Android Gameloop Thread.join() hangs application

Hey all i am implementing the gameloop found here: http://obviam.net/index.php/the-android-game-loop/

My question is why does having:

    boolean retry = true;
    while (retry) {
        try {
            thread.join();
            retry = false;
        } catch (InterruptedException e) {
            // try again shutting down the thread
        }
    }

In my su开发者_Go百科rfaceDestroyed() function of my game view hang the application?

thread.join() will BLOCK until the thread you're joining completes. If that thread never completes, that function will never release.

Because thread.join() blocks the calling thread until thread is done.