sprockets/src/main/java/net/sf/sprockets/os/Loopers.java
public static Looper mineOrMain() {
        Looper looper = Looper.myLooper();
        return looper != null ? looper : Looper.getMainLooper();
    }
public static Looper mineOrMain() {
        Looper looper = Looper.myLooper();
        return looper != null ? looper : Looper.getMainLooper();
    }
Get this thread's Looper, if it's a Looper thread. Otherwise get the main thread Looper.