如何停止使用postDelayed完成的线程的启动

        Handler mHandler = new Handler();
        OverclockThread ocThread = new OverclockThread();
        ocThread.ocPreference = readPreference("oc");
        ocThread.serviceOn = true;

        if (Intent.ACTION_SCREEN_ON.equals(action)) {
            ocThread.screenOff = false;
            mHandler.postDelayed(ocThread, 15000);
        }