android - Get child view inside a Listview Adapter -

-

inside getview method want specific child view. know adapter holds several items, doing calling getcount:

getcount();

according javadoc: 

public abstract int getcount ()  added in api level 1 how many items in data set represented adapter.

now in getview method:

public view getview(final int position, view convertview, viewgroup parent) {     view lastaddeditem = parent.getchildat(getcount()-1);    if(lastaddeditem == null)  {      log.w("listadapter", "view null");    }  }

this message appears in logcat, means view try grab null.

i've tried this:

view lastaddeditem = parent.getchildat(parent.getchildcount()-1);

so how can grab specific view viewgroup object?

i know adapter holds several items, doing calling getcount:

yes does, getcount()(returning items in adapter) method of adapter has nothing getting children of listview getchildat()(where should use getchildcount() return views present in viewgroup).

lastaddeditem = parent.getchildat(parent.getchildcount()-1);

this should return non-null view, last view returned getview() method.

i want animate specific view in viewgroup

if going animate list row(or part of row) when becomes visible register scroll listener listview , start animation there when target view appearing on screen.


Comments

Post a Comment

Popular posts from this blog

ruby - Trying to change last to "x"s to 23 -

-
i have been playing around irb , have string looks this: irb(main):072:0> puts ["[\"4354 5432 5432 xxxxx\", \"6547 6547 8543 xxxxx\", \"2344 6543 6674 xxxxx\", \"2346 6236 7543 xxxxx\", \"1273 5585 5587 xxxxx\"]"] => nil irb(main):073:0> what want gsub last 2 "x" s of each 17 digit combination, 23 . what i've tried far (i've been using rubular): a.gsub(/\d[x]/,"23") <= grabs "x" s i'm close a.gsub(/\w[x{2}]/,"23") <= grabs "x" s grabs two digits each combination. is there easier way i'm not understanding? a.gsub(/\d{4} \d{4} \d{4} xxx\kxx/, '23') \d{4} = 4 digits what \k drop matched far. can use don't replace entire number, still able validate have in desired format.
Read more

jquery - Clone last and append item to closest class -

-
this bare-bones code on page: <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <di...
Read more

css - Can I use the :after pseudo-element on an input field? -

-
i trying use :after css pseudo-element on input field, not work. if use span , works ok. <style type="text/css"> .mystyle:after {content:url(smiley.gif);} .mystyle {color:red;} </style> this works (puts smiley after "buu!" , before "some more") <span class="mystyle">buuu!</span>a more this not work - colors somevalue in red, there no smiley. <input class="mystyle" type="text" value="somevalue"> what doing wrong? should use pseudo-selector? note: cannot add span around input , because being generated third-party control. :after , :before not supported in internet explorer 7 , under, on elements. it's not meant used on replaced elements such form elements (inputs) , image elements . in other words it's impossible pure css. however if using jquery can use $(".mystyle").after("add smiley here"); api docs on .after to ...
Read more