDouble(hmPlace.get("lat"));
double lng = Double.parseDouble(hmPlace.get("lng"));
String name = hmPlace.get("formatted_address");
plotMarker(lat, lng, name);
break;
}
}
}
}
private void plotMarker(double lati, double longi, String name) {
MarkerOptions markerOptions = new MarkerOptions();
LatLng latLng = new LatLng(lati, longi);
markerOptions.position(latLng);
markerOptions.title(name);
mMap.addMarker(markerOptions);
// googleMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 12f));
latitude = lati;
longitude = longi;
}
private void setProgress(final boolean bol) {
runOnUiThread(new Runnable() {
@Override
public void run() {
if (bol) {
ibSearch.setVisibility(View.GONE);
progressBar.setVisibility(View.VISIBLE);
etAddress.setEnabled(false);
} else {
ibSearch.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
etAddress.setEnabled(true);
}
}
});
}
}
- Done ! Now run project an you should get output as above screenshots.
