Android 隱藏Fragment

FragmentManager fManager = getFragmentManager();
                  fManager.beginTransaction()
                          .setCustomAnimations(android.R.animator.fade_in,
                                  android.R.animator.fade_out)
                          .show(yourFragmentName).commit();

KeyguardManager km = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
boolean locked = km.inKeyguardRestrictedInputMode();