android-lifecycle

问题 I know that a fragment's view hierarchy has to be inflated in onCreateView, but what other functionality can be in onCreateView vs. what should wait for onActivityCreated? My current implementation uses separate activities for everything, and a typical activity does most of its work in its onCreate method, including inflating the view, setting the content view, initializing the various widgets with data, setting up listeners, etc. So can this probably all be moved into onCreateView, or should

问题 I know that a fragment's view hierarchy has to be inflated in onCreateView, but what other functionality can be in onCreateView vs. what should wait for onActivityCreated? My current implementation uses separate activities for everything, and a typical activity does most of its work in its onCreate method, including inflating the view, setting the content view, initializing the various widgets with data, setting up listeners, etc. So can this probably all be moved into onCreateView, or should

问题 I know that a fragment's view hierarchy has to be inflated in onCreateView, but what other functionality can be in onCreateView vs. what should wait for onActivityCreated? My current implementation uses separate activities for everything, and a typical activity does most of its work in its onCreate method, including inflating the view, setting the content view, initializing the various widgets with data, setting up listeners, etc. So can this probably all be moved into onCreateView, or should

问题 Right off the top, I want to clarify something: The button that I am struggling with is NOT the back button. I am referring to the up/home button in the ActionBar / Toolbar at the top of the app, not the Android button at the bottom. There are a few posts of a similar nature, but they address the back button, not the up button. Here is the situation: I have an Activity A that has a ListView fragment. When the user clicks on a list view item, it launches Activity B. Pretty typical. Activity A

问题 I have three activity: - SplashActivity - MainActivity - PlayerActivity Of course the app starts with SplashActivity, then it starts MainActivity and closes. MainActivity in some moment starts PlayerActivity and goes to backstack. (MainActivity is alive but is onStop) Then I need open MainActivity and set PlayerActivity to background (PlayerActivity is alive but is onStop). Then I need open PlayerActivity again and set MainActivity to background. So PlayerActivity and MainActivity often gets

问题 I have three activity: - SplashActivity - MainActivity - PlayerActivity Of course the app starts with SplashActivity, then it starts MainActivity and closes. MainActivity in some moment starts PlayerActivity and goes to backstack. (MainActivity is alive but is onStop) Then I need open MainActivity and set PlayerActivity to background (PlayerActivity is alive but is onStop). Then I need open PlayerActivity again and set MainActivity to background. So PlayerActivity and MainActivity often gets

问题 Well, in my application I'm using default camera and gallery of Android with startActivityforResult as; Intent i = new Intent("android.intent.action.PICK", MediaStore.Images.Media.EXTERNAL_CONTENT_URI); i.setType("image/*"); startActivityForResult(i, this.SELECT_PICTURE); I am able to catch onActivityResult as well. However, if memory is low and I start this activity, I experienced that system is killing my parent activity, and even if the activity returns with a value, I lost all my local

问题 I want some view animation to occur after resuming my activity, but I can't succeed to catch the time after all the views loaded and the animation started before all the views loaded (before the animation transition). i tried to use onDraw, onWindowFocusChange, onResume, I discovered that onDraw is the last method on the life cycle of view but I still saw that the animation start before the user see the all the views 回答1: Here is Android Activity lifecycle & Android View lifecycle tested on

问题 I want some view animation to occur after resuming my activity, but I can't succeed to catch the time after all the views loaded and the animation started before all the views loaded (before the animation transition). i tried to use onDraw, onWindowFocusChange, onResume, I discovered that onDraw is the last method on the life cycle of view but I still saw that the animation start before the user see the all the views 回答1: Here is Android Activity lifecycle & Android View lifecycle tested on

问题 This question already has answers here : Difference between onCreate() and onStart()? [duplicate] (2 answers) Closed 5 years ago . I have been wondering for some time about the exact role of onStart() function in android life cycle. Most of the resources on net just say - it is called just before your activity becomes visible on the screen. But the applications that I have made so far I have never used onStart(). I do all my initialization in onCreate() itself. All other states in android