how to get a longitude & latitude from a given address

[sameera liyanage]

I need to get a longitude & latitude from a given address ?
can any one tell me ?

[Paul Clapham]

There are web services you can contact for this sort of information. The one we use where I work belongs to Google: The Google Geocoding API. The word for what you want to do is "geocoding".

[Tim Moores]

That's what the android.location.Geocoder class does.

[sameera liyanage]

this is my java class

package com.find;

import android.app.Activity;
import android.os.Bundle;
import java.io.IOException;
import java.util.List;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;

public class GetPlace extends MapActivity {
	
	Geocoder geocoder = null;
	MapView mapView = null;

	@Override
	protected boolean isLocationDisplayed() {
		return false;
	}

	@Override
	protected boolean isRouteDisplayed() {
		return false;
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mapView = (MapView) findViewById(R.id.geoMap);
		mapView.setBuiltInZoomControls(true);
		// lat/long of Jacksonville, FL
		int lat = (int) (30.334954 * 1000000);
		int lng = (int) (-81.5625 * 1000000);
		GeoPoint pt = new GeoPoint(lat, lng);
		mapView.getController().setZoom(10);
		mapView.getController().setCenter(pt);

		geocoder = new Geocoder(this);
	}

	public void doClick(View arg0) {
		try {
			EditText loc = (EditText) findViewById(R.id.location);
			String locationName = loc.getText().toString();
			List<Address> addressList = geocoder.getFromLocationName(
					locationName, 5);
			if (addressList != null && addressList.size() > 0) {
				int lat = (int) (addressList.get(0).getLatitude() * 1000000);
				int lng = (int) (addressList.get(0).getLongitude() * 1000000);
				GeoPoint pt = new GeoPoint(lat, lng);
				mapView.getController().setZoom(15);
				mapView.getController().setCenter(pt);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

this is my main xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/hello" />
	<EditText android:layout_height="wrap_content" android:text="EditText" android:layout_width="match_parent" android:id="@+id/location"></EditText>

	<com.google.android.maps.MapView
		xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/geoMap"
		android:layout_width="fill_parent" android:layout_height="fill_parent"
		android:clickable="true" android:enabled="true"
		android:apiKey="0Tvn4iCb4u0SYc_tCFFM61j2dWjpahP8ETnKhcA" />
	
</LinearLayout>

this is the exception i am getting

09-30 22:52:02.834: DEBUG/AndroidRuntime(274): Shutting down VM
09-30 22:52:02.834: WARN/dalvikvm(274): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
09-30 22:52:02.874: ERROR/AndroidRuntime(274): FATAL EXCEPTION: main
09-30 22:52:02.874: ERROR/AndroidRuntime(274): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.draw/com.draw.FindLocation}: java.lang.ClassNotFoundException: com.draw.FindLocation in loader dalvik.system.PathClassLoader[/data/app/com.draw-1.apk]
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.os.Looper.loop(Looper.java:123)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at java.lang.reflect.Method.invokeNative(Native Method)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at java.lang.reflect.Method.invoke(Method.java:521)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at dalvik.system.NativeStart.main(Native Method)
09-30 22:52:02.874: ERROR/AndroidRuntime(274): Caused by: java.lang.ClassNotFoundException: com.draw.FindLocation in loader dalvik.system.PathClassLoader[/data/app/com.draw-1.apk]
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
09-30 22:52:02.874: ERROR/AndroidRuntime(274):     ... 11 more

}

[Tim Moores]

So Android can't find the com.draw.FindLocation class - is it part of the .apk file? It's not part of Android itself.

[sameera liyanage]

I create a new project

this is my java class

package com.arunaapplication;

import android.app.Activity;
import android.os.Bundle;
import java.io.IOException;
import java.util.List;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;

public class ArunaActivity extends MapActivity {

	Geocoder geocoder = null;
	MapView mapView = null;

	@Override
	protected boolean isLocationDisplayed() {
		return false;
	}

	@Override
	protected boolean isRouteDisplayed() {
		return false;
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.geocode);
		mapView = (MapView) findViewById(R.id.geoMap);
		mapView.setBuiltInZoomControls(true);
		// lat/long of Jacksonville, FL
		int lat = (int) (30.334954 * 1000000);
		int lng = (int) (-81.5625 * 1000000);
		GeoPoint pt = new GeoPoint(lat, lng);
		mapView.getController().setZoom(10);
		mapView.getController().setCenter(pt);
		geocoder = new Geocoder(this);
	}

	public void doClick(View arg0) {
		try {
			EditText loc = (EditText) findViewById(R.id.location);
			String locationName = loc.getText().toString();
			List<Address> addressList = geocoder.getFromLocationName(
					locationName, 5);
			if (addressList != null && addressList.size() > 0) {
				int lat = (int) (addressList.get(0).getLatitude() * 1000000);
				int lng = (int) (addressList.get(0).getLongitude() * 1000000);
				GeoPoint pt = new GeoPoint(lat, lng);
				mapView.getController().setZoom(15);
				mapView.getController().setCenter(pt);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

this is main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<EditText android:text="EditText" android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/location"></EditText>
</LinearLayout>

this is geocodexml file

<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/geocode.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent" android:layout_height="fill_parent">
	<LinearLayout android:layout_width="fill_parent"
		android:layout_alignParentBottom="true" android:layout_height="wrap_content"
		android:orientation="vertical">
		<EditText android:layout_width="fill_parent" android:id="@+id/location"
			android:layout_height="wrap_content" android:text="White House" />
		<Button android:id="@+id/geocodeBtn" android:layout_width="wrap_content"
			android:layout_height="wrap_content" android:onClick="doClick"
			android:text="Find Location" />
	</LinearLayout>
	<com.google.android.maps.MapView
		android:id="@+id/geoMap" android:clickable="true"
		android:layout_width="fill_parent" android:layout_height="320px"
		android:apiKey="0Tvn4iCb4u0SYc_tCFFM61j2dWjpahP8ETnKhcA" />
</RelativeLayout>

this is th\e error

10-01 08:41:32.854: ERROR/AndroidRuntime(325): FATAL EXCEPTION: main
10-01 08:41:32.854: ERROR/AndroidRuntime(325): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.arunaapplication/com.arunaapplication.ArunaActivity}: java.lang.ClassNotFoundException: com.arunaapplication.ArunaActivity in loader dalvik.system.PathClassLoader[/data/app/com.arunaapplication-1.apk]
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.os.Looper.loop(Looper.java:123)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.ActivityThread.main(ActivityThread.java:4627)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at java.lang.reflect.Method.invokeNative(Native Method)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at java.lang.reflect.Method.invoke(Method.java:521)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at dalvik.system.NativeStart.main(Native Method)
10-01 08:41:32.854: ERROR/AndroidRuntime(325): Caused by: java.lang.ClassNotFoundException: com.arunaapplication.ArunaActivity in loader dalvik.system.PathClassLoader[/data/app/com.arunaapplication-1.apk]
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
10-01 08:41:32.854: ERROR/AndroidRuntime(325):     ... 11 more

[Michal Krawczyk]

Here is working code:

SearchByAddress.java

package pl.kravczoo.android;

import java.util.List;

import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;

public class SearchByAddress extends MapActivity {

	MapView mapView = null;

	Geocoder geocoder = null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.view);

		mapView = (MapView) findViewById(R.id.geoMap);
		mapView.setBuiltInZoomControls(true);
		mapView.setClickable(true);

		// map starting point
		int lat = (int) (51.678383 * 1000000);
		int lng = (int) (19.334822 * 1000000);
		GeoPoint pt = new GeoPoint(lat, lng);
		mapView.getController().setZoom(18);
		mapView.getController().setCenter(pt);

		Button geoBtn = (Button) findViewById(R.id.geocodeBtn);

		geocoder = new Geocoder(this);

		geoBtn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				try {
					EditText locale = (EditText) findViewById(R.id.location);
					String locationName = locale.getText().toString();

					List<Address> addressList = geocoder.getFromLocationName(
							locationName, 5);
					if (addressList != null && addressList.size() > 0) {
						int lat = (int) (addressList.get(0).getLatitude() * 1e6);
						int lng = (int) (addressList.get(0).getLongitude() * 1e6);

						TextView pozycja = (TextView) findViewById(R.id.position);
						pozycja.setText("lat: "
								+ addressList.get(0).getLatitude() + " lng: "
								+ addressList.get(0).getLongitude());

						GeoPoint pt = new GeoPoint(lat, lng);
						mapView.getController().setZoom(18);
						mapView.getController().setCenter(pt);

					}
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	@Override
	public boolean isLocationDisplayed() {
		return false;
	}

	@Override
	public boolean isRouteDisplayed() {
		return false;
	}
}

view.xml
<?xml version="1.0" encoding="UTF-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:orientation="vertical"> <EditText android:id="@+id/location" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Address here..." /> <Button android:id="@+id/geocodeBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Search" /> <TextView android:id="@+id/position" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Latitude/Longitude..." /> </LinearLayout> <com.google.android.maps.MapView android:id="@+id/geoMap" android:layout_width="fill_parent" android:layout_height="320px" android:clickable="true" android:apiKey="your-api-key" /> </RelativeLayout>

[sameera liyanage]

I try this with your example .then it gives this error.please see attachment.

[Maneesh Godbole]

Instead of posting attachments, it would help if you copy paste the stack trace

[Michal Krawczyk]

I run my code which I paste above and everything is ok.
Execution result is on the image placed here

Your console says there is a problem with your device. You tried run application once or maybe more?

You can try choose your Android API version 1.6, I know that can help sometimes.