@Override     public void onAttachedToWindow() {         // TODO Auto-generated method stub         Log.d("aeon","onAttachedToWindow");         this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);          super.onAttachedToWindow();     } 

<uses-permission android:name="android.permission.DISABLE_KEYGUARD" >     </uses-permission> 

protected void onSaveInstanceState(Bundle outState) 

@Override      protected void onUserLeaveHint() {          Log.d("aeon","onUserLeaveHint");          super.onUserLeaveHint();      } 

//注册Receiver                   HomeKeyEventBroadCastReceiver receiver = new HomeKeyEventBroadCastReceiver();               registerReceiver(receiver, new IntentFilter(                             Intent. ACTION_CLOSE_SYSTEM_DIALOGS)); 

private void handleLongPressOnHome() {          // We can't initialize this in init() since the configuration hasn't been loaded yet.          if (mLongPressOnHomeBehavior < 0) {              mLongPressOnHomeBehavior                      = mContext.getResources().getInteger(R.integer.config_longPressOnHomeBehavior);              if (mLongPressOnHomeBehavior < LONG_PRESS_HOME_NOTHING ||                      mLongPressOnHomeBehavior > LONG_PRESS_HOME_RECENT_SYSTEM_UI) {                  mLongPressOnHomeBehavior = LONG_PRESS_HOME_NOTHING;              }          }            if (mLongPressOnHomeBehavior != LONG_PRESS_HOME_NOTHING) {              performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false);              sendCloseSystemWindows(SYSTEM_DIALOG_REASON_RECENT_APPS);                // Eat the longpress so it won't dismiss the recent apps dialog when              // the user lets go of the home key              mHomeLongPressed = true;          }            if (mLongPressOnHomeBehavior == LONG_PRESS_HOME_RECENT_DIALOG) {              showOrHideRecentAppsDialog(RECENT_APPS_BEHAVIOR_SHOW_OR_DISMISS);          } else if (mLongPressOnHomeBehavior == LONG_PRESS_HOME_RECENT_SYSTEM_UI) {              try {                  IStatusBarService statusbar = getStatusBarService();                  if (statusbar != null) {                      statusbar.toggleRecentApps();                  }              } catch (RemoteException e) {                  Slog.e(TAG, "RemoteException when showing recent apps", e);                  // re-acquire status bar service next time it is needed.                  mStatusBarService = null;              }          }      }