android - What is the reason of designing an onAnimationCancel() in Animator.AnimatorListener? -



android - What is the reason of designing an onAnimationCancel() in Animator.AnimatorListener? -

android sdk animator shows:

public void cancel ()

cancels animation. unlike end(), cancel() causes animation stop in tracks, sending onanimationcancel(animator) listeners, followed onanimationend(animator) message.

to phone call method when animation not cancel. here sample aosp`s deskclock：

rotateanimatory.addlistener(new animatorlisteneradapter() { private boolean miscanceled = false; @override public void onanimationcancel(animator animation) { miscanceled = true; } @override public void onanimationend(animator animation) { if (!miscanceled) { view.setrotation(0); } view.setlayertype(view.layer_type_none, null); } });

onanimationcancel() set miscanceled flag, work done in onanimationend(). combine end status , cancel status, there @ 3 type of work need done in cases:

a), cancel & end. these work can live in **onanimationend()** b), cancel &!end. these live in **onanimationcancel()** c), !cancel & end. these annoying.

for c), have involve flag miscanceled.

i search through aosp apps , have not find benefit on making separate method of onanimationcancel(). of them "do nothing" or duplicate of onanimationend() codes.

why not merge cancel flag onanimaitonend:

abstract void onanimationend(animator animation, boolean canceled)

imop, more elegant & lite weight.

what reason of designing onanimationcancel() in animator.animatorlistener?

android animation

Comments

Post a Comment

Popular posts from this blog

Delphi change the assembly code of a running process -

Delphi change the assembly code of a running process - i'm trying alter address 00741fa5 has push test.009e721c . alter push test.009e71c8 . procedure callback; asm force $9e71c8 end; procedure tform2.btn1click(sender: tobject); var ppid :dword; pprocess : cardinal; begin getwindowthreadprocessid(findwindow(nil,pchar('test')), @ppid); pprocess := openprocess(process_all_access, false, ppid); injectasm(pprocess, $741fa5, 10, integer(@callback), 0); end; here injectasm function (with error checking) function injectasm(process: longword; injectaddress, injectsize, codeaddress, codesize : integer): pointer; var csize, rsize : integer; replaced : array of byte; jmp : array [0..4] of byte; jmpaddress : integer; nopv : byte; : integer; nbr: ulong_ptr; begin //injectsize must equal or greater 5, because need space our //(far) jmp wwxxyyzz instruction //if there's no space, inject in place of few instructions if injectsize ...
Read more

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) -

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) - hello have problem hibernate , jackson. have 2 pojos @entity @table(name = "users") public class user implements serializable { static final long serialversionuid = 4235637833262722256l; @id @generatedvalue private int id; @column(name = "creation_date") private date creationdate; @column(name = "first_name") private string firstname; @column(name = "last_name") private string lastname; @version @column(name = "version") private int version; @column(name = "e_mail") private string email; @column(name = "enabled") private boolean enabled; @column(name = "login") private string login; @column(name = "password") private string password; @jsonmanagedreference("role") @onetomany(mappedby = "user", cascade = cascadetype.all,fetch = fetchtyp...
Read more

C++ 11 "class" keyword -

C++ 11 "class" keyword - i've started using c++ 11 little bit more , have few questions on special uses of class keyword. know it's used declare class, there's 2 instances have seen don't understand: method<class t>(); and class class_name *var; why precede typename keyword class in first example, , keyword pointer in sec example? that known elaborated type specifier , necessary when class name "shadowed" or "hidden" , need explicit. class t { }; // love of god don't t t; t t2; if compiler smart, give these warnings: main.cpp:15:5: error: must utilize 'class' tag refer type 't' in scope t t2; ^ class main.cpp:14:7: note: class 't' hidden non-type declaration of 't' here t t; ^ if class not defined, deed forwards declaration. for example: template <typename t> void method() { using type = typename t::value_type; } method...
Read more