android - How to push notifications with Google Cloud Messaging? -

i'm trying implement push notification in android app. understand, need sender , receiver installed on device.

i googled on gcm found need create project in google dev console. got project id , api key.

i found there third party applications (mixpanel) can send push notifications information above. can use google play send notifications app users?

on programming side, got permissions required in manifest.xml file

<uses-permission android:name="android.permission.internet" /> <!-- gcm connects internet services. --> <uses-permission android:name="android.permission.internet" />  <!-- gcm requires google account. --> <uses-permission android:name="android.permission.get_accounts" />  <!-- keeps processor sleeping when message received. --> <uses-permission android:name="android.permission.wake_lock" />  <!-- creates custom permission app can receive messages. --> <permission     android:name="com.androidexample.gcm.permission.c2d_message"     android:protectionlevel="signature" />  <uses-permission android:name="com.androidexample.gcm.permission.c2d_message" />  <!-- app has permission register , receive data message. --> <uses-permission android:name="com.google.android.c2dm.permission.receive" />  <!-- network state permissions detect internet status --> <uses-permission android:name="android.permission.access_network_state" />  <!-- permission vibrate --> <uses-permission android:name="android.permission.vibrate" /> 

and broadcast receiver

<receiver     android:name="com.google.android.gcm.gcmbroadcastreceiver"     android:permission="com.google.android.c2dm.permission.send" >     <intent-filter>          <!-- receives actual messages. -->         <action android:name="com.google.android.c2dm.intent.receive" />         <!-- receives registration id. -->         <action android:name="com.google.android.c2dm.intent.registration" />          <category android:name="com.androidexample.gcm" />     </intent-filter> </receiver>  <service android:name="com.androidexample.gcm.gcmintentservice" /> 

from here on, got confused "sender" , "receiver" parts.

do have implement gcmbroadcastreceiver?

if want implement receiving notification part, how ?

any reference working code example good.

yes, have implement gcmbroadcastreceiver class catch messages gcm service. purpose of receiver start intent service if app off. here common implementation:

public class gcmbroadcastreceiver extends wakefulbroadcastreceiver {     @override     public void onreceive(context context, intent intent) {         componentname comp = new componentname(context.getpackagename(), gcmintentservice.class.getname());         startwakefulservice(context, (intent.setcomponent(comp)));         setresultcode(activity.result_ok);     } } 

the purpose of intent service doing caught gcm message:

public class gcmintentservice extends intentservice {     @override     protected void onhandleintent(intent intent) {         // getting gcm message fields         bundle extras = intent.getextras();         // doing message.         // e.g. showing push notification     } } 

you can see e.g. this article details.