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Pusher Android Library

pusher-websocket-android is a wrapper library around pusher-websocket-java. Whereas the underlying library is a purely Java library, this library has interaction with Android APIs. As a result, we can provide a better experience for mobile developers. We can also use Pusher's new BETA feature: native push notifications.

This README will only cover library-specific features. In order to get the core documentation, please visit the README of pusher-websocket-java.

Please note that this library is still in beta and may not be ready in a production environment. As this library is still pre-1.0, expect breaking changes. Feel free to raise an issue about any bugs you find.

Installation

You can install the library via Gradle. First add an additional repository to your $PROJECT_ROOT/build.gradle:

repositories {
  maven { url 'http://clojars.org/repo' }
}

Then add these dependencies to your $PROJECT_ROOT/app/build.gradle:

dependencies {
  // for GCM
  compile 'com.google.android.gms:play-services-gcm:9.0.0'

  // for FCM
  compile 'com.google.firebase:firebase-messaging:9.4.0'
  compile 'com.google.firebase:firebase-core:9.4.0'


  compile 'com.pusher:pusher-websocket-android:0.3.1'
}

// for GCM and FCM
apply plugin: 'com.google.gms.google-services'

In your project-level build.gradle add:

buildscript {
  dependencies {
    classpath 'com.google.gms:google-services:3.0.0'
  }
}

Push Notifications

GCM

This feature requires some set up on your behalf. See our guide to setting up push notifications for Android for a friendly introduction.

• That you have an app (a.k.a. project) on the Google Developers Console
• That you have a Server API Key which you have uploaded to the Pusher dashboard
• That you have a valid configuration file for Google services in your app/ directory

Add to your AndroidManifest.xml the following:

<manifest>
  <!-- ... -->

  <!-- GCM permissions -->
  <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
  <uses-permission android:name="android.permission.WAKE_LOCK" />

  <application>
    <!-- ... -->

    <!-- <application> -->
    <!-- Pusher's GCM listeners and services -->
    <receiver
        android:name="com.google.android.gms.gcm.GcmReceiver"
        android:exported="true"
        android:permission="com.google.android.c2dm.permission.SEND" >
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            <category android:name="gcm.play.android.samples.com.gcmquickstart" />
        </intent-filter>
    </receiver>

    <service
        android:name="com.pusher.android.notifications.gcm.PusherGCMListenerService"
        android:exported="false" >
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        </intent-filter>
    </service>

    <service
        android:name="com.pusher.android.notifications.gcm.GCMInstanceIDListenerService"
        android:exported="false">
        <intent-filter>
            <action android:name="com.google.android.gms.iid.InstanceID"/>
        </intent-filter>
    </service>

    <service
        android:name="com.pusher.android.notifications.gcm.GCMRegistrationIntentService"
        android:exported="false">
    </service>

    <!-- ... -->
  </application>

  <!-- ... -->
</manifest>

Pusher's GCM listeners and services above allow the library to handle incoming tokens and keep state synced with our servers.

FCM

To start with, you will need to add Firebase to your project. Then, in your application manifest, you need to register these services:

<application>
  <service
      android:name="com.pusher.android.notifications.fcm.FCMMessagingService">
      <intent-filter>
          <action android:name="com.google.firebase.MESSAGING_EVENT"/>
      </intent-filter>
  </service>

  <service
      android:name="com.pusher.android.notifications.fcm.FCMInstanceIDService">
      <intent-filter>
          <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
      </intent-filter>
  </service>
</application>

Registering Your Device With Pusher

You can start registering for push notifications in an Activity or any other valid Context. You will need to check Google Play Services availability on the device, with a function such as:

public class MainActivity extends AppCompatActivity {
    private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
    private static final String TAG = "yourtag";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
      if (playServicesAvailable()) {
        // ... set up Pusher push notifications
      } else {
        // ... log error, or handle gracefully
      }
    }

    private boolean playServicesAvailable() {
        GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
        int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (apiAvailability.isUserResolvableError(resultCode)) {
                apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
                        .show();
            } else {
                Log.i(TAG, "This device is not supported.");
                finish();
            }
            return false;
        }
        return true;
    }

    // ...
}

Assuming that Google Play services are available, you can then register for push notifications.

GCM

Expand your onCreate handler to instantiate a PusherAndroid, get the native push notification object from it, and register using the sender ID fetched from your google-services.json file:

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      if (playServicesAvailable()) {
        PusherAndroid pusher = new PusherAndroid(<pusher_api_key>);
        PushNotificationRegistration nativePusher = pusher.nativePusher();
        String defaultSenderId = getString(R.string.gcm_defaultSenderId); // fetched from your google-services.json
        nativePusher.registerGCM(this, defaultSenderId);
      } else {
        // ... log error, or handle gracefully
      }
    }
    // ...
}

Having called register this will start an IntentService under the hood that uploads the device token to Pusher.

FCM

For Firebase Cloud Messaging, instead of registerGCM we call registerFCM, passing in the context:

nativePusher.registerFCM(this);

Listening For Registration Progress

To get progress updates on your registration to GCM or FCM, you can optionally pass a PushNotificationRegistrationListener:

PushNotificationRegistrationListener listener = new PushNotificationRegistrationListener() {
    @Override
    public void onSuccessfulRegistration() {
        System.out.println("REGISTRATION SUCCESSFUL!!! YEEEEEHAWWWWW!");

    }

    @Override
    public void onFailedRegistration(int statusCode, String response) {
        System.out.println(
                "A real sad day. Registration failed with code " + statusCode +
                        " " + response
        );
    }
}

// GCM
nativePusher.registerGCM(this, defaultSenderId, listener);

// FCM
nativePusher.registerFCM(this, listener);

Receiving Notifications

Pusher has a concept of interests which clients can subscribe to. Whenever your server application sends a notification to an interest, subscribed clients will receive those notifications.

Subscribing to an interest is simply a matter of calling:

PushNotificationRegistration nativePusher = pusher.nativePusher();
nativePusher.subscribe("kittens"); // the client is interested in kittens

To unsubscribe to an interest:

nativePusher.unsubscribe("kittens"); // we are no longer interested in kittens

You can also keep track of the state of your subscriptions or un-subscriptions by passing an optional InterestSubscriptionChangeListener:

nativePusher.subscribe("kittens", new InterestSubscriptionChangeListener() {
    @Override
    public void onSubscriptionChangeSucceeded() {
        System.out.println("Success! I love kittens!");
    }

    @Override
    public void onSubscriptionChangeFailed(int statusCode, String response) {
        System.out.println(":(: received " + statusCode + " with" + response);
    }
});

If you wish to set a custom callback for when GCM notifications come in:

nativePusher.setGCMListener(new GCMPushNotificationReceivedListener() {
    @Override
    public void onMessageReceived(String from, Bundle data) {
      // do something magical 🔮
    }
});

For FCM:

nativePusher.setFCMListener(new FCMPushNotificationReceivedListener() {
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
      // do something magical 🔮
    }
});

Configuring the notifications client

Setting the host of Pusher's notifications server

PusherAndroidOptions options = new PusherAndroidOptions();
options.setNotificationHost("yolo.io");

PusherAndroid pusher = new PusherAndroid("key", options);

Using SSL

The client uses SSL by default. To unset it:

PusherAndroidOptions options = new PusherAndroidOptions();
options.setNotificationEncrypted(false);
PusherAndroid pusher = new PusherAndroid("key", options);