how to switch android profile based on time?

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Mobile

Android

hi..i have one problem...i want to do like this..in android.
user enter his determined time..and i want to at that time profile would be changed ..synchronization with avd's time in every two second...and profile changed ..but one problem is there...

for(i=0;i<100;i++)
    {
                       while (System.currentTimeMillis() <   endTime) {
                                   synchronized (this) {
                                   try {
                                                  wait(endTime - System.currentTimeMillis());
                                         } catch (Exception e) {
                                               }
                                   }
                       }
    }

please give right coding..thanks in advance.