Drawing location polyline using Google Directions in Google Map Android API V2,

activity_main.xml


<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" ></FrameLayout>

</RelativeLayout>


MainActivity:





import java.util.ArrayList;

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

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
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 {



GoogleMap googleMap;
ArrayList<LatLng> points;


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

points = new ArrayList<LatLng>();


// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

// Getting GoogleMap object from the fragment
googleMap = fm.getMap();

// Enabling MyLocation Layer of Google Map
googleMap.setMyLocationEnabled(true);


// Setting OnClick event listener for the Google Map
googleMap.setOnMapClickListener(new OnMapClickListener() {

@Override
public void onMapClick(LatLng point) {

// Instantiating the class MarkerOptions to plot marker on the map
MarkerOptions markerOptions = new MarkerOptions();

// Setting latitude and longitude of the marker position
markerOptions.position(point);

// Setting titile of the infowindow of the marker
markerOptions.title("Position");

// Setting the content of the infowindow of the marker
markerOptions.snippet("Latitude:"+point.latitude+","+"Longitude:"+point.longitude);



// Instantiating the class PolylineOptions to plot polyline in the map
PolylineOptions polylineOptions = new PolylineOptions();

// Setting the color of the polyline
polylineOptions.color(Color.RED);

// Setting the width of the polyline
polylineOptions.width(3);

// Adding the taped point to the ArrayList
points.add(point);

// Setting points of polyline
polylineOptions.addAll(points);

// Adding the polyline to the map
googleMap.addPolyline(polylineOptions);

// Adding the marker to the map
googleMap.addMarker(markerOptions);

}
});

googleMap.setOnMapLongClickListener(new OnMapLongClickListener() {

@Override
public void onMapLongClick(LatLng point) {
// Clearing the markers and polylines in the google map
googleMap.clear();

// Empty the array list
points.clear();
}
});

}


@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;
}

}


manifest.xml



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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
   
    <permission
          android:name="in.wptrafficanalyzer.locationpolyline.permission.MAPS_RECEIVE"
          android:protectionLevel="signature"/>
   
    <uses-permission android:name="in.wptrafficanalyzer.locationpolyline.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.locationpolyline.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="AIzaSyDNdFhV5-CKWMiUH7gH1xX8fkQjrZdRdBA"/>
       
       
     
    </application>

</manifest>