lifecycle

Right now, a widget only has initeState() that gets triggered the very first time a widget is created, and dispose(), which gets triggered when the widget is destroyed. Is there a method to detect when a widget comes back to the foreground? and when a widget is about to go to the background because another widget just was foregrounded? It's the equivalent of onResume and onPause being triggered for Android, and viewWillAppear and viewWillDisappear for ios The most common case where you'd want to do this is if you have an animation running and you don't want to consume resources in the

I often get doubt on these two phases. The following is my understanding: Apply Request Values In this phase, the submitted values are coming from the request parameter. Then the request values are set into the backing bean ie.setting to components UIInput Update Model Values In this phase, processed values are transferred from backing bean (UIInput) to managed beans. (It is our custom defined JSF beans). I am thinking that my understanding is correct. But, reading few articles made me confused. I want to make me more clear on these two phases. Please clarify me. Apply Request Values In this

I just found that when the device has lock screen enabled, the followings happen. For this activity, android:screenOrientation="landscape" is set in the manifest. Then I perform the followings with my phone in a portrait mode. The user opens an activity. onCreated() is called onStart() is called onResume() is called The user LOCKS the device 4.5 onPause is called() onDestroy() is called onCreate() is called onStart() is called onResume() is called 8.5 onPause is called() The user UNLOCKS the device onResume() is called onDestroy() is called onCreate() is called onStart() is called onResume()

is there any way to know the state of my application if it is in background mode or in foreground . Thanks Anbu.Karthik [UIApplication sharedApplication].applicationState will return current state of applications such as: UIApplicationStateActive UIApplicationStateInactive UIApplicationStateBackground or if you want to access via notification see UIApplicationDidBecomeActiveNotification Swift 3+ let state = UIApplication.shared.applicationState if state == .background || state == .inactive { // background } else if state == .active { // foreground } switch UIApplication.shared.applicationState

I am using the following method to switch between Fragments (in my NavigationDrawer) by showing / hiding them. protected void showFragment(int container, Fragment fragment, String tag, String lastTag, boolean addToBackStack ) { FragmentManager fragmentManager = getSupportFragmentManager(); FragmentTransaction transaction = fragmentManager.beginTransaction(); if ( lastTag != null && !lastTag.equals("")) { Fragment lastFragment = fragmentManager.findFragmentByTag( lastTag ); if ( lastFragment != null ) { transaction.hide( lastFragment ); } } if ( fragment.isAdded() ) { transaction.show( fragment