Merge "ConnectivityThread: use lazy holder idiom"

 * @hide

 */

public final class ConnectivityThread extends HandlerThread {

    private static ConnectivityThread sInstance;

    // A class implementing the lazy holder idiom: the unique static instance

    // of ConnectivityThread is instantiated in a thread-safe way (guaranteed by

    // the language specs) the first time that Singleton is referenced in get()

    // or getInstanceLooper().

    private static class Singleton {

        private static final ConnectivityThread INSTANCE = createInstance();

    }

    private ConnectivityThread() {

        super("ConnectivityThread");

    }

    private static synchronized ConnectivityThread getInstance() {

        if (sInstance == null) {

            sInstance = new ConnectivityThread();

            sInstance.start();

        }

        return sInstance;

    private static ConnectivityThread createInstance() {

        ConnectivityThread t = new ConnectivityThread();

        t.start();

        return t;

    }

    public static ConnectivityThread get() {

        return getInstance();

        return Singleton.INSTANCE;

    }

    public static Looper getInstanceLooper() {

        return getInstance().getLooper();

        return Singleton.INSTANCE.getLooper();

    }

}