FaceBook is an open source library that tests network access speeds

Network Connection Class is an Android library that allows you to figure out the quality of the current user’s internet connection. The connection gets classified into several “Connection Classes” that make it easy to develop against. The library does this by listening to the existing internet traffic done by your app and notifying you when the user’s connection quality changes. Developers can then use this Connection Class information and adjust the application’s behaviour (request lower quality images or video, throttle type-ahead, etc).

Network Connection Class currently only measures the user’s downstream bandwidth. Latency is also an important factor, but in our tests, we’ve found that bandwidth is a good proxy for both.

The Network Connection Class library takes care of spikes using a moving average of the incoming samples:

Integration

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The compile 'com.facebook.net work. Connectionclass: connectionclass: 1.0.0'Copy the code

Com.facebook.net work. Connectionclass connectionclass 1.0.0Copy the code

Calculate Connection Class

Connection Class provides an interface for classes to add themselves as listeners for when the network’s connection quality changes. In the subscriber class, implement ConnectionClassStateChangeListener:

public interface ConnectionClassStateChangeListener {
  public void onBandwidthStateChange(ConnectionQuality bandwidthState);
}Copy the code

and subscribe with the listener:

ConnectionClassManager.getInstance().register(mListener);Copy the code

Alternatively, you can manually query for the current connection quality bucket with getCurrentBandwidthQuality().

ConnectionQuality cq = ConnectionClassManager.getInstance().getCurrentBandwidthQuality();Copy the code

The main way to provide the ConnectionClassManager data is to use the DeviceBandwidthSampler. The DeviceBandwidthSampler samples the device’s underlying network stats when you tell it you’re performing some sort of network activity (downloading photos, playing a video, etc).

// Override ConnectionClassStateChangeListener
ConnectionClassManager.getInstance().register(mListener);
DeviceBandwidthSampler.getInstance().startSampling();
// Do some downloading tasks
DeviceBandwidthSampler.getInstance().stopSampling();Copy the code

If the application is aware of the bandwidth downloaded in a certain time frame, data can be added to the moving average using:

ConnectionClassManager.addBandwidth(bandwidth, time);Copy the code

See the connectionclass-sample project for more details.

Improve Connection Class!

License

Connection Class is BSD-licensed. We also provide an additional patent grant.