Here is source code of the Program to Demonstrate Geo Coding in Android. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.
Main Activity

package com.example.geocode;

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

import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

double latitude, longitude;
EditText locationName;
Button okbtn;
TextView result;

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

locationName = (EditText) findViewById(R.id.location);
okbtn = (Button) findViewById(R.id.button1);
result = (TextView) findViewById(R.id.textView1);

// Log.v("msg",(Locale.getDefault().toString()));

okbtn.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

Geocoder geocoder = new Geocoder(getBaseContext(), Locale
.getDefault());

try {
List

address;

address = geocoder.getFromLocationName(locationName
.getText().toString(), 1);
if (address.size() > 0) {
latitude = address.get(0).getLatitude();
longitude = address.get(0).getLongitude();
}

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {

}

result.setText("" + latitude + "\n" + longitude);

}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}


Main Activity
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />



<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="86dp"
android:text="OK" />

<EditText
android:id="@+id/location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button1"
android:layout_below="@+id/textView1"
android:layout_marginTop="22dp"
android:ems="10" >

<requestFocus />
</EditText>

</RelativeLayout>