lifecycle

问题 I spent 4 full days trying everything I can to figure out the memory leak in an app I\'m developing, but things stopped making sense a long time ago. The app I\'m developing is of social nature, so think profile Activities (P) and list Activities with data - for example badges (B). You can hop from profile to a badge list to other profiles, to other lists, etc. So imagine a flow like this P1 -> B1 -> P2 -> B2 -> P3 -> B3, etc. For consistency, I\'m loading profiles and badges of the same user

问题 What is the life cycle of an Android activity? Why are so many similar sounding methods ( onCreate() , onStart() , onResume() ) called during initialization, and so many others ( onPause() , onStop() , onDestroy() ) called at the end? When are these methods called, and how should they be used properly? 回答1: See it in Activity Lifecycle (at Android Developers). onCreate() : Called when the activity is first created. This is where you should do all of your normal static set up: create views,

问题 I have a view made up of TableLayout, TableRow and TextView . I want it to look like a grid. I need to get the height and width of this grid. The methods getHeight() and getWidth() always return 0. This happens when I format the grid dynamically and also when I use an XML version. How to retrieve the dimensions for a view? Here is my test program I used in Debug to check the results: import android.app.Activity; import android.os.Bundle; import android.widget.TableLayout; import android

问题 Could you explain me the correct manner to manage the UIViewController lifecycle? In particular, I would like to know how to use Initialize , ViewDidLoad , ViewWillAppear , ViewDidAppear , ViewWillDisappear , ViewDidDisappear , ViewDidUnload and Dispose methods in Mono Touch for a UIViewController class. 回答1: All these commands are called automatically at the appropriate times by iOS when you load/present/hide the view controller. It's important to note that these methods are attached to