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StartActivityForResult between 2 apps doesn't return any value to the first App

Let's say I have App A and App B.
In app A, I launch an intent to start App B in this way.
Intent intent = new Intent("com.example.myAppBAction");
Bundle bundle = new Bundle();
bundle.putString("anId", id);
intent.putExtras(bundle);
startActivityForResult(intent, myRequestCode);
Then in App B, I receive all my data and after doing some work I return a result this way.
#Override
public void onBackPressed() {
super.onBackPressed();
Intent i = new Intent();
int codeWorkDone;//this is valued between 2 or 3
i.putExtra("FirstResult", anInteger);
i.putExtra("SecondResult", anotherInteger);
setResult(codeWorkDone, i);
finish();
}
Eventually in my onActivityResult I need to print all the extras put in App B, as it follows:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode){
case myRequestCode:
StringBuilder result = new StringBuilder();
result.append(resultCode + "\n");
if (data != null){
Bundle b = data.getExtras();
if (b != null) {
for (String key : b.keySet()) {
result.append(key + " : " + (b.get(key) != null ? b.get(key) : "NULL"));
}
}
}
Log.d("esito", result.toString());
break;
}
}
The problem here is that the requestCode is correct, but I received back a resultCode which is 0 (remember that from app B is set between 2 or 3) and my data is null.
Any hint on this one?
EDIT:
App A Manifest :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.appA"
android:versionCode="202040"
android:versionName="2.2.4" >
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:name=".application.MyAppAApplication"
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar"
>
<activity
android:name=".activity.MainActivity"
android:configChanges="orientation|screenSize"
android:theme="#style/AppTheme.NoActionBar"
android:launchMode="singleTask"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.TestActivityToLaunchAppB"
android:label="#string/title_activity"
android:theme="#style/AppTheme.NoActionBar"
android:windowSoftInputMode="stateHidden|adjustPan" >
</activity>
<meta-data
android:name="io.fabric.ApiKey"
android:value="xxx" />
</application>
</manifest>
App B Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.myApp.appB">
<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="android.permission.READ_EXTERNAL_STORAGE" />
<uses-feature
android:name="android.hardware.camera"
android:required="true" />
<application
android:name=".MyAppApplication"
android:allowBackup="false"
android:hardwareAccelerated="true"
android:icon="#drawable/xxhdpi"
android:label="#string/app_name"
android:largeHeap="true"
android:roundIcon="#drawable/xxhdpi"
android:supportsRtl="true"
android:theme="#style/AppTheme"
tools:ignore="GoogleAppIndexingWarning">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.cdd.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
<activity
android:name=".activity.MyLandingActivity"
android:configChanges="orientation|screenSize"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="com.example.myAppBAction" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>

Android BroadcastReceiver not detecting SMS

I don't know what has gone wrong, but I'm having a difficult time with this one. The program is supposed to show a toast once a message is received. I have tried adding the priority in the manifest file, but it doesn't work.
The manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.comfy.textforwarder">
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="24" />
<uses-permission-sdk-23 android:name="android.permission.SEND_SMS" />
<uses-permission-sdk-23 android:name="android.permission.READ_SMS" />
<uses-permission-sdk-23 android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Settings" />
<receiver
android:name=".MyReceiver"
android:enabled="false"
android:exported="true">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
</application>
Broadcast Receiver
public void onReceive(Context context, Intent intent) {
Log.d("RECEIVE", "Receiving SMS");
Bundle intentExtras = intent.getExtras();
if(intentExtras != null){
Object[] sms = (Object[]) intentExtras.get("pdus");
String msgStr = "";
for(int i = 0; i < sms.length; ++i){
SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) sms[i]);
String smsBoddeh = smsMessage.getMessageBody().toString();
String addr = smsMessage.getOriginatingAddress();
msgStr += "SMS From " + addr + "\n";
msgStr += smsBoddeh + "\n";
}
Toast.makeText(context.getApplicationContext(), msgStr, Toast.LENGTH_SHORT).show();
Log.d("RECEIVE", msgStr);
}
}

Try enabling the same..
<receiver
android:name="com.smsforwarder.smsforwarder.SMSReceiver"
**android:enabled="true">**
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED"/>
</intent-filter>
</receiver>

Push notify doesn't arrive

I build an android app composed by a web view, in parse.com i've got my device registered but when i send a push notification in "pushes sent" there is 0 pushes.
this is my Mainactivity:
import com.party.bparty.MainActivity;
import com.parse.Parse;
import com.parse.ParseInstallation;
import com.parse.ParsePush;
import com.parse.ParseQuery;
import com.parse.PushService;
public class MainActivity extends ActionBarActivity {
private WebView mWebView;
private String url = "http://www.bestparty.altervista.org";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//attivo parse per le notifiche
Parse.initialize(this,"zJxpd9798Ns6A9rzUDpe78ElRY0I99ES3LD6nDQV","kmAmA1iTbC32BTE9ERtzNOoHXbJchhIn6tyPXKMi");
PushService.setDefaultPushCallback(this, MainActivity.class);
ParseInstallation.getCurrentInstallation().saveInBackground();
//...
//...initializing and loading the contentview and the webview
}
//options menu omitted
}
this is my MycustomReceiver
public class MyCustomReceiver extends BroadcastReceiver {
private static final String TAG = "MyCustomReceiver";
#Override
public void onReceive(Context context, Intent intent) {
try {
if (intent == null)
Log.d(TAG, "Receiver intent null");
else {
String action = intent.getAction();
Log.d(TAG, "got action " + action );
if (action.equals("com.party.bparty.UPDATE_STATUS")) {
String channel = intent.getExtras().getString("com.parse.Channel");
JSONObject json = new JSONObject(intent.getExtras().getString("com.parse.Data"));
Log.d(TAG, "got action " + action + " on channel " + channel + " with:");
Iterator itr = json.keys();
while (itr.hasNext()) {
String key = (String) itr.next();
if (key.equals("customdata")) {
Intent pupInt = new Intent(context, ShowPopUp.class);
pupInt.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK );
context.getApplicationContext().startActivity(pupInt);
}
Log.d(TAG, "..." + key + " => " + json.getString(key));
}
}
}
}
catch (JSONException e) {
Log.d(TAG, "JSONException: " + e.getMessage());
}
}
}
and this is my ShowPopup
public class ShowPopUp extends Activity implements OnClickListener {
Button ok, cancel;
boolean click = true;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("Cupon");
setContentView(R.layout.popupdialog);
ok = (Button)findViewById(R.id.popOkB);
ok.setOnClickListener(this);
cancel = (Button)findViewById(R.id.popCancelB);
cancel.setOnClickListener(this);
}
#Override
public void onClick(View arg0) {
finish();
}
}
And this is my manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.party.bparty"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<permission
android:name="com.androidhive.pushnotifications.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.androidhive.pushnotifications.permission.C2D_MESSAGE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<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>
<activity
android:name="com.party.bparty.ShowPopUp"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
</activity>
<service android:name="com.parse.PushService" />
<receiver android:name="com.parse.ParseBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.RECEIVE_BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>
<receiver android:name="com.party.bparty.MyCustomReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
<action android:name="com.iakremera.pushnotificationdemo.UPDATE_STATUS" />
</intent-filter>
</receiver>
</application>
</manifest>
Where's my error?
I do it, but it doesn't work anyway
" if (action.equals("com.party.bparty.UPDATE_STATUS")) {
Pick one, either com.party.bparty.UPDATE_STATUS or com.iakremera.pushnotificationdemo.UPDATE_STATUS"
but Now i have 1 "PUSH SENT" in push sent, but my device doesn't show any push

Your receiver has the wrong filter. Your receiver is declared as this:
<receiver android:name="com.party.bparty.MyCustomReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
<action android:name="com.iakremera.pushnotificationdemo.UPDATE_STATUS" />
</intent-filter>
</receiver>
but you are checking for a different intent action in the code:
if (action.equals("com.party.bparty.UPDATE_STATUS")) {
Pick one, either com.party.bparty.UPDATE_STATUS or com.iakremera.pushnotificationdemo.UPDATE_STATUS and also make sure that Parse knows which one it is when you perform the push itself.

android Implement chatting through push notification using parse.com api

I am doing a chat application . In the app i have to do chatting with help of push notifications using parse andorid sdk. I am successfull to generate push notications between different users . But not able to recieve push and add their data in list view . Here is code of maifest file
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:name="example.chat.ChatApplication"
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.facebook.LoginActivity"
android:label="#string/app_name" />
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="#string/app_id" />
<activity
android:name="example.chat.LoginActivity"
android:label="#string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="example.chat.FriendslIst"
android:label="Friend list"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="example.chat.RegisterActivity"
android:label="#string/title_activity_register"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="example.chat.FriendListActivity"
android:label="#string/title_activity_friend_list"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="example.chat.ChatActivity"
android:label="#string/title_activity_chat"
android:screenOrientation="portrait" >
</activity>
<service android:name="com.parse.PushService" />
<receiver android:name="com.parse.ParseBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.RECEIVE_BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>
<receiver android:name="example.chat.MyCustomReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
<action android:name="example.chat.UPDATE_STATUS" />
</intent-filter>
</receiver>
</application>
and code for my custom reciever
public class MyCustomReceiver extends BroadcastReceiver {
private static final String TAG = "MyCustomReceiver";
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, ""+intent, Toast.LENGTH_LONG).show();
}
}
and from java code I am sending push like this :
ParseQuery<ParseInstallation> query = ParseInstallation.getQuery();
query.whereEqualTo("device_id", target);
ParsePush push = new ParsePush();
push.setQuery(query);
push.setMessage(message);
push.setExpirationTimeInterval(86400);
push.sendInBackground();
Please tell me where I am wrong for recieving data using reciever and what to do when i recive push means any logic or idea to move further . Thanks in advance

here is the manifiest file.....
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="your package name"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="your package name.YourActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="com.parse.PushService" />
<receiver android:name="com.parse.ParseBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.RECEIVE_BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>
<receiver android:name="your package name.YourCustomReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
<action android:name="your package name.UPDATE_STATUS" />
</intent-filter>
</receiver>
</application>
</manifest>
use this code to receive the push...
public class MyCustomReceiver extends BroadcastReceiver {
String title, from, msg;
#Override
public void onReceive(Context context, Intent intent) {
Bundle extras = intent.getExtras();
String message = extras != null ? extras.getString("com.parse.Data")
: "";
Log.e("message ", " " + message);
JSONObject jObject;
try {
if (message != null && !message.equals("")) {
jObject = new JSONObject(message);
from = jObject.getString("from");
msg = jObject.getString("title");
title = jObject.getString("msg");
GCMMessage gcmMessage = new GCMMessage();
gcmMessage.setMsg_body(msg);
gcmMessage.setMsg_title(title);
gcmMessage.setType(0);
gcmMessage.setDateTime(time);
DatabaseUtil.insertMessage(context, gcmMessage);
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
}
and here is the code to send push...
JSONObject obj;
try {
obj =new JSONObject();
obj.put("alert","oman expert ");
obj.put("action","Your Package name.UPDATE_STATUS");
data.put("from", ParseUser.getCurrentUser().getUsername());
obj.put("msg","hi");
obj.put("title","msg");
ParsePush push = new ParsePush();
ParseQuery query = ParseInstallation.getQuery();
push.setQuery(query);
push.setData(obj);
push.sendInBackground();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for any further query please let me know....

In the above code example, you have missed out few things,
Check your AndroidManifest.xml file, and add c2dm permissions,
permission android:name="your package.permission.C2D_MESSAGE" android:protectionLevel="signature"
uses-permission android:name="com.google.android.c2dm.permission.RECEIVE"
uses-permission android:name="your package.permission.C2D_MESSAGE"
While sending the data, set the action in your data,
JSONObject data = new JSONObject();
try {
data.put("action", "your package.GOT_MESSAGE");
data.put("ya", ya);
data.put("from", ParseUser.getCurrentUser().getUsername());
}catch (Exception e){
e.printStackTrace();
return;
}
ParsePush parsePush = new ParsePush();
parsePush.setData(data);

GCM no receive messages in 2.3.6 but it's ok in 4.1.2

The problem is only with android 2.3.6 .
With 4.x, there isn't any problem, the receiver it's ok.
I have received the registration ID with 2.3.6 but the messages are never received.
My Manifest is:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="net.arte.biluna”
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<permission
android:name="net.arte.biluna.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="net.arte.biluna.permission.C2D_MESSAGE" />
<application
android:name="net.arte.biluna.businesslogic.CosmoApplication"
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/Theme.Sherlock.Light" >
<!-- android:theme="#style/Theme.Sherlock" > -->
<activity
android:name="net.arte.biluna.SplashScreen"
android:label="#string/app_name"
android:launchMode="singleTask"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="net.arte.biluna.GreatestActivity"
android:screenOrientation="portrait" />
<activity
android:name="net.arte.biluna.LogInActivity"
android:screenOrientation="portrait" />
<activity
android:name="net.arte.biluna.HomePage"
android:screenOrientation="portrait" />
<activity
android:name="net.arte.biluna.LiveTourActivity"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" />
<activity
android:name="net.arte.biluna.ChatActivity"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" />
<activity
android:name="net.arte.biluna.ForYouActivity"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" />
<activity
android:name="net.arte.biluna.StoreActivity"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<service android:name="net.arte.biluna.GcmIntentService" />
<receiver
android:name="net.arte.biluna.GcmBroadcastReceiver"
android:exported="true"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="net.arte.biluna" />
</intent-filter>
</receiver>
</application>
My receiver:
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmIntentService will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(),
GcmIntentService.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
my activity:
...
if (checkPlayServices()) {
gcm = GoogleCloudMessaging.getInstance(this);
regid = getRegistrationId(context);
if (regid.equals("")) {
registerInBackground();
}
}
...
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
finish();
}
return false;
}
return true;
}

Check the Google play services version number and there is a pretty defined method to check Google play services a availability

Latest release of gcm using google play is very easy to implement and can be used for longer time.
See this tutorial. Hope it might help.
http://techlovejump.in/2013/11/android-push-notification-using-google-cloud-messaging-gcm-php-google-play-service-library/