Android Geocoding – Showing User Input Location on Google Map Android API V2

Step 1 :- Create New Android Project.



Step 2 :- Add Google-play-services_lib to your project.

Step 3 :- Open AndroidManifest.xml file.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mapv2.demo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />
   
    <permission
        android:name="com.mapv2.demo.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
    
    <uses-permission android:name="com.mapv2.demo.permission.MAPS_RECEIVE"/>
    
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
   
    <uses-feature
          android:glEsVersion="0x00020000"
          android:required="true"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
       
        <activity
            android:name="com.mapv2.demo.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
       
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyCmX7SLVHXxU9pSqb2QbAOvdnjAGUulOrk"/>
       
    </application>

</manifest>
Step 4 :- Open activity_main.xml.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/map"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          class="com.google.android.gms.maps.SupportMapFragment"/>
</RelativeLayout>

Step 5 :- Open MainActivity.java

package com.mapv2.demo;

import java.io.IOException;
import java.util.List;

import android.location.Address;
import android.location.Geocoder;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends FragmentActivity {
   
    GoogleMap googleMap;
    MarkerOptions markerOptions;
    LatLng latLng;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        SupportMapFragment supportMapFragment = (SupportMapFragment)
                getSupportFragmentManager().findFragmentById(R.id.map);

        // Getting a reference to the map
        googleMap = supportMapFragment.getMap();
       
        // Getting reference to btn_find of the layout activity_main
        Button btn_find = (Button) findViewById(R.id.btn_find);
       
        // Defining button click event listener for the find button
        OnClickListener findClickListener = new OnClickListener() {           
            @Override
            public void onClick(View v) {
                // Getting reference to EditText to get the user input location
                EditText etLocation = (EditText) findViewById(R.id.et_location);
               
                // Getting user input location
                String location = etLocation.getText().toString();
               
                if(location!=null && !location.equals("")){
                    new GeocoderTask().execute(location);
                }
            }
        };
       
        // Setting button click event listener for the find button
        btn_find.setOnClickListener(findClickListener);       
       
       
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
   
   
    // An AsyncTask class for accessing the GeoCoding Web Service
        private class GeocoderTask extends AsyncTask<String, Void, List<Address>>{

            @Override
            protected List<Address> doInBackground(String... locationName) {
                // Creating an instance of Geocoder class
                Geocoder geocoder = new Geocoder(getBaseContext());
                List<Address> addresses = null;
               
                try {
                    // Getting a maximum of 3 Address that matches the input text
                    addresses = geocoder.getFromLocationName(locationName[0], 3);
                } catch (IOException e) {
                    e.printStackTrace();
                }           
                return addresses;
            }
           
           
            @Override
            protected void onPostExecute(List<Address> addresses) {           
               
                if(addresses==null || addresses.size()==0){
                    Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show();
                }
               
                // Clears all the existing markers on the map
                googleMap.clear();
               
                // Adding Markers on Google Map for each matching address
                for(int i=0;i<addresses.size();i++){               
                   
                    Address address = (Address) addresses.get(i);
                   
                    // Creating an instance of GeoPoint, to display in Google Map
                    latLng = new LatLng(address.getLatitude(), address.getLongitude());
                   
                    String addressText = String.format("%s, %s",
                            address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
                            address.getCountryName());

                    markerOptions = new MarkerOptions();
                    markerOptions.position(latLng);
                    markerOptions.title(addressText);

                    googleMap.addMarker(markerOptions);
                   
                    // Locate the first location
                    if(i==0)                       
                        googleMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));    
                }           
            }       
        }
}


Step 6 :- Run Code.

Step 7 :- Download Code :- https://dl.dropboxusercontent.com/u/109954727/Map/map5.zip