Difference between LocalBroadcastManager's sendBroadcast vs sendBroadcastSync?

from the CommonsWare Community archives

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At September 1, 2018, 6:41pm, hackzcorporation asked:

Getting Exception While Calling sendBroadcastSync() from background thread while its running fine when using sendBroadcast():

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
        at android.os.Handler.<init>(Handler.java:197)
        at android.os.Handler.<init>(Handler.java:111)
        at android.widget.Toast$TN.<init>(Toast.java:324)
        at android.widget.Toast.<init>(Toast.java:91)
        at android.widget.Toast.makeText(Toast.java:238)
        at com.hackz.localbc.MainActivity$2.onReceive(MainActivity.java:52)
        at android.support.v4.content.LocalBroadcastManager.executePendingBroadcasts(LocalBroadcastManager.java:313)
        at android.support.v4.content.LocalBroadcastManager.sendBroadcastSync(LocalBroadcastManager.java:290)
        at com.hackz.localbc.MainActivity$SendText.run(MainActivity.java:65)

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At September 1, 2018, 6:54pm, mmurphy replied:

sendBroadcastSync() calls onReceive() on the current thread, and you cannot raise a Toast from a background thread. Use sendBroadcast() instead, and onReceive() will be called on the main application thread, from which you can display your Toast. Or, do not display a Toast in onReceive().

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At September 1, 2018, 6:58pm, hackzcorporation replied:

Ohh …That’s the problem.
Official Docs says:

Like sendBroadcast(Intent) , but if there are any receivers for the Intent this function will block and immediately dispatch them before returning

I think it means that sendBroadcastSync(intent) will always guarantee that onReceive() is called and after that it executes other code?
In other words sendBroadCast() is asynchronous and sendBroadcastSync() is synchronous!
I understand it right?

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At September 1, 2018, 7:14pm, mmurphy replied:

Yes (assuming that there is at least one matching registered receiver).

In other words sendBroadCast() is asynchronous and sendBroadcastSync() is synchronous!

Yes.