Thanks Dianne, it all makes sense now! So I guess the number after $ (i.e. 2500) is probably just some memory offset or something..
On 8월25일, 오후2시54분, Dianne Hackborn <[email protected]> wrote: > It's a thunk to allow an inner class to call a private method (or access a > private variable) on its containing class. > > I've started getting in the habit of going through code and getting rid of > private methods and variables from these core system classes, to get rid of > such thunks, but that does have the unfortunately side-effect of not > allowing Eclipse to show you unnused methods and variables. Compromises, > compromises. > > 2009/8/25 Brian <[email protected]> > > > > > > > > > Thanks for the reply. I understand that the $ sign is normally used to > > denote a nested/inner class. > > > In the above example (ActivityThread.java - > > >http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;... > > ) > > > android.app.ActivityThread$H.handleMessage > > > Refers to the H class, which is nested in ActivityThread.java: > > > 1621 private final class H extends Handler {....} > > > However, as for > > > at android.app.ActivityThread.handleDestroyActivity > > (ActivityThread.java:3180) > > at android.app.ActivityThread.access$2500(ActivityThread.java:115) > > at android.app.ActivityThread$H.handleMessage(ActivityThread.java: > > 1745) > > > I still don't understand fully what it can mean. > > > Looking at the source code (line number a bit off due to diff. > > version): > > > (in function H.handleMessage) > > 1723 case DESTROY_ACTIVITY: > > 1724 handleDestroyActivity((IBinder)msg.obj, > > msg.arg1 != 0, > > 1725 msg.arg2, false); > > 1726 break; > > > This is the section of interest. So I get ActivityThread > > $H.handleMessage (handleMessage function of class H nested inside > > ActivityThread). > > > However, I don't get ActivityThread.access$2500 for a couple reasons: > > > 1. Line number points to beginning of the ActivityClass > > 2. ActivityThread.access seems to refer to a function name, but > > there's no "access" function > > 3. access$2500 (so is access a function or class) and I have no idea > > what the number 2500 means > > 4. I would also like to know how the number 2500 is generated (is it > > random? depends on task #?) > > > I tried using DDMS on a similar code, thinking that maybe (IBinder) > > msg.obj casting is referring to it. But when I stepped through a > > similar code (object casting), I didn't see "access$2500" or anything > > similar to it. It just jumped straight on to the function being > > called. > > > I tried googling it, but to no avail... > > > On 8월25일, 오후1시08분, Streets Of Boston <[email protected]> wrote: > > > The $ is used to seperate the inner class from the main class; > > > > Example: > > > > packager a.b.c > > > > public class MyClass { > > > ... > > > static class OtherClass { > > > void someMethod() { > > > ... > > > exception.printStackTrace(); > > > ... > > > } > > > ... > > > } > > > ... > > > > } > > > > would print out as ' at a.b.c.MyClass$OtherClass.someMethod > > > (MyClass.java:322)' > > > > I'm not sure about the '2500'. It could be an anonymous class..? > > > > public void accessExample() { > > > Runnable r = new Runnable() { > > > public void run() { ... } > > > }; > > > ... > > > } > > > > where the class of the instance 'r' is anonymous and compiled as > > > '2500'. > > > > On Aug 25, 11:47 am, Brian <[email protected]> wrote: > > > > > Hi all, > > > > > I wanted to understand what the $ sign and the number after a $ sign > > > > meant in a backtrace. > > > > > For example, consider the following backtrace: > > > > > at android.app.ActivityThread.access$2500(ActivityThread.java:115) > > > > at android.app.ActivityThread$H.handleMessage(ActivityThread.java: > > > > 1745) > > > > > In the first line, what does the number 2500 refer to? In addition, I > > > > couldn't find the function "access" in ActivityThread.java, and line > > > > 115 is just the beginning of the class. Can anyone help clarify this? > > > > Thanks!- 원본 텍스트 숨기기 - > > > > - 원본 텍스트 보기 - > > -- > Dianne Hackborn > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them.- 원본 텍스트 숨기기 - > > - 원본 텍스트 보기 - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
