Draw Route on MapV2

Create class GMapV2Direction.java

package com.exampledrawrouteonmap.act;

import java.io.InputStream;
import java.util.ArrayList;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.util.Log;

import com.google.android.gms.maps.model.LatLng;


public class GMapV2Direction {

public final static String MODE_DRIVING = "driving";
public final static String MODE_WALKING = "walking";

public GMapV2Direction() { }

public Document getDocument(LatLng start, LatLng end, String mode) {

//Implement THREADING concept here  ###

String url = "http://maps.googleapis.com/maps/api/directions/xml?"
+ "origin=" + start.latitude + "," + start.longitude
+ "&destination=" + end.latitude + "," + end.longitude
+ "&sensor=false&units=metric&mode=driving";

try {
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(url);
HttpResponse response = httpClient.execute(httpPost, localContext);

InputStream in = response.getEntity().getContent();
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(in);
return doc;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

public String getDurationText (Document doc) {
NodeList nl1 = doc.getElementsByTagName("duration");
       Node node1 = nl1.item(0);
       NodeList nl2 = node1.getChildNodes();
       Node node2 = nl2.item(getNodeIndex(nl2, "text"));
       Log.i("DurationText", node2.getTextContent());
return node2.getTextContent();
}

public int getDurationValue (Document doc) {
NodeList nl1 = doc.getElementsByTagName("duration");
       Node node1 = nl1.item(0);
       NodeList nl2 = node1.getChildNodes();
       Node node2 = nl2.item(getNodeIndex(nl2, "value"));
       Log.i("DurationValue", node2.getTextContent());
return Integer.parseInt(node2.getTextContent());
}

public String getDistanceText (Document doc) {
NodeList nl1 = doc.getElementsByTagName("distance");
       Node node1 = nl1.item(0);
       NodeList nl2 = node1.getChildNodes();
       Node node2 = nl2.item(getNodeIndex(nl2, "text"));
       Log.i("DistanceText", node2.getTextContent());
return node2.getTextContent();
}

public int getDistanceValue (Document doc) {
NodeList nl1 = doc.getElementsByTagName("distance");
       Node node1 = nl1.item(0);
       NodeList nl2 = node1.getChildNodes();
       Node node2 = nl2.item(getNodeIndex(nl2, "value"));
       Log.i("DistanceValue", node2.getTextContent());
return Integer.parseInt(node2.getTextContent());
}


public String getStartAddress (Document doc) {
NodeList nl1 = doc.getElementsByTagName("start_address");
       Node node1 = nl1.item(0);
       Log.i("StartAddress", node1.getTextContent());
return node1.getTextContent();
}

public String getEndAddress (Document doc) {
NodeList nl1 = doc.getElementsByTagName("end_address");
       Node node1 = nl1.item(0);
       Log.i("StartAddress", node1.getTextContent());
return node1.getTextContent();
}

public String getCopyRights (Document doc) {
NodeList nl1 = doc.getElementsByTagName("copyrights");
       Node node1 = nl1.item(0);
       Log.i("CopyRights", node1.getTextContent());
return node1.getTextContent();
}

public ArrayList<LatLng> getDirection (Document doc) {
NodeList nl1, nl2, nl3;
       ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>();
       nl1 = doc.getElementsByTagName("step");   
       if (nl1.getLength() > 0) {
           for (int i = 0; i < nl1.getLength(); i++) {
               Node node1 = nl1.item(i);
               nl2 = node1.getChildNodes();

               Node locationNode = nl2.item(getNodeIndex(nl2, "start_location"));
               nl3 = locationNode.getChildNodes();
               Node latNode = nl3.item(getNodeIndex(nl3, "lat"));
               double lat = Double.parseDouble(latNode.getTextContent());
               Node lngNode = nl3.item(getNodeIndex(nl3, "lng"));
               double lng = Double.parseDouble(lngNode.getTextContent());
               listGeopoints.add(new LatLng(lat, lng));

               locationNode = nl2.item(getNodeIndex(nl2, "polyline"));
               nl3 = locationNode.getChildNodes();
               latNode = nl3.item(getNodeIndex(nl3, "points"));
               ArrayList<LatLng> arr = decodePoly(latNode.getTextContent());
               for(int j = 0 ; j < arr.size() ; j++) {
               listGeopoints.add(new LatLng(arr.get(j).latitude, arr.get(j).longitude));
               }

               locationNode = nl2.item(getNodeIndex(nl2, "end_location"));
               nl3 = locationNode.getChildNodes();
               latNode = nl3.item(getNodeIndex(nl3, "lat"));
               lat = Double.parseDouble(latNode.getTextContent());
               lngNode = nl3.item(getNodeIndex(nl3, "lng"));
               lng = Double.parseDouble(lngNode.getTextContent());
               listGeopoints.add(new LatLng(lat, lng));
           }
       }
    
       return listGeopoints;
}

private int getNodeIndex(NodeList nl, String nodename) {
for(int i = 0 ; i < nl.getLength() ; i++) {
if(nl.item(i).getNodeName().equals(nodename))
return i;
}
return -1;
}

private ArrayList<LatLng> decodePoly(String encoded) {
ArrayList<LatLng> poly = new ArrayList<LatLng>();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;
while (index < len) {
int b, shift = 0, result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lng += dlng;

LatLng position = new LatLng((double) lat / 1E5, (double) lng / 1E5);
poly.add(position);
}
return poly;
}

}


then this is the MainActivity.java

package com.exampledrawrouteonmap.act;

import java.util.ArrayList;

import org.w3c.dom.Document;

import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

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;
import com.google.android.gms.maps.model.PolylineOptions;

public class MainActivity extends FragmentActivity {

private static final String TAG ="MainActivity";
GoogleMap mMap;
GMapV2Direction md;

/*LatLng fromPosition = new LatLng(12.914788 , 77.610106);
LatLng toPosition = new LatLng(12.94231 , 77.59739); */

LatLng fromPosition = new LatLng(23.037446,72.566325);
LatLng toPosition = new LatLng(23.054590 , 72.519743); 

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

md = new GMapV2Direction();
mMap = ((SupportMapFragment)getSupportFragmentManager()
.findFragmentById(R.id.the_map)).getMap();

// LatLng coordinates = new LatLng(12.914788 , 77.610106);
LatLng coordinates = new LatLng(23.037446,72.566325);

mMap.setMyLocationEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.getUiSettings().setCompassEnabled(true);
mMap.getUiSettings().setMyLocationButtonEnabled(true);
mMap.getUiSettings().setAllGesturesEnabled(true);
mMap.setTrafficEnabled(true);
mMap.animateCamera(CameraUpdateFactory.zoomTo(12));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinates, 16));

mMap.addMarker(new MarkerOptions().position(fromPosition).title("Start"));
mMap.addMarker(new MarkerOptions().position(toPosition).title("End"));

new showRoute().execute();
}

@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;
}

private class showRoute extends AsyncTask<Void, Void, Document>{

Document doc;
PolylineOptions rectLine;

@Override
protected Document doInBackground(Void... params) {

doc = md.getDocument(fromPosition, toPosition, GMapV2Direction.MODE_DRIVING);

ArrayList<LatLng> directionPoint = md.getDirection(doc);
rectLine = new PolylineOptions().width(3).color(Color.RED);

for(int i = 0 ; i < directionPoint.size() ; i++) {
           rectLine.add(directionPoint.get(i));
}

return null;
}

@Override
protected void onPostExecute(Document result) {

mMap.addPolyline(rectLine);
}

}

}

And last here is my manifest.xml file

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />
    
    <permission android:name="com.prabhakar.permission.MAPS_RECEIVE"
         android:protectionLevel="signature"/>

    <uses-permission android:name="com.prabhakar.permission.MAPS_RECEIVE" />    
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <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=".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>
        
       <!-- to get this API go to https://code.google.com/apis/console/ 
       and create api for this pacakge from SHA1 key
       Release key :- AIzaSyAATtJF2N3Hk5o_-QkDfq9sfi10sau4_Ys
        Debug key :- AIzaSyAfxRwKM9g3TnOk6rsJtAvO8qdz6bqY2z4
        --> 
           <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyAfxRwKM9g3TnOk6rsJtAvO8qdz6bqY2z4" />
             <meta-data android:name="com.google.android.gms.version" 
            android:value="@integer/google_play_services_version" />
    </application>


</manifest>

Use Third party API in Android

Create class MySSLSocketFactory.java

package com.example.authdemo;

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.conn.ssl.SSLSocketFactory;

public class MySSLSocketFactory extends SSLSocketFactory{
    SSLContext sslContext = SSLContext.getInstance("TLS");

    /**
     * @param truststore
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     * @throws KeyStoreException
     * @throws UnrecoverableKeyException
     */
    public MySSLSocketFactory(KeyStore truststore) throws NoSuchAlgorithmException,
            KeyManagementException, KeyStoreException, UnrecoverableKeyException {
        super(truststore);

        TrustManager tm = new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
            }

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };

        sslContext.init(null, new TrustManager[] {
            tm
        }, null);
    }

    @Override
    public Socket createSocket(Socket socket, String host, int port, boolean autoClose)
            throws IOException, UnknownHostException {
        return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
    }

    @Override
    public Socket createSocket() throws IOException {
        return sslContext.getSocketFactory().createSocket();
    }

}

and MainActivity.java

package com.example.authdemo;

import java.security.KeyStore;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.HttpVersion;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.client.methods.HttpUriRequest;

import org.apache.http.conn.ClientConnectionManager;

import org.apache.http.conn.scheme.PlainSocketFactory;

import org.apache.http.conn.scheme.Scheme;

import org.apache.http.conn.scheme.SchemeRegistry;

import org.apache.http.conn.ssl.SSLSocketFactory;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;

import org.apache.http.params.BasicHttpParams;

import org.apache.http.params.HttpParams;

import org.apache.http.params.HttpProtocolParams;

import org.apache.http.protocol.HTTP;

import org.apache.http.util.EntityUtils;

import android.app.Activity;

import android.os.Bundle;

import android.util.Base64;

import android.util.Log;

import android.widget.TextView;

public class MainActivity extends Activity {

TextView txt;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

txt = (TextView)findViewById(R.id.txt);

new Thread(new Runnable() {

@Override

public void run() {

String responseBody = getData("your thirdparty url");

if(responseBody != null){

// Log.e("responseBody", responseBody);

Log.i("MainActi","Response....."+responseBody);

}

}

}).start();

}

public String getData(String url) {

String responseBody = null;

HttpUriRequest request = new HttpGet(url); // Or HttpPost(), depends on your needs  

String credentials = "username:password";

String base64EncodedCredentials = Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);  

request.addHeader("Authorization", "Basic " + base64EncodedCredentials);

HttpClient httpclient = getNewHttpClient();  

try {

HttpResponse httpResponse = httpclient.execute(request);

int code = httpResponse.getStatusLine().getStatusCode();

Log.e("responseCode ", String.valueOf(code));

if(code ==  HttpStatus.SC_OK){

responseBody = EntityUtils.toString(httpResponse.getEntity());

}

} catch (Exception e) {

e.printStackTrace();

}

return responseBody; 

}

/****

     * HTTPS

     * 

     * @return DefaultHttpClient

     */

    public static DefaultHttpClient getNewHttpClient() {

        try {

            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());

            trustStore.load(null, null);

            SSLSocketFactory sf = new MySSLSocketFactory(trustStore);

            sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

            HttpParams params = new BasicHttpParams();

            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);

            HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);

            SchemeRegistry registry = new SchemeRegistry();

            registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));

            registry.register(new Scheme("https", sf, 443));

            ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);

            return new DefaultHttpClient(ccm, params);

        } catch (Exception e) {

            return new DefaultHttpClient();

        }

    }

}

JSON Parsing Example

Create JSONParser.java class for parsing api url

package com.examplejsonparsing.act;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
  static InputStream is = null;
  static JSONObject jObj = null;
  static String json = "";
  // constructor
  public JSONParser() {
  }
  public JSONObject getJSONFromUrl(String url) {
    // Making HTTP request
    try {
      // defaultHttpClient
      DefaultHttpClient httpClient = new DefaultHttpClient();
      HttpPost httpPost = new HttpPost(url);
      HttpResponse httpResponse = httpClient.execute(httpPost);
      HttpEntity httpEntity = httpResponse.getEntity();
      is = httpEntity.getContent();
    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    } catch (ClientProtocolException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
    try {
      BufferedReader reader = new BufferedReader(new InputStreamReader(
          is, "iso-8859-1"), 8);
      StringBuilder sb = new StringBuilder();
      String line = null;
      while ((line = reader.readLine()) != null) {
        sb.append(line + "n");
      }
      is.close();
      json = sb.toString();
    } catch (Exception e) {
      Log.e("Buffer Error", "Error converting result " + e.toString());
    }
    // try parse the string to a JSON object
    try {
      jObj = new JSONObject(json);
    } catch (JSONException e) {
      Log.e("JSON Parser", "Error parsing data " + e.toString());
    }
    // return JSON String
    return jObj;
  }

}

then in main.xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    
    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/uid"
        android:textAppearance="?android:attr/textAppearanceLarge" />
    <TextView
        android:id="@+id/email"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/name"
        android:textAppearance="?android:attr/textAppearanceLarge" />
    <TextView
        android:id="@+id/uid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/name"
        android:layout_alignParentTop="true"
        android:layout_marginTop="76dp"
        android:textAppearance="?android:attr/textAppearanceLarge" />


</LinearLayout>

and last is MainActivity.java file

package com.examplejsonparsing.act;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

public class MainActivity extends Activity {

  //URL to get JSON Array

  private static String url = "http://10.0.2.2/JSON/";

  //JSON Node Names

  private static final String TAG_USER = "user";

  private static final String TAG_ID = "id";

  private static final String TAG_NAME = "name";

  private static final String TAG_EMAIL = "email";

  JSONArray user = null;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    // Creating new JSON Parser

    JSONParser jParser = new JSONParser();

    // Getting JSON from URL

    JSONObject json = jParser.getJSONFromUrl(url);

    try {

      // Getting JSON Array

      user = json.getJSONArray(TAG_USER);

      JSONObject c = user.getJSONObject(0);

      // Storing  JSON item in a Variable

      String id = c.getString(TAG_ID);

      String name = c.getString(TAG_NAME);

      String email = c.getString(TAG_EMAIL);

      

      //Importing TextView

      final TextView uid = (TextView)findViewById(R.id.uid);

      final TextView name1 = (TextView)findViewById(R.id.name);

      final TextView email1 = (TextView)findViewById(R.id.email);

      //Set JSON Data in TextView

      uid.setText(id);

      name1.setText(name);

      email1.setText(email);

  } catch (JSONException e) {

    e.printStackTrace();

  }

    }

}

and don't forget to give permission in manifest.xml file

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

Android Interface Use Example

How we can use interface in Android application.

create activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <EditText 
        android:id="@+id/edtname"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:hint="Enter name"/>
    <Button 
        android:id="@+id/btnadd"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="Add item"/>
    <ListView 
        android:id="@+id/lst"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:background="@android:color/black"></ListView>


</LinearLayout>

then create lstraw.xml for listview dynamic raw

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:orientation="vertical" >

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentRight="true"

        android:layout_centerVertical="true"

        android:text="Delete" />

    <TextView

        android:id="@+id/textView1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_toLeftOf="@+id/button1"

        android:layout_centerVertical="true"

        android:text="TextView" />

</RelativeLayout>

below is MainActivity.java

package com.exampleinterfaceexample.act;

import java.util.ArrayList;

import android.app.Activity;

import android.os.Bundle;

import android.text.TextUtils;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ListView;

public class MainActivity extends Activity{

ArrayList<String> myary;

ListView lst;

MyListAdapter mylstadp;

EditText edtname;

Button btnadd;

String strname;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

lst = (ListView)findViewById(R.id.lst);

edtname = (EditText)findViewById(R.id.edtname);

btnadd = (Button)findViewById(R.id.btnadd);

myary = new ArrayList<String>();

myary.add("Android");

myary.add("Iphone");

myary.add("Windows");

myary.add("Blackberry");

myary.add("Ipad");

mylstadp = new MyListAdapter(getApplicationContext(), myary);

lst.setAdapter(mylstadp);

mylstadp.setListeners(new MyInterface() {

@Override

public void rowDeleted(Integer pos) {

// TODO Auto-generated method stub

lst.removeViewAt(pos);

mylstadp.notifyDataSetChanged();

}

});

btnadd.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

strname = edtname.getText().toString();

if(!TextUtils.isEmpty(strname)){

myary.add(strname);

}

mylstadp.notifyDataSetChanged();

/*mylstadp = new MyListAdapter(getApplicationContext(), myary);

lst.setAdapter(mylstadp);*/

}

});

}

}

then create MyInterface.java class for interface

package com.exampleinterfaceexample.act;

public interface MyInterface {

   public abstract void rowDeleted(Integer pos);

}

then create listview adapter MyListAdapter.java

package com.exampleinterfaceexample.act;

import java.util.ArrayList;

import android.content.Context;

import android.content.Intent;

import android.text.TextUtils;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.TextView;

public class MyListAdapter extends BaseAdapter {

Context mContext;

LayoutInflater layoutinflator;

ArrayList<String> araylistatende;

MyInterface myinterface;

public MyListAdapter(Context context, ArrayList<String> list) {

this.araylistatende = list;

this.mContext = context;

this.layoutinflator = LayoutInflater.from(context);

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return araylistatende.size();

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return araylistatende.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(final int position, View view, ViewGroup parent) {

// TODO Auto-generated method stub

if (view == null) {

view = layoutinflator.inflate(R.layout.lstraw, null);

}

TextView txteventpasttype = (TextView) view.findViewById(R.id.textView1);

Button btn = (Button)view.findViewById(R.id.button1);

if(araylistatende.get(position) != null){

txteventpasttype.setText(araylistatende.get(position).toString());

}

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

araylistatende.remove(position);

notifyDataSetChanged();

}

});

return view;

}

// This is the interface method

public void setListeners(MyInterface  datasend)

{

myinterface = datasend;  

}

// This is the interface method

}

Now ,run the code.

This code is define the use of interface is android application.

Map V2 Example

create application and import google-play-services library.

create 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"

    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="com.diyamap.act.MainActivity" >

  <fragment 

          android:id="@+id/map"

          android:layout_width="match_parent"

          android:layout_height="fill_parent"

          android:name="com.google.android.gms.maps.SupportMapFragment"/>

</RelativeLayout>

and below is my menifest.xml file

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.examplemap.act"

    android:versionCode="1"

    android:versionName="1.0">

    <uses-sdk

        android:minSdkVersion="11"

        android:targetSdkVersion="19"/>

    <permission

        android:name="com.diyamap.act.permission.MAPS_RECEIVE"

        android:protectionLevel="signature"/>

    <uses-feature

        android:glEsVersion="0x00020000"

        android:required="true"/>

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

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

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

<!-- The following two permissions are not required to use

     Google Maps Android API v2, but are recommended. -->

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

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

<uses-permission android:name="com.diyamap.act.permission.MAPS_RECEIVE" />

<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme">

        <uses-library android:name="com.google.android.maps"/>

        <activity

            android:name=".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.gms.version"

            android:value="@integer/google_play_services_version" />

        <meta-data

            android:name="com.google.android.maps.v2.API_KEY"

            android:value="AIzaSyDg11tWv7QEaQOFxzdD44O-C3ts11jxW_s" />

            </application>

</manifest>

here is MainActivity.java

package com.examplemap.act;

import android.content.Context;

import android.graphics.drawable.Drawable;

import android.os.Bundle;

import android.support.v4.app.FragmentActivity;

import com.google.android.gms.maps.CameraUpdateFactory;

import com.google.android.gms.maps.GoogleMap;

import com.google.android.gms.maps.StreetViewPanorama;

import com.google.android.gms.maps.SupportMapFragment;

import com.google.android.gms.maps.model.BitmapDescriptorFactory;

import com.google.android.gms.maps.model.CameraPosition;

import com.google.android.gms.maps.model.GroundOverlayOptions;

import com.google.android.gms.maps.model.LatLng;

import com.google.android.gms.maps.model.Marker;

import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends FragmentActivity {

GoogleMap map;

Drawable drawable;

Context mContext;

protected String latitude, longitude;

protected boolean gps_enabled, network_enabled;

// Double lat,lon;

MarkerOptions marker;

String lat,lon;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

mContext = MainActivity.this;

Utility.registerLocationListener(mContext);

lat = Utility.getSharedKey("Latitude", mContext);

lon = Utility.getSharedKey("Longitude", mContext);

map.clear();

// Creating an instance of MarkerOptions

marker = new MarkerOptions();

LatLng latlng = new LatLng(Double.parseDouble(lat),

Double.parseDouble(lon));

marker = new MarkerOptions().position(latlng).title("Hello Maps").snippet("Population: 4,137,400");

// Draw  ground overlay 

/*GroundOverlayOptions newarkMap = new GroundOverlayOptions()

        .image(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE))

        .position(latlng, 8600f, 6500f);

map.addGroundOverlay(newarkMap);*/

// Custom Marker Icon

/*

* fromAsset(String assetName) – Loading from assets folder fromBitmap

* (Bitmap image) – Loading bitmap image fromFile (String path) –

* Loading from file fromResource (int resourceId) – Loading from

* drawable resource

*/

marker.icon(BitmapDescriptorFactory

.defaultMarker(BitmapDescriptorFactory.HUE_ROSE));

map.addMarker(marker);

CameraPosition cameraPosition = new CameraPosition.Builder()

.target(new LatLng(Double.parseDouble(lat), Double

.parseDouble(lon))).zoom(12).build();

map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

// Changing Map Type

map.setMapType(GoogleMap.MAP_TYPE_NORMAL);

// map.setMapType(GoogleMap.MAP_TYPE_HYBRID);

// map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);

// map.setMapType(GoogleMap.MAP_TYPE_TERRAIN);

// map.setMapType(GoogleMap.MAP_TYPE_NONE);

// Showing Current Location

map.setMyLocationEnabled(true); // false to disable

// Zooming Buttons

map.getUiSettings().setZoomControlsEnabled(true); // true to enable

// Zooming Functionality

map.getUiSettings().setZoomGesturesEnabled(true);

// Compass Functionality

map.getUiSettings().setCompassEnabled(true);

// My Location Button

map.getUiSettings().setMyLocationButtonEnabled(true);

// Map Rotate Gesture

map.getUiSettings().setRotateGesturesEnabled(true);

}

}

create Utility.java for common function define here

package com.examplemap.act;

import android.annotation.SuppressLint;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.SharedPreferences;

import android.location.Location;

import android.location.LocationManager;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

@SuppressLint("SimpleDateFormat")

public class Utility {

public static boolean isNetworkAvailable(Context context) {

ConnectivityManager manager = (ConnectivityManager) context

.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo info = manager.getActiveNetworkInfo();

return info != null;

}

public static void setSharedKey(String key, String value, Context context) {

SharedPreferences spre = context.getSharedPreferences(

context.getPackageName(), Context.MODE_PRIVATE);

SharedPreferences.Editor prefEditor = spre.edit();

prefEditor.putString(key, value);

//prefEditor.clear();

prefEditor.commit();

}

public static String getSharedKey(String key, Context context) {

SharedPreferences spre = context.getSharedPreferences(

context.getPackageName(), Context.MODE_PRIVATE);

return spre.getString(key, "");

}

public static AlertDialog myAlertDialog;

  public static void showDialogwithTitle(Context context,String message) {

         AlertDialog.Builder builder = new AlertDialog.Builder(context);

         //builder.setTitle(context.getResources().getString(R.string.app_name));

         builder.setMessage(message);

         builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {

                 public void onClick(DialogInterface dialog, int arg1) {

                     dialog.dismiss();

                 }});

         builder.setCancelable(false);

         myAlertDialog = builder.create();

         myAlertDialog.show();

 }

  

  

public static void registerLocationListener(Context context) {

LocationManager lManager = null;

CurrentLocListener cListener = null;

lManager = (LocationManager) context

.getSystemService(Context.LOCATION_SERVICE);

cListener = new CurrentLocListener(context);

boolean isGpsEnabled = false;

boolean isNetworkEnabled = false;

isGpsEnabled = lManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

isNetworkEnabled = lManager

.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

if (isGpsEnabled) {

lManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,

cListener);

Location location = lManager

.getLastKnownLocation(LocationManager.GPS_PROVIDER);

if (location != null) {

Utility.setSharedKey("Latitude",

String.valueOf(location.getLatitude()), context);

Utility.setSharedKey("Longitude",

String.valueOf(location.getLongitude()), context);

}

}

if (isNetworkEnabled) {

lManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,

0, 0, cListener);

Location location = lManager

.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

if (location != null) {

Utility.setSharedKey("Latitude",

String.valueOf(location.getLatitude()), context);

Utility.setSharedKey("Longitude",

String.valueOf(location.getLongitude()), context);

}

}

}

}

then create CurrentLocListener.java

package com.examplemap.act;

import android.content.Context;

import android.content.Intent;

import android.location.Location;

import android.location.LocationListener;

import android.os.Bundle;

import android.util.Log;

public class CurrentLocListener implements LocationListener {

private static final String TAG = "CurrentLocListener - ";

public static final String ACTION_LOCATION_CHANGED = "tixe.act.ACTION_LOCATION_CHANGED";

Context mContext;

String latitude,longitude,token;

public CurrentLocListener(Context context){

Log.i(TAG, TAG + "CurrentLocListener - ");

mContext = context;

}

@Override

public void onLocationChanged(Location location) {

Log.i(TAG, TAG + "onLocationChanged - Latitude: " + String.valueOf(location.getLatitude()) + " Longitude: " + String.valueOf(location.getLongitude()));

Utility.setSharedKey("Latitude", String.valueOf(location.getLatitude()), mContext);

Utility.setSharedKey("Longitude", String.valueOf(location.getLongitude()), mContext);

Intent mIntent = new Intent(ACTION_LOCATION_CHANGED);

mContext.sendBroadcast(mIntent);

}

@Override

public void onProviderDisabled(String provider) {

Log.i(TAG, TAG + "onProviderDisabled - ");

}

@Override

public void onProviderEnabled(String provider) {

Log.i(TAG, TAG + "onProviderEnabled - ");

}

@Override

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

Log.i(TAG, TAG + "onStatusChanged - ");

}

}

Now,

for get API key go to https://console.developers.google.com ,and create project over there , then in that project go to APIs & auth tab and Enable google maps android v2 and go to next Credential tab and there create Public API access ,and click on Create new key , and click on Android key  here we need SHA1 key

For getting SHA1 key open terminal and write below command

keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore -list -v

password : android

it will create SHA1 key

use that key in api console project for create Androidkey

put there SHA1key;yourandroidapppackagename

and click on create button it creates API key for map.

your code is ready to run.