Name, Phone Number, Email Validation using Saripaar Example in Android

Download Saripaar Library from gitHub 

 url : https://github.com/ragunathjawahar/android-saripaar

Add Saripaar Library Project to your project, (same method of adding actionbarsherlock to your project)

main.xml

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="18dp"
            android:layout_marginTop="30dp"
            android:text="Name"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:id="@+id/name_add_edit_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignTop="@+id/textView1"
            android:ems="10" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/textView1"
            android:layout_below="@id/name_add_edit_text"
            android:layout_marginTop="60dp"
            android:text="IpAddress"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:id="@+id/ipaddress_edit_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/textView2"
            android:layout_alignBottom="@+id/textView2"
            android:layout_toRightOf="@+id/textView2"
            android:ems="10" />

        <CheckBox
            android:id="@+id/terms_conditions_checkbox"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/textView2"
            android:layout_below="@id/ipaddress_edit_text"
            android:layout_marginTop="56dp"
            android:text="I accept terms and conditions" />

        <Button
            android:id="@+id/add_edit_done_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/terms_conditions_checkbox"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="27dp"
            android:text="SAVE" />

    </RelativeLayout>

PhoneNumberEmailValidationActivity.java

package com.rajeshvijayakumar.saripaar;

import com.mobsandgeeks.saripaar.Rule;
import com.mobsandgeeks.saripaar.Validator;
import com.mobsandgeeks.saripaar.Validator.ValidationListener;
import com.mobsandgeeks.saripaar.annotation.Email;
import com.mobsandgeeks.saripaar.annotation.NumberRule;
import com.mobsandgeeks.saripaar.annotation.NumberRule.NumberType;
import com.mobsandgeeks.saripaar.annotation.Required;
import com.mobsandgeeks.saripaar.annotation.TextRule;

public class PhoneNumberEmailValidationActivity extends Activity implements ValidationListener {

    @Required(order = 1)
    @TextRule(order = 2, minLength = 5, maxLength = 35, trim = true, message = "Enter Valid Full Name")
    private EditText mNameEditText;

    @Required(order = 3)
    @Email(order = 4, message = "Please Check and Enter a valid Email Address")
    private EditText mEmailEditText;

    @Required(order = 5)
    @NumberRule(order = 6, message = "Enter Phone Number in Numeric", type = NumberType.LONG)
    @TextRule(order = 7, message = "Enter valid Phone Number", minLength = 10, maxLength = 14)
    private EditText mPhoneNumberEditText;

    private Button mAddEditButton;
    private Validator mAddEditValidator;

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

        mNameEditText = (EditText) findViewById(R.id.name);
        mEmailEditText = (EditText) findViewById(R.id.email_address);
        mPhoneNumberEditText = (EditText) findViewById(R.id.phone_number);
        mAddEditButton = (Button) findViewById(R.id.validate_button);

        mAddEditButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                ((com.mobsandgeeks.saripaar.Validator) mAddEditValidator).validate();
            }
        });
        mAddEditValidator = new Validator(this);
        mAddEditValidator.setValidationListener(this);

    }

    @Override
    public void onFailure(View failedView, Rule<?> failedRule) {

        String message = failedRule.getFailureMessage();
        if (failedView instanceof EditText) {
            Toast.makeText(this, message,
                    Toast.LENGTH_SHORT).show();
        }  else {
            Toast.makeText(this, "Record Not Saved", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public void onSuccess() {
        Toast.makeText(this, "Record Saved Successfully", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onValidationCancelled() {
    }

    @Override
    public void preValidation() {
    }
}

Output: 

Source Code :  Download Example with Library

Alert Dialog : Dialog with Item List Example in Android

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <Button
        android:id="@+id/done_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="DONE" />

</RelativeLayout>

MainActivity.java

package com.example.alertdialogex;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener {

    private Button mDoneButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mDoneButton = (Button) findViewById(R.id.done_button);
        mDoneButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {

        final CharSequence[] items = {
                "Rajesh", "Mahesh", "Vijayakumar"
        };

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Make your selection");
        builder.setItems(items, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) {
                // Do something with the selection
                mDoneButton.setText(items[item]);
            }
        });
        AlertDialog alert = builder.create();
        alert.show();

    }
}

 Output :

 

Source Code : Download this Example Here

Action Bar Sherlock : Action Bar with Custom Title View Example in Android

 

Add ActionBarSherlock Library Project to your Application Project, Here is a Link for this

http://rajeshvijayakumar.blogspot.in/2013/01/how-to-add-actionbarsherlock-library-to.html

activity_main.xml

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world" />

</RelativeLayout>

custom_action_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#86898a"
    android:gravity="center_vertical" >

    <TextView
        android:id="@+id/title_text"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:text="My Title"
        android:textColor="#ffffff"
        android:textSize="20sp"
        android:textStyle="bold" />

</RelativeLayout>

MainActivity.java

package com.rajeshvijayakumar.customtitle;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.SherlockActivity;

public class MainActivity extends SherlockActivity {

    // Action bar
    private ActionBar mActionBar;
    private LayoutInflater mInflater;
    private View mCustomView;
    private TextView mTitleTextView;

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

    private void initActionBar() {
        mActionBar = getSupportActionBar();
        mActionBar.setDisplayShowHomeEnabled(false);
        mActionBar.setDisplayShowTitleEnabled(false);
        mInflater = LayoutInflater.from(this);
        mCustomView = mInflater.inflate(R.layout.custom_action_layout, null);
        mTitleTextView = (TextView) mCustomView.findViewById(R.id.title_text);
        mTitleTextView.setText("My Own Title");
        mActionBar.setCustomView(mCustomView);
        mActionBar.setDisplayShowCustomEnabled(true);
        // mActionBar.setBackgroundDrawable(getResources().getDrawable(R.drawable.at_header_bg));
    }
}

Output :

  

Source Code : Download this Example Here

Xml Pull Parser Example in Android

rss_feed_view.xml

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

    <ListView
        android:id="@+id/rss_list_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</RelativeLayout>

rss_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/rss_title_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="17dp"
        android:layout_marginTop="14dp"
        android:text="NDTV"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="@android:color/black" />

</RelativeLayout>

RSSFeed.java

public class RSSFeed implements Serializable {

    private String title;
    private String link;
    private String description;
    private String category;
    private String pubDate;
    private String guid;
    private String feedburnerOrigLink;

    public RSSFeed() {
    }

    public RSSFeed(String title, String link, String description, String category, String pubDate,
            String guid, String feedburnerOrigLink) {
        this.title = title;
        this.link = link;
        this.description = description;
        this.category = category;
        this.pubDate = pubDate;
        this.guid = guid;
        this.feedburnerOrigLink = feedburnerOrigLink;
    }

    public String getTitle() {
        return title;
    }

    public String getLink() {
        return link;
    }

    public String getDescription() {
        return description;
    }

    public String getCategory() {
        return category;
    }

    public String getPubDate() {
        return pubDate;
    }

    public String getGuid() {
        return guid;
    }

    public String getFeedburnerOrigLink() {
        return feedburnerOrigLink;
    }


    public void setTitle(String title) {
        this.title = title;
    }

    public void setLink(String link) {
        this.link = link;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public void setPubDate(String pubDate) {
        this.pubDate = pubDate;
    }

    public void setGuid(String guid) {
        this.guid = guid;
    }

    public void setFeedburnerOrigLink(String feedburnerOrigLink) {
        this.feedburnerOrigLink = feedburnerOrigLink;
    }
}

NewsFeedParser.java

import com.rajeshvijayakumar.model.RSSFeed;

public class NewsFeedParser {
    private InputStream urlStream;
    private XmlPullParserFactory factory;
    private XmlPullParser parser;

    private List<RSSFeed> rssFeedList;
    private RSSFeed rssFeed;

    private String urlString;
    private String tagName;

    private String title;
    private String link;
    private String description;
    private String category;
    private String pubDate;
    private String guid;
    private String feedburner;

    public static final String ITEM = "item";
    public static final String CHANNEL = "channel";
   
    public static final String TITLE = "title";
    public static final String LINK = "link";
    public static final String DESCRIPTION = "description";
    public static final String CATEGORY = "category";
    public static final String PUBLISHEDDATE = "pubDate";
    public static final String GUID = "guid";
    public static final String FEEDBURNERORIGLINK = "feedburner:origLink";

   
    public NewsFeedParser(String urlString) {
        this.urlString = urlString;
    }

    public static InputStream downloadUrl(String urlString) throws IOException {
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        conn.connect();
        InputStream stream = conn.getInputStream();
        return stream;
    }
   
    public List<RSSFeed> parse() {
        try {
            int count = 0;
            factory = XmlPullParserFactory.newInstance();
            parser = factory.newPullParser();
            urlStream = downloadUrl(urlString);
            parser.setInput(urlStream, null);
            int eventType = parser.getEventType();
            boolean done = false;
            rssFeed = new RSSFeed();
            rssFeedList = new ArrayList<RSSFeed>();
            while (eventType != XmlPullParser.END_DOCUMENT && !done) {
                tagName = parser.getName();

                switch (eventType) {
                    case XmlPullParser.START_DOCUMENT:
                        break;
                    case XmlPullParser.START_TAG:
                        if (tagName.equals(ITEM)) {
                            rssFeed = new RSSFeed();
                        }
                        if (tagName.equals(TITLE)) {
                            title = parser.nextText().toString();
                        }
                        if (tagName.equals(LINK)) {
                            link = parser.nextText().toString();
                        }
                        if (tagName.equals(DESCRIPTION)) {
                            description = parser.nextText().toString();
                        }
                        if (tagName.equals(CATEGORY)) {
                            category = parser.nextText().toString();
                        }
                        if (tagName.equals(PUBLISHEDDATE)) {
                            pubDate = parser.nextText().toString();
                        }
                        if (tagName.equals(GUID)) {
                            guid = parser.nextText().toString();
                        }
                        if (tagName.equals(FEEDBURNERORIGLINK)) {
                            feedburner = parser.nextText().toString();
                        }
                        break;
                    case XmlPullParser.END_TAG:
                        if (tagName.equals(CHANNEL)) {
                            done = true;
                        } else if (tagName.equals(ITEM)) {
                            rssFeed = new RSSFeed(title, link, description, category, pubDate,                               guid,  feedburner);
                            rssFeedList.add(rssFeed);
                        }
                        break;
                }
                eventType = parser.next();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return rssFeedList;
    }
}

MainActivity.java

package com.rajeshvijayakumar.xmlpullparser;

import com.rajeshvijayakumar.model.RSSFeed;
import com.rajeshvijayakumar.parser.NewsFeedParser;

public class MainActivity extends Activity implements OnItemClickListener {

    private ListView mRssListView;
    private NewsFeedParser mNewsFeeder;
    private List<RSSFeed> mRssFeedList;
    private RssAdapter mRssAdap;

    private static final String TOPSTORIES =
            "http://feeds.feedburner.com/NdtvNews-TopStories?format=xml";

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

        mRssListView = (ListView) findViewById(R.id.rss_list_view);
        mRssFeedList = new ArrayList<RSSFeed>();
        new DoRssFeedTask().execute(TOPSTORIES);
        mRssListView.setOnItemClickListener(this);
    }

    private class RssAdapter extends ArrayAdapter<RSSFeed> {
        private List<RSSFeed> rssFeedLst;

        public RssAdapter(Context context, int textViewResourceId, List<RSSFeed> rssFeedLst) {
            super(context, textViewResourceId, rssFeedLst);
            this.rssFeedLst = rssFeedLst;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            View view = convertView;
            RssHolder rssHolder = null;
            if (convertView == null) {
                view = View.inflate(MainActivity.this, R.layout.rss_list_item, null);
                rssHolder = new RssHolder();
                rssHolder.rssTitleView = (TextView) view.findViewById(R.id.rss_title_view);
                view.setTag(rssHolder);
            } else {
                rssHolder = (RssHolder) view.getTag();
            }
            RSSFeed rssFeed = rssFeedLst.get(position);
            rssHolder.rssTitleView.setText(rssFeed.getTitle());
            return view;
        }
    }

    static class RssHolder {
        public TextView rssTitleView;
    }

    public class DoRssFeedTask extends AsyncTask<String, Void, List<RSSFeed>> {
        ProgressDialog prog;
        String jsonStr = null;
        Handler innerHandler;

        @Override
        protected void onPreExecute() {
            prog = new ProgressDialog(MainActivity.this);
            prog.setMessage("Loading....");
            prog.show();
        }

        @Override
        protected List<RSSFeed> doInBackground(String... params) {
            for (String urlVal : params) {
                mNewsFeeder = new NewsFeedParser(urlVal);
            }
            mRssFeedList = mNewsFeeder.parse();
            return mRssFeedList;
        }

        @Override
        protected void onPostExecute(List<RSSFeed> result) {
            prog.dismiss();
            runOnUiThread(new Runnable() {

                @Override
                public void run() {
                    mRssAdap = new RssAdapter(MainActivity.this, R.layout.rss_list_item,
                            mRssFeedList);
                    int count = mRssAdap.getCount();
                    if (count != 0 && mRssAdap != null) {
                        mRssListView.setAdapter(mRssAdap);
                    }
                }
            });
        }

        @Override
        protected void onProgressUpdate(Void... values) {
        }
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View v, int position, long id) {
    }
}
 Add this Permission in your Manifest.xml file of your project

   <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    

 Output :

Source Code : Download this Example Here

Alert Dialog Example in Android

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/alert_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show ALert" />
           
</LinearLayout>

AlertDialogActivity.java

package com.rajeshvijayakumar.alertdialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class AlertDialogActivity extends Activity {
    private Button MButton;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mButton = (Button) findViewById(R.id.alert_button);

        mButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(               AlertDialogActivity.this);
                alertDialogBuilder.setTitle("Close");
                alertDialogBuilder
                        .setMessage("Click Ok to Close Application")
                        .setCancelable(false)
                        .setPositiveButton("Ok",
                                new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog,
                                            int id) {
                                        finish();
                                    }
                                })
                        .setNegativeButton("Cancel",
                                new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog,
                                            int id) {
                                        dialog.cancel();
                                    }
                                });
                AlertDialog alertDialog = alertDialogBuilder.create();
                alertDialog.show();
            }
        });
    }
}

Output :

Source Code : Download this Example Here

Alternative to Custom Adapter : Instant Adapter Example in Android

Get Instant Adapter Library from the following Url : https://github.com/ragunathjawahar/instant-adapter

Import and Add Instant library Project to your Project as shown below :

 

Then use the following code :

In activity_main.xml

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

    <ListView
        android:id="@+id/person_list_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</RelativeLayout>

In list_item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="14dp"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/phone_no"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@id/name"
        android:layout_marginLeft="47dp"
        android:layout_toRightOf="@id/name"
        android:text="Small Text"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/email"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@id/phone_no"
        android:layout_below="@id/name"
        android:text="Small Text"
        android:textAppearance="?android:attr/textAppearanceSmall" />

</RelativeLayout>

Create Person.java Model

package com.rajeshvijayakumar.model;

import com.mobsandgeeks.adapters.InstantText;
import com.rajeshvijayakumar.insta.R;

public class Person {

    private String name;
    private String phoneNo;
    private String emailId;

    public Person(String name, String phoneNo, String emailId) {
        this.name = name;
        this.phoneNo = phoneNo;
        this.emailId = emailId;
    }

    @InstantText(viewId = R.id.name)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @InstantText(viewId = R.id.phone_no, formatString = "Mob : %s")
    public String getPhoneNo() {
        return phoneNo;
    }

    public void setPhoneNo(String phoneNo) {
        this.phoneNo = phoneNo;
    }

    @InstantText(viewId = R.id.email, formatString = "Email : %s")
    public String getEmailId() {
        return emailId;
    }

    public void setEmailId(String emailId) {
        this.emailId = emailId;
    }
}

MainActivity.java

package com.rajeshvijayakumar.insta;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

import com.mobsandgeeks.adapters.InstantAdapter;
import com.rajeshvijayakumar.model.Person;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends Activity {

    private ListView mPersonListView;
    private InstantAdapter mInsAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mPersonListView = (ListView) findViewById(R.id.person_list_view);
        mInsAdapter = new InstantAdapter<Person>(this, R.layout.list_item, Person.class, getPersons());
        mPersonListView.setAdapter(mInsAdapter);
    }

    private List<Person> getPersons() {

        List<Person> persons = new ArrayList<Person>();
        persons.add(new Person("Rajesh", "9600272370", "rajesh@gmail.com"));
        persons.add(new Person("Kuberan", "3224231223", "kuberan@gmail.com"));
        persons.add(new Person("Ramanan", "9873272323", "ramanan@gmail.com"));
        persons.add(new Person("Kalidasan", "9723476322", "kali@gmail.com"));

        return persons;
    }
}

Output :

Source Code :  Download this example here

Location Manager: Getting User Current Location using GPS Example in Android

main.xml

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/gps_text"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
</LinearLayout>

CurrentLocationActivity.java

package com.rajeshvijayakumar.gps;

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

import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class CurrentLocationActivity extends Activity {

    /** Called when the activity is first created. */

    private TextView gpsLocationView;
    private List<Address> addresses;
    private    String text;
    @Override

    public void onCreate(Bundle savedInstanceState)    {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);
    gpsLocationView=(TextView) findViewById(R.id.gps_text);
    /* Use the LocationManager class to obtain GPS locations */
    LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    LocationListener mlocListener = new MyLocationListener();
    mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
    }

    /* Class My Location Listener */
    public class MyLocationListener implements LocationListener    {

        @Override
        public void onLocationChanged(Location loc){
            loc.getLatitude();
            loc.getLongitude();
            Geocoder gcd = new Geocoder(getApplicationContext(), Locale.getDefault());
             try {
                addresses = gcd.getFromLocation(loc.getLatitude(),loc.getLongitude(), 1);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            String text=(addresses!=null)?"City : "+addresses.get(0).getSubLocality()+"\n Country : "+addresses.get(0).getCountryName():"Unknown Location";

            String locationValue = "My current location is: "+ text;
            gpsLocationView.setText(locationValue);
        }

        @Override
        public void onProviderDisabled(String provider){
            Toast.makeText( getApplicationContext(),"Gps Disabled",Toast.LENGTH_SHORT ).show();
        }

        @Override
        public void onProviderEnabled(String provider){
            Toast.makeText( getApplicationContext(),"Gps Enabled",Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras){
            }
    }
}


Source code :  Download this example