@Override
 protected void onDestroy() {
   super.onDestroy();
   cameraFuncation.clearCamera();
   appLockApplication.setLastAppEnterPwdState(
       bPwdIsCorrent, new Date().getTime(), errorCount, lastDelayTime);
   if (mCountdownTimer != null) mCountdownTimer.cancel();
 }
 @Override
 protected void onStop() {
   cameraFuncation.clearCamera();
   appLockApplication.setLastAppEnterPwdState(
       bPwdIsCorrent, new Date().getTime(), errorCount, lastDelayTime);
   if (!unGoHome) {
     AppLockApplication.getInstance().goHome(this);
   }
   super.onStop();
 }