Observes network connection status & gives callbacks
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Merlin aims to simplify network monitoring. Providing 3 registerable callbacks for network connectivity changes. onConnect() , onDisconnect() and onBind(NetworkStatus networkStatus).

Adding to your project

To start using Merlin, add these lines to your module's build.gradle:

repositories {

dependencies {
    compile 'com.novoda:merlin:1.1.7'

Optional steps

Note: these steps should not be necessary as the Manifest Merger should be taking care of this for you!

If for some reason your app's manifest doesn't end up containing the required entries, and you encounter issues, you might need to manually add a few things to your AndroidManifest.xml:

  1. These permissions:

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  2. This service:

      android:name="com.novoda.merlin.service.MerlinService" />

Sample usage

Create Merlin:

merlin = new Merlin.Builder().withConnectableCallbacks().build(context);

Bind and unbind the service in your activity:

protected void onResume() {

protected void onPause() {

Register for callbacks:

merlin.registerConnectable(new Connectable() {
    public void onConnect() {
        // Do something you haz internet!

For further details you can check the wiki.

Migrating from pre-v1 versions

Version 1 of Merlin introduced several breaking changes in the implementation and the APIs, to account for the latest changes in Android N+. Please follow the instructions in the wiki to make the upgrade as painless as possible.

RxJava support in v1.0+

Starting in version 1.0.0, the RxJava support is no longer built into the library but it has been split out into a separate artifact. You'll need to add one of these two dependencies, depending on the version of RxJava you use:

// For RxJava 1.x
compile 'com.novoda:merlin-rxjava:[version_number]'

// For RxJava 2.x
compile 'com.novoda:merlin-rxjava2:[version_number]'


Here are a list of useful links:

  • We always welcome people to contribute new features or bug fixes, here is how
  • If you have a problem check the Issues Page first to see if we are working on it
  • For further usage or to delve more deeply checkout the Project Wiki
  • Looking for community help, browse the already asked Stack Overflow Questions or use the tag: support-merlin when posting a new question