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'Android GoogleMap API V2'에 해당되는 글 1건

  1. 2014.01.19 Android GoogleMap API V2

Android GoogleMap API V2

Programming/Android 2014. 1. 19. 11:50 Posted by TanSanC
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Android Geocoding – Showing User Input Location on Google Map Android API V2



In this article, we will create an Android application which facilitates users to input street address in an EditText and on clicking the find button, application draws corresponding location marker on the Google Map Android API v2 using Google’s Geocoder API.

This application is an upgraded version of the application discussed in the article titled “Android Geocoding – Showing User Input Location on Google Map” where the location is shown in Google Map Android API v1.

This application is developed in Eclipse 4.2.1 with ADT plugin ( 21.0.0 ) and Android SDK ( 21.0.0 ) and is tested in a real Android Phone with Android 2.3.6  ( GingerBread ).

1. Download and configure Google Play Services Library in Eclipse

Please follow the given below link to setup Google Play Service library in Eclipse.

http://developer.android.com/google/play-services/setup.html

2. Create a new Android Application Project namely “LocationGeocodingV2″

Create new Android application project

Figure 1 : Create new Android application project

3. Configure Android Application Project

Configure Android Application Project

Figure 2 : Configure Android Application Project

4. Design Application Launcher Icon

Design Application Launcher Icon

Figure 3 : Design Application Launcher Icon

5. Create a blank activity

Create a blank activity

Figure 4 : Create a blank activity

6. Enter Main Activity Details

Enter Main Activity Details

Figure 5 : Enter Main Activity Details

7. Link to Google Play Service Library

Link to Google Play Services Library

Figure 6 : Link to Google Play Services Library

8. Get the API key for Google Maps Android API v2

We need to get an API key from Google to use Google Maps in Android application. Please follow the given below link to get the API key for Google Maps Android API v2.

https://developers.google.com/maps/documentation/android/start

9. Add Android Support library to this project

By default, Android support library (android-support-v4.jar ) is added to this project by Eclipse IDE to the directory libs. If it is not added, we can do it manually by doing the following steps :

  • Open Project Explorer by Clicking “Window -> Show View -> Project Explorer”
  • Right click this project
  • Then from popup window, Click “Android Tools -> Add Support Library “

10. Update the file AndroidManfiest.xml

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="in.wptrafficanalyzer.locationgeocodingv2"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />
 
    <permission
        android:name="in.wptrafficanalyzer.locationgeocodingv2.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
 
    <uses-permission android:name="in.wptrafficanalyzer.locationgeocodingv2.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="in.wptrafficanalyzer.locationgeocodingv2.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="YOUR_API_KEY"/>
    </application>
</manifest>

11. Update the layout file res/layout/activity_main.xml

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<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity" >
 
    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >
 
        <Button
            android:id="@+id/btn_find"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/str_btn_find"
            android:layout_alignParentRight="true" />
 
        <EditText
            android:id="@+id/et_location"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:inputType="text"
            android:hint="@string/hnt_et_location"
            android:layout_toLeftOf="@id/btn_find" />
 
    </RelativeLayout>
 
    <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" />
 
</LinearLayout>

12. Update the file res/values/strings.xml

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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">LocationGeocodingV2</string>
    <string name="hello_world">Hello world!</string>
    <string name="menu_settings">Settings</string>
    <string name="str_btn_find">Find</string>
    <string name="hnt_et_location">Enter location</string>
</resources>

13. Update the file src/in/wptrafficanalyzer/locationgeocodingv2/MainActivity.java

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package in.wptrafficanalyzer.locationgeocodingv2;
 
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));
            }
        }
    }
}

14. Screenshot of the application in execution

Showing Street Address in Google Map Android API V2

Figure 7 : Showing Street Address in Google Map Android API V2

15. Download Source Code









출처 : http://wptrafficanalyzer.in/blog/android-geocoding-showing-user-input-location-on-google-map-android-api-v2/



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