pubsub-android

Installing and consuming Pubsub.io in Android

Android libraries are somewhat different from normal Java libraries in that you will often download the whole Eclipse project rather than a pre-compiled .jar file. That's why you need:

Installing the library

1. Install a Git client for your computer
2. Clone this repository by writing the following in the terminal. git clone https://github.com/pubsubio/pubsub-android
3. Start Eclipse
4. Right-click the Package Explorer area (don't right-click a project!) and select Import
5. Select General and then Existing projects into workspace
6. Select the Select root_directory radio button and press browse
7. Navigate to, and select, the directory/folder where you cloned the pubsub-android library (see: point 2 in this list)
8. Press Finish

Consuming the library

1. Create your new Android project
2. Right-click your project in the Package Explorer and select Properties
3. Select Android and scroll down to the section called Library
4. Press Add and select the library called pubsub_android

Getting started with Pubsub.io for Android

** Create the Pubsub object, this will be your main interaction channel with the Pubsub service.**

	Pubsub mPubsub = new Pubsub( this, mHandler );

** All events in Pubsub.io are recievied through a Handler interface, register a new Handler and call it "mHandler". **

	private Handler mHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case Pubsub.CONNECTED_TO_HOST:
				// React when a connection attempt was successfull, for example:
				// Subscribing or publishing
				break;
			case Pubsub.CONNECTION_FAILED:
				// React when a connection attempt failed, for example:
				// Issue another connection attempt in a few seconds.
				break;
			case Pubsub.CONNECTION_LOST:
				// React when a connection was lost, for example:
				// Inform the user and abort any pubsub-dependant tasks.
				break;
			}
		}
	};

** Subscribing to a topic. **

	private static final int MY_FILTER = 1;
	
	JSONObject filter = new JSONObject();
	try {
		filter.put("name", "value");
		mPubsub.subscribe(filter, MY_FILTER);
	} catch (JSONException e) {
		e.printStackTrace();
	}

** Publishing to a topic. **

	JSONObject doc = new JSONObject();
	try {
		filter.put("name", "value");
		mPubsub.publish(doc);
	} catch (JSONException e) {
		e.printStackTrace();
	}

Also, make sure to add the following tags in your manifest file.

• Add a tag with the INTERNET rule.
• Add a tag with the ACCESS_NETWORK_STATE rule.