GCM in Android

Today I am going to share very Important code for GCM(Google Cloud Messaging) for Android. I worked with  php  for back end .
My article have 3 category-

1)Creating a Google API Project
2)PHP Back-end
3)Android Front-end

                                                         Part-A  Google API Project

1)Open Google API console from here
2)If you have not created any project create new project for your application-

3)See your browser URL and note your project ID from above some thing like that-1080127563513

https://code.google.com/apis/console/#project:1080127563513

4)In the main Google APIs Console page, select Services.

5)Turn the Google Cloud Messaging toggle to ON.

6)In the Terms of Service page, accept the terms.

7)get API Key from main Google APIs Console page, select API Access. You will see a screen that resembles the following and click on Create new Server Key:

8)Now from below window choose create button:

9)From below window note your project id and api key:

Part-B PHP Back-end Side

Just copy below file and put into your  php server inside ws folder-

1)GCM.php

'HI Sunil');
$url='https://android.googleapis.com/gcm/send';
$fields=array
 (
  'registration_ids'=>$registatoin_ids,
  'data'=>$msg
 );
$headers=array
 (
  'Authorization: key=AIzaSyA46UE7bBWXCpHSD5sbNxbRwI1MAKVI-jg',
  'Content-Type: application/json'
 );
$ch=curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST,true);
curl_setopt($ch,CURLOPT_HTTPHEADER,$headers);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch,CURLOPT_POSTFIELDS,json_encode($fields));
$result=curl_exec($ch);
curl_close($ch);
echo $result;
?>

Part-C Android side

1)MainActivity.java

package com.sunil.gcm.push;
 
import static com.sunil.gcm.push.CommonUtilities.SENDER_ID;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
 
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
 
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
 
import com.google.android.gcm.GCMRegistrar;
 
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public class MainActivity extends Activity {
 
    private String TAG = "** GCMPushDEMOAndroid**";
    private TextView mDisplay;
    String regId = "";
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        checkNotNull(SENDER_ID, "SENDER_ID");
        GCMRegistrar.checkDevice(this);
        GCMRegistrar.checkManifest(this);
 
        mDisplay = (TextView) findViewById(R.id.textView1);
 
        regId = GCMRegistrar.getRegistrationId(this);
 
        if (regId.equals("")) {
            GCMRegistrar.register(this, SENDER_ID);
        } else {
            Log.v(TAG, "Already registered");
        }
        /**
         * call asYnc Task
         */
        new sendIdOnOverServer().execute();
        mDisplay.setText("RegId=" + regId);
    }
 
    private void checkNotNull(Object reference, String name) {
        if (reference == null) {
            throw new NullPointerException(getString(R.string.error_config,
                    name));
        }
 
    }
 
    @Override
    protected void onPause() {
        super.onPause();
        GCMRegistrar.unregister(this);
    }
 
    public class sendIdOnOverServer extends AsyncTask {
 
        ProgressDialog pd = null;
 
        @Override
        protected void onPreExecute() {
            pd = ProgressDialog.show(MainActivity.this, "Please wait",
                    "Loading please wait..", true);
            pd.setCancelable(true);
 
        }
 
        @Override
        protected String doInBackground(String... params) {
            try {
                HttpResponse response = null;
                HttpParams httpParameters = new BasicHttpParams();
                HttpClient client = new DefaultHttpClient(httpParameters);
                String url = "http://10.0.0.30//parsing/GCM.php?" + "�ID="
                        + regId;
                Log.i("Send URL:", url);
                HttpGet request = new HttpGet(url);
 
                response = client.execute(request);
 
                BufferedReader rd = new BufferedReader(new InputStreamReader(
                        response.getEntity().getContent()));
 
                String webServiceInfo = "";
                while ((webServiceInfo = rd.readLine()) != null) {
                    Log.d("****Status Log***", "Webservice: " + webServiceInfo);
 
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
 
        }
 
        @Override
        protected void onPostExecute(String result) {
            pd.dismiss();
 
        }
 
    }
 
}

2)GCMIntentService.java

package com.sunil.gcm.push;
 
import static com.sunil.gcm.push.CommonUtilities.SENDER_ID;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
 
import com.google.android.gcm.GCMBaseIntentService;
 
public class GCMIntentService extends GCMBaseIntentService {
 
    public GCMIntentService() {
        super(SENDER_ID);
    }
 
    private static final String TAG = "===GCMIntentService===";
 
    @Override
    protected void onRegistered(Context arg0, String registrationId) {
        Log.i(TAG, "Device registered: regId = " + registrationId);
    }
 
    @Override
    protected void onUnregistered(Context arg0, String arg1) {
        Log.i(TAG, "unregistered = " + arg1);
    }
 
    @Override
    protected void onMessage(Context context, Intent intent) {
        Log.i(TAG, "new message= ");
        String message = intent.getExtras().getString("message");
        generateNotification(context, message);
    }
 
    @Override
    protected void onError(Context arg0, String errorId) {
        Log.i(TAG, "Received error: " + errorId);
    }
 
    @Override
    protected boolean onRecoverableError(Context context, String errorId) {
        return super.onRecoverableError(context, errorId);
    }
 
    /**
     * Issues a notification to inform the user that server has sent a message.
     */
    private static void generateNotification(Context context, String message) {
        int icon = R.drawable.ic_launcher;
        long when = System.currentTimeMillis();
        NotificationManager notificationManager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(icon, message, when);
        String title = context.getString(R.string.app_name);
        Intent notificationIntent = new Intent(context, MainActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
                | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent = PendingIntent.getActivity(context, 0,
                notificationIntent, 0);
        notification.setLatestEventInfo(context, title, message, intent);
        notification.flags |= Notification.FLAG_AUTO_CANCEL;
        notificationManager.notify(0, notification);
    }
}

3)CommonUtilities .java

package com.sunil.gcm.push;
 
public final class CommonUtilities {
//put here your sender Id
static final String SENDER_ID = "311451115764";
 
}

4)activity_main.xml

5)manifest.xml