**** BEGIN LOGGING AT Sun Jul 27 03:00:00 2014 Jul 27 03:03:08 Hey fellows how would one go about resolving synonymous namespace issues in android studio. I hava a support library that was built for a custom tablet and for the life of me cant get the project to compile. The problem is the support library utilizes the same namespaces as that standared sdk. Jul 27 03:04:02 so android studio does not know what file to properly import and pulls the default file from the sdk Jul 27 03:05:22 in eclipes the only way it worked was placeing the support library befor the standard sdk in the java build path Jul 27 03:07:33 Hi guys! Jul 27 03:09:27 Anyone with and thoughts? Jul 27 03:10:16 xMYTHICx, about what? (sorry - just came in) Jul 27 03:10:36 Hey fellows how would one go about resolving synonymous namespace issues in android studio. I hava a support library that was built for a custom tablet and for the life of me cant get the project to compile. The problem is the support library utilizes the same namespaces as that standared sdk. Jul 27 03:10:46 so android studio does not know what file to properly import and pulls the default file from the sdk Jul 27 03:10:55 in eclipes the only way it worked was placeing the support library befor the standard sdk in the java build path Jul 27 03:11:51 which Android Studio are you talking about? The one which is Eclipse based? Jul 27 03:11:59 or JetBrains? Jul 27 03:12:52 HikaruBG eclipsed based AS ? thats new one :) Jul 27 03:13:05 HikaruBG, Android .8.2 Jul 27 03:13:12 sorry guys - there was ANdroid IDE based on Eclipse Jul 27 03:13:31 wasn't it called also Android Studio? Jul 27 03:13:39 lol Jul 27 03:13:43 :D Jul 27 03:14:29 :D indeed :D Jul 27 03:14:38 OK got it Jul 27 03:14:43 Anyone knows how do I make an app for displaying the RSS Feed from my blog? Jul 27 03:15:55 So any thoughts on clashing namespaces Jul 27 03:16:22 xMYTHICx where did this support library come from ? if it collides with android sdk, fix the library :) Jul 27 03:16:39 if its THE support library, everything should work Jul 27 03:18:08 I do not have the source code. It is not THE support library. Simply a library that was built for my company. We have a custom tablet that was built specifaclly for us. and the support library came with it Jul 27 03:18:42 I have no way of accessing the source code :) Jul 27 03:19:06 xMYTHICx ok, well then if you have a jar, you can use jarjar maybe Jul 27 03:21:13 It seems I have tried and the only way to successfully get it to compile in android studio is by adding the following in build.gradle and completly removing any referance to the library eleswhere options.compilerArgs << '-Xbootclasspath/p:/path to jar’ Jul 27 03:21:56 this works although codesense does not and errors all over the place Jul 27 03:21:59 :) Jul 27 03:22:14 g00s, Thanks I will try that Jul 27 03:28:31 xMYTHICx: does this support library actually contain anything that you need? does your app still work/compile if you don't include it at all? Jul 27 03:29:13 It almost sounds like it's an android.jar Jul 27 03:29:52 oops he's gone Jul 27 03:29:56 ah, right Jul 27 03:57:00 reading this article http://developer.android.com/training/basics/firstapp/running-app.html it says do 'android avd' to bring up the android virtual device manager. OK. And it says create a virtual device. OK. it says do 'ant debug' OK. And here's the part that puzzles me. It says do 'ant install bin/MyFirstApp-debug.apk' Last time I did that, it installed to my device, and the instructions Jul 27 03:57:00 they give for installing to device also say to do that. So what controls whther it installs to virtual device or installs to actual device? Jul 27 04:00:48 garyserj: adb -e to send commands to an emulator, adb -d to send commands to a device Jul 27 04:01:24 otherwise, if you only have 1 device/emulator available, you can leave off the -d/-e Jul 27 04:20:46 i think you can also specify the target of adb commands without using target modifiers like that Jul 27 04:21:55 Yeah, but that's a pain :) Jul 27 04:22:31 and not usually needed, unless you have multiple devices or multiple emulators Jul 27 04:29:53 xMythic, trying going new module --> existing JAR AAR file Jul 27 04:30:05 then it'll be a new module in your project, then right click on your project Jul 27 04:30:50 goto module settings -> select your project, not the new module you just added -> dependencies tab -> add from dependency -> the new module / the jar you added Jul 27 04:31:07 oops he is gone doh Jul 27 04:31:07 he left awhile ago Jul 27 04:31:23 anyways that's how you use library projects, add them as new modules then add them as module dependency Jul 27 04:31:29 if you are stuck with a jar or aar file Jul 27 04:35:51 the graphical way to do it anyways Jul 27 04:47:55 Anyone know why I would be getting an NPE while trying to pop the backstack? (backstack should not be, and isn't as far as I can tell, empty.) Jul 27 04:48:27 because something is null Jul 27 04:51:24 zzxx: when you press the back button (arrow) you cause finish to be called on your activity, calling onPause/onStop/onDestroy which tears down the backstack and everything else. when you press the home button, you cause onPause to be called, but not onStop/onDestory Jul 27 04:51:51 i dont know if that helps but if you were expecting something to be there, when it's not, it might be due to the fact the home and back button do different things Jul 27 04:52:17 lasserix: Thank you. That is helpful information :) Jul 27 04:52:27 .....canvas on the other hand :/ Jul 27 04:52:28 :P Jul 27 04:52:35 vague question, vague answer Jul 27 04:52:38 heh Jul 27 04:52:44 my answer was a shot in the dark ;p Jul 27 04:53:12 It game me somewhere to start looking :) Jul 27 04:53:14 zzxx you might override abunch of the methods in activity and investigate how they called and in what order when you do basic user actions Jul 27 04:53:24 stacktrace gives you somewhere to start looking Jul 27 04:53:33 ^^canvs Jul 27 04:54:32 indeed. It is the first place I look. the stack trace did not include any of my own code though, only system calls, so I was a bit puzzled Jul 27 04:55:29 it should tell you the exact line causing the NPE Jul 27 04:56:26 if you don't get it, post your stacktrace&maybe some relevent code if you are able to Jul 27 05:05:42 I've found the issue. I had a typo in a FragmentManager.findFragmentByTag call which was causing me to try and remove a fragment "null" Jul 27 05:05:47 thanks for the help Jul 27 05:06:05 did it show in your stacktrace? Jul 27 05:09:16 You are welcome to take a look. http://pastie.org/9423994 I am unfamiliar with the android code where the trouble occured, thus me coming here for help :) I ended up finding it just by looking over my code and reasoning about the issue. Jul 27 05:10:35 that doesn't look like whole trace if you were removing or accessing a null object Jul 27 05:12:33 it is indeed all of it. not sure what else to say about that Jul 27 05:12:56 Hi, I need small help in wiring my custom view adapter with custom grid view Jul 27 05:13:24 bg123: please go ahead and ask your question :) Jul 27 05:13:43 zzxx: would need to see the full logcat, but glad you got it Jul 27 05:14:48 zzxx: do i need to specify width and height for my custom view that i'm returning from getView() in GridView adapter? Jul 27 05:15:49 bg123: Are you using a BaseAdapter? and you would define your layout parameters in your xml that getView inflates Jul 27 05:16:31 canvs2321: i'm using base adapter, but i havent created layout xml for my custom view, its just a class X extends View Jul 27 05:17:05 you inflate your layout in getView that gets populated with your adapter data Jul 27 05:17:09 paste your adapter Jul 27 05:17:15 or atleast what isn't working Jul 27 05:17:35 public View getView(int position, View convertView, ViewGroup parent) { Jul 27 05:17:36 if (convertView == null) { Jul 27 05:17:36 convertView = new Cell(mContext); Jul 27 05:17:36 } Jul 27 05:17:36 return convertView; Jul 27 05:17:39 and recycle views etc if convertView isn't null Jul 27 05:17:44 use pastebin Jul 27 05:17:53 what is Cell? Jul 27 05:18:19 Cell is just public class Cell extends View Jul 27 05:18:45 what tutorial are you following, or are you just winging this? Jul 27 05:18:55 is it a single view per entry? Jul 27 05:19:42 i'm not actually following any tutorial Jul 27 05:20:00 then how did you come up with this design? Jul 27 05:20:46 actually, i'm trying to create http://gorried.github.io/inverter/game.html this in android Jul 27 05:21:12 so, to represent cells in this game i've created that class Cell Jul 27 05:22:05 Well if convertView!=null you are recycling, how are you defining the data? is that your whole getView? Jul 27 05:22:07 canvs2321: I reintroduced the bug for your amusement. here is the entitre logcat for your review: http://fpaste.org/121156/43845814/ Jul 27 05:23:17 canvs2321: that is the whole getView(), the view itself dont show any data, it just changes its background color when user taps on it, thats it Jul 27 05:24:14 zzxx: yeah that stacktrace doesn't help show your code, but google does http://stackoverflow.com/questions/13393693/android-fragmentmanager-backstackrecord-run-throwing-nullpointerexception Jul 27 05:25:05 bg123: so you have an onItemClickListener? i just don't get why you are using a custom adapter if it doesn't do anything, what is the actual question? Jul 27 05:26:40 canvs2321: my question is that i cant see any items when the view is rendered Jul 27 05:28:03 bg123: unless you are changing entries bg colors upon click that is done in onItemClickListener, the adapter would help keep color settings if scrolling, otherwise, there isn't really a question here, as much as you need to rethink your design Jul 27 05:28:24 and not seeing anything when rendered is due to your bad adapter code Jul 27 05:28:58 you need to set the bgcolor in onItemClickListener&or when the view gets rendered in the getView Jul 27 05:29:20 you are doing nothing in the getView that does anything except create 1 Cell, cause the views are recycled Jul 27 05:29:39 so first view == new Cell, everything else just returns the recycled view Jul 27 05:30:25 canvs2321: i just want your view on how to implement this game http://gorried.github.io/inverter/game.html Jul 27 05:31:09 canvs2321: how would you suggest me to create the layout for that grid Jul 27 05:31:23 you have to implement an onItemClickListener that sets the data your adapter is using so your adapter can set backgrounds Jul 27 05:32:04 canvs2321: which layout would you suggest for laying out those views Jul 27 05:32:30 i don't understand the game on first&second look, so i don't know the logic, but your Gridview entries bgcolors will be set in getView based on what was clicked Jul 27 05:32:57 do you know what an adapter is? Jul 27 05:33:16 yes yes i know about adapter, recycled views Jul 27 05:33:33 no, adapter just displays your data Jul 27 05:33:40 where is your data? Jul 27 05:34:43 canvs2321: there is no actual data, only the background color information is there Jul 27 05:35:29 That is data Jul 27 05:35:35 you should read up a bit on it Jul 27 05:36:22 canvs2321: sure Jul 27 05:36:38 your adapter should read the data(bgcolor for each item) and set the color per position that is available Jul 27 05:37:16 or visible Jul 27 05:37:28 canvs2321: i would like you to comment on my code, do you have time to see? Only 3 classes are there Jul 27 05:39:11 not sure i can be much help without rewriting what you've done. Basically, if you have 4 Cells, your data will have 4 items related to positions 0-3, when your getView gets called, if convertView is null, create, then set bgcolor based on Position, if not null recycle convertView&set bgcolor based on Position Jul 27 05:40:17 canvs2321: thank you so much for your comments and time, I will read a bit more about it. Once again thanks.... :) Jul 27 05:40:42 just read up on using BaseAdapter, i'm sure there are a ton of examples that'll help you grasp what you want todo Jul 27 05:41:45 basically, your adapter is just a means to display your backing data, and your backing data is just something that you have set based on what you want shown Jul 27 05:42:51 canvs2321: ok, currently, i'm not doing anything in getView, so i need to set bgColor in getView appropriately and return the view, right? Jul 27 05:47:28 you need to define your data, 2x2 grid, you have 4 data items, onItemClickListener adjacent views set colors, call adapter.notifyDataSetChanged(); that'll update your 4 views bgcolors. your main logic is gonna be with clicking, then calling your adapter to update the colors Jul 27 05:48:23 What's 4.4W? API 20? Jul 27 05:48:33 it shows up as separate to L preview which is also API 20 Jul 27 05:48:40 W is for Wear devices, api 20 is the preview for L Jul 27 05:48:46 ohh that makes sense. Jul 27 05:49:09 canvs2321: got it! Jul 27 05:49:17 good :) Jul 27 06:15:15 Is there a way to change the colors in the project window in as? Jul 27 06:16:51 what do you mean? Jul 27 06:17:25 you use darkula theme? Jul 27 06:19:08 Hello. Anyone knows if android actually renders/draws the views that are set to GONE? Or are they drawn when they are set to VISIBLE? Jul 27 06:20:33 GONE == not rendered, INVISIBLE&VISIBLE are rendered Jul 27 06:23:17 but GONE views still take up memory right? Jul 27 06:23:41 nope Jul 27 06:23:49 they don't get rendered Jul 27 06:24:15 what's your real question? Jul 27 06:24:45 or atleast issue Jul 27 06:25:30 [VIEW][VIEW2] VIEW.setVisibility(View.GONE); [VIEW2] Jul 27 06:26:00 Well using an expListView and an adapter and 1st item has to have a special layout. Thinking which is better a layout for all items with specific items set to GONE, or manipulating the adapter Jul 27 06:26:39 You can always choose another layout without views your don't want based on your needs Jul 27 06:27:05 Already got the adapter to work properly by overriding getChildTypeCount = 2 and return appropriate type id in getChildType Jul 27 06:27:46 This answer suggests that GONE views do take up memory http://stackoverflow.com/a/17883768/3249477 Jul 27 06:27:50 the only issue you might have with a custom adapter is setting the view to GONE, shouldn't do alot of if/else etc... in getView Jul 27 06:28:09 don't do any logic in adapter getView, have it pre determined Jul 27 06:28:49 Not much of logic when i run single if statement and inflate specific layout if convertView is null Jul 27 06:29:40 if just an if statement to inflate then that is fine, but if inflating then doing if/else that is bad Jul 27 06:30:09 don't have any logic in getView, have it pre set Jul 27 06:30:09 Maybe code speaks better than me :P http://pastebin.com/pwfXUEQw Jul 27 06:30:56 that code looks fine, as views are recycled, you are only doing an if statement if null Jul 27 06:31:40 Yes i'm wondering if this would be better performance-wise than using a single layout with 2 buttons that are set to gone and made visible only if childPos == 0 Jul 27 06:31:52 but if convertView ==null then position is 0, so your if statement is kinda redundant Jul 27 06:33:02 Mmm i'm not sure how I can change that Jul 27 06:34:02 you have to remove it, if null it is position 0, if not then recycle and set accordinly Jul 27 06:34:08 accordingly? Jul 27 06:34:36 But it can be null on other positions too can't it? Jul 27 06:34:46 you'll still have to set your buttons no matter if null or not Jul 27 06:34:50 no Jul 27 06:34:53 they are recycled Jul 27 06:36:13 canvs2321, and what if i have multiple child's which have position 0 on the screen at the same time? :) Jul 27 06:36:57 you only have 1 position 0 Jul 27 06:37:11 your data is what fills the adapater Jul 27 06:38:18 String[] blah = new String[]{"1","2",3"}; position 0 is 1 Jul 27 06:38:23 hi guys! Jul 27 06:38:27 how hi? Jul 27 06:38:34 what about gals? Jul 27 06:38:42 what happens with the application if i switch to another app? Jul 27 06:39:00 hi guys and gals! :) Jul 27 06:39:01 haha Jul 27 06:39:12 canvs2321, i've just tried and 2 calls we're issued to the block where convertView==null and pos==0. Is that because you're wrong or because of my code? Jul 27 06:39:38 HikaruBG: onPause,onStop,onDestroy Jul 27 06:40:06 skulltower, position 0 == your first data entry Jul 27 06:40:07 what happens with an app when I switch to another app? is it sutomatically paused? Jul 27 06:40:11 or stopped? Jul 27 06:40:26 HikaruBG: just answered that Jul 27 06:40:35 and when the memory get available again Jul 27 06:40:38 canvs2321, btw i believe it's how it's supposed to be. As on a normal listview there are as many convertViews as fit on the screen. Jul 27 06:41:08 canvs2321, you said three options. which one? Jul 27 06:41:10 skulltower, your adapter only displays your data, but it reuses views upon multiple entries Jul 27 06:41:24 HikaruBG: it depends Jul 27 06:41:43 onPause for sure, onStop probably for sure, onDestroy maybe Jul 27 06:42:03 It re-uses views but not a single view! If i have multiple children which have position 0 on the screen at the same time there will be 2 convertViews. Jul 27 06:42:08 and when the memory is available again - onDestroy Only? Jul 27 06:42:32 skulltower, it calls getItem, etc...there is only 1 position 0- Jul 27 06:42:56 canvs2321, it's an expandable list view Jul 27 06:42:59 an array has 0-X, your adapter uses that for position Jul 27 06:43:02 don't matter Jul 27 06:43:24 your adapter is based of data Jul 27 06:43:52 Ok can you please edit my code so it inflates the 1st child only 1 time and then re-uses it? Jul 27 06:44:05 data as String[] Blah = new String[]{"1","2","3"}; position 0 is 1, position 1 is 2 etc Jul 27 06:44:41 canvs2321, Maybe i misunderstand you but we seem to be talking about completely different things :D I'm not sure how your array example helps here. Jul 27 06:45:03 because the adapter uses data(arrays) to fill the views Jul 27 06:45:28 But before it fills them, it has to create them. Jul 27 06:45:30 List bleh = new ArrayList(); bleh.add("1"); etc... Jul 27 06:45:46 no you create your data then set it to your adapter Jul 27 06:45:58 create the views i mean!! Jul 27 06:46:04 and upon chaning data your notifyDataSetChanged() on adapter Jul 27 06:46:41 skulltower you have to override getViewItemType, getViewItemTypeCount to enable multiple convert views to be passed into getview Jul 27 06:46:42 skulltower, you have your data then set the adapter to show those values Jul 27 06:46:56 by default you only get one Jul 27 06:47:05 canvs2321, I'm not talking about the data.. I'm talking about the views. Jul 27 06:47:12 lasserix, i've done that http://pastebin.com/QzJsPvf4 Jul 27 06:47:20 but your views are defined by your data Jul 27 06:47:23 :/ Jul 27 06:48:16 in getView, myData.get(position) then do what you want to your view Jul 27 06:48:44 view.gone -> view part of the hierarchy, but takes up no layout space view.invisible-> view part of the hiearchy, and laid out, but is not visible (takes up space) Jul 27 06:49:01 blah = myData.get(position); in getView myTextView.setText(blah.getWhatever); Jul 27 06:49:28 skulltower, how much data do you have? Jul 27 06:49:32 is there an upperbound? Jul 27 06:50:07 http://postimg.org/image/cs1ae235l/ Jul 27 06:50:08 tbh imho it is far better to simply define a static lay out, where you gone/visible views that you don't need, and bypass the adapter altogether if you can Jul 27 06:50:38 do you expanded views all look the same? Jul 27 06:50:52 anyways Jul 27 06:50:55 what's the problem you're having? Jul 27 06:51:55 Well canvs2321 is saying that i am using only 1 view for all the 1st children Jul 27 06:51:59 oh Jul 27 06:52:07 you should probably subclass listview Jul 27 06:52:12 and you special header Jul 27 06:52:16 as a static part of the listview Jul 27 06:52:23 err subclass a viewgroup Jul 27 06:52:29 like linearlayout, or relative layout Jul 27 06:53:25 what i'm saying is use your position of you data to set your layout Jul 27 06:53:35 since you say "Well using an expListView and an adapter and 1st item has to have a special layout. Thinking which is better a layout for all items with specific items set to GONE, or manipulating the adapter", you can think of the first one as a special header, and the rest as the actual list. ie, the first one is not part of the list Jul 27 06:54:23 lasserix, Yes that would probably be better but im too lazy to create custom views xD Jul 27 06:54:39 its easy.. you can do it in xml Jul 27 06:54:40 skulltower, show your data Jul 27 06:54:44 easier than this anyways Jul 27 06:54:49 btw, what does Ok can you please edit my code so it inflates the 1st child only 1 time and then re-uses it? this mean? Jul 27 06:55:11 canvs2321, consider that all my list is like in the image Jul 27 06:55:30 it's not Jul 27 06:56:29 it's simple, if i have data "header1", "1","2",3", "header2", "1" ,"2","3" you have to justify it in your adapter Jul 27 06:57:16 skulltower, is your code not working as expected? Jul 27 06:58:06 lasserix may be able to help you more thoroughly, i'm just straight to the point :) Jul 27 06:59:07 canvas heh i am just a little buzzed, so i see where you are going with this Jul 27 06:59:10 I'm trying to understand what canvs2321 said: "but if convertView ==null then position is 0, so your if statement is kinda redundant" Jul 27 06:59:23 looks like the code should work, you're just trying to explain why it does work ;p Jul 27 06:59:39 skulltower: the first time getview is called, is there any view inflated yet? Jul 27 06:59:53 which came first the chicken or the egg? Jul 27 07:00:07 in this case, the chicken cause you can reuse the egg ;p Jul 27 07:00:09 you have if convertView == null, if(position ==0) etc...., in the adapter views are recycled, so if position ==1 then it's not gonna be null....sooo Jul 27 07:00:45 The code does work, but i don't understand why canvs says 1st child view get's re-used. If i have 2 children visible which both have position 0 then they will both use different views Jul 27 07:01:05 they won't both be position 0 Jul 27 07:01:19 position is based on data, you can't have 2 0's Jul 27 07:01:21 childPosition, that is Jul 27 07:02:21 You are basically saying that adapter creates 1 view and then re-uses it for all the items. But that isn't so. It creates as many views as are needed to display the first page of the list. Then as you scroll the view that goes out of the screen gets re-used. Jul 27 07:02:23 once the first time getview is called inflates a view, it will be reused (unless viewItemTypeCount == mData.size()) Jul 27 07:02:26 arrays are 0 based, data is arrays Jul 27 07:03:02 skulltower, you are wong Jul 27 07:03:48 skulltower: the whole point of convertview being a part of the getView parameter arguement is that you DONT have to inflate new views each time Jul 27 07:03:52 do a Log.i() call to see if position 1 is reused or not Jul 27 07:04:18 if you don't use the viewholder /convertivew pattern and inflate a view for each position, then yes you are right, but that's not recomended Jul 27 07:04:28 lasserix, canvs2321 then why is this: http://pastebin.com/5GbWvJtc Jul 27 07:04:31 and it isn't what your code is doing Jul 27 07:06:02 something with your viewtype code is incorrect Jul 27 07:06:15 So this shouldn't be?? Jul 27 07:07:04 I've made multiple lists and they've all behaved in the same way. Create as many views as needed and then re-use them as you skip through the list Jul 27 07:07:11 skulltower: what adapter are you even using? post whole adapter Jul 27 07:09:47 ahh sorry you are right Jul 27 07:10:08 that's why i actually abandoned the listview and adapter and just wrote my own adapter that preallocates everything Jul 27 07:10:33 And i thought i was going mad xD Jul 27 07:11:21 How do you pre-allocate? Jul 27 07:12:31 ahh so basically you create a listview with say, 30 rows, put in a scrollview, then make an adapter (not related to base adapter) that basically iterates over a set and then binds the data of the set elements to the rows, hiding those it doesn't need Jul 27 07:12:56 you can then use pagination to iterate over very large sets, since at most ~10 rows are visible at once Jul 27 07:13:45 in this way you never inflate a row more than once, ever. tho this is very overkill and i did it as an expiriement since properly implemented listview/baseadapter is usually ways fast enough Jul 27 07:14:11 So you issue a single inflate for the whole list? >.> Jul 27 07:14:34 yeah when you create the first time, then just make visible / make gone on the visibility Jul 27 07:15:19 And you can display multiple rows that way? Jul 27 07:15:28 that was more complicated but yea Jul 27 07:15:29 at the same time i mean Jul 27 07:15:53 Ok. I'd like to go back to my original question :D Does a GONE view use up memory? Jul 27 07:16:06 its still part of the view hierarchy Jul 27 07:16:27 you're thinking remove view Jul 27 07:16:55 is my custom adapter a better choice than using multiple layouts with GONE views? Jul 27 07:17:10 the code you showed? Jul 27 07:17:13 Yes. Jul 27 07:17:25 your custom adapter is probably the better choice Jul 27 07:17:37 because properly implemented you're talking about 50-60 milliseconds Jul 27 07:17:49 ie, the difference in what you're trying to optimize is like 1 frame Jul 27 07:18:01 which really means if you are at that point, it's good enough Jul 27 07:18:10 xD that's.. something Jul 27 07:18:27 games try to achieve like optimal refresh rate of one frame every 16 milliseconds Jul 27 07:18:52 television is like 24 milliseconds for the illusion of continuos movement, "smooth animation" Jul 27 07:19:08 so really you could spend a lot of time worry ing about this or just implement it as recomended and move on to more important things Jul 27 07:19:14 so monitor refresh rate is similar? like mines 8ms or so Jul 27 07:19:19 *worrying about premature optimization Jul 27 07:19:34 note that one way to help accomplish smooth movement illusion is by motion blur. Jul 27 07:19:48 i believe past 30 hz or so it doesn't matter the eye can't distinguish Jul 27 07:20:06 this reduces the frame-to-frame differences, which reduces the perceivable impact from lower refresh rates. Jul 27 07:20:15 skulltower: as alankila mentioned, if you already have a properly implemented listview, instead of trying to reinvent its inflation methods, spend the time implementing a nice motion blur effect Jul 27 07:20:27 alankila, nice idea Jul 27 07:20:36 *reinvent inflation methods to shave off a few milliseconds Jul 27 07:21:21 anyway you absolutely can't afford stutter. I was just abstractly talking about how to deal with lower refresh rates than might be optimal Jul 27 07:23:47 the people dealing with VR headsets think that refresh rates to excess of 100 Hz may be required. It's a bit of a special case though. It's just that if object moves on screen, the eye tracks that smoothly and if the framerate isn't high enough the movement of eye will blur the object in motion inappropriately Jul 27 07:24:24 hehe alankila yeah probably cause your eyeballs are literally bootstrapped into the viewport ;p Jul 27 07:25:04 Umm maybe someone can shed some light on this one: https://drive.google.com/file/d/0B392C6uXO6ihVW5pbFZfUnFZcEU/edit?usp=sharing Jul 27 07:25:54 Basically i'm using a cursorloader that loads from a contentprovider with uses sqlitedatabase. But i don't think the problem is with loading the data. All is displayed on a listview with the help of cursoradapter Jul 27 07:26:14 However textviews with more text are lagging like hell. While the single line text views are okay. Jul 27 07:26:58 Well this is frustrating. This library is supposed to be on Maven Central, it even lists the gradle "compile .net.....@arr" for the file but I can't get it to work - doesn't find it and if I search for the Marven repo, the version listed in the readme isn't up there. Jul 27 07:28:13 for https://github.com/passy/Android-DirectoryChooser Jul 27 07:40:24 Time2303: http://search.maven.org/#search%7Cga%7C1%7Cnet.rdrei.android.dirchooser Jul 27 07:40:55 the repo talks about 2.1 and says it should be on Maven Central.. but it's just 1.0. >_> Jul 27 07:41:08 ah Jul 27 07:42:26 On https://oss.sonatype.org/#nexus-search;quick~dirchooser it shows however Jul 27 07:42:43 Yeah, I don't think the maven central repository hosts snapshots at all Jul 27 07:43:01 What's the difference? Jul 27 07:43:05 I'm guessing you'll have to add the sonatype repository to your project. I'm not sure how to do that :) Jul 27 07:44:00 I think sonatype place that maven central pulls from, but it's not maven central itself. Or something like that Jul 27 07:44:08 not really sure, tbh Jul 27 07:45:04 I pretty much blocked out the part of my memory dealing with trying to upload a project to sonatype/maven central :) Jul 27 07:45:24 skulltower: use systrace Jul 27 07:45:36 err Jul 27 07:45:39 systrace Jul 27 07:45:42 err traceview Jul 27 07:45:49 sysview? Jul 27 07:46:05 viewtrace? Jul 27 07:46:15 traceview Jul 27 07:46:35 it'll show you the durations of method execution Jul 27 07:46:41 viewsys. definitely viewsys Jul 27 07:47:08 sysviewtrace? Jul 27 07:47:20 oh no no its viewsystrace Jul 27 07:47:27 xD Jul 27 07:47:33 Time2303: I think a maven { url: https://oss.sonatype.org/content/repositories/snapshots/ } should do the trick Jul 27 07:47:34 traceview won't start says to use ddms Jul 27 07:47:43 JesusFreke: Thanks I'll give it a shot Jul 27 07:47:45 amd* Jul 27 07:47:49 in repositories in your build.gradle Jul 27 07:47:59 skulltower: you using AS or eclipse or? Jul 27 07:48:02 as Jul 27 07:48:15 http://tools.android.com/tips/traceview Jul 27 07:48:17 sorry, no : after url, I think Jul 27 07:49:04 Updating repositories Jul 27 07:55:22 JesusFreke: Thanks, it seems to work now Jul 27 07:55:27 lasserix, wow. this is a powerful tool Jul 27 07:55:29 nice :) Jul 27 08:01:05 How can I retrieve the fragment at specified position in a layout when they're added dynamically? Jul 27 08:14:12 Hi, did someone know a pictureViewer who accept directly JPEG pictures ? (as ByteArray or something else) ? Because the ImageView sucks, it need a Bitmap, and all the problem is here: I receive a video stream (multiples jpeg pictures), every pictures do around 30kO - 50kO, But ... When i want to show them on ImageView, I use a "Bitmap" class, and it convert the JPEG in Bitmap .. So when i watch the size i get something around 1.3mo (4*640*4 Jul 27 08:14:47 ImageView only accept Bitmap's-like [...] Jul 27 08:17:40 Any ideas please ? [...] If i have to made my own JpegViewer (with canvas + seting the color of every pixels) it's a "borring" work (i have to watch how is the jpeg file exactly inside [..] Jul 27 08:18:29 cyber37: you should clarify a few things in your mind. Jul 27 08:18:54 jpeg is really an encoding for an image matrix, meaning certain width and height of pixels defined in RGB colorspace. Jul 27 08:19:20 you should decode the jpeg to an optimal size for display by using the BitmapFactory's inSamp property Jul 27 08:19:24 then it takes no more memory than it has to Jul 27 08:19:47 additionally, you can upload the thing as a texture for GPU which can help you a bit further though the texture may have to have power-of-2 dimensions Jul 27 08:20:25 but your process could be as follows: read bitmap from file or whatever jpg you have, upload it to gpu, recycle bitmap, then use the texture ID for rendering. Jul 27 08:21:31 also be very careful about releasing bitmaps as soon as you don't need them anymore. For instance, if you change an image, you might want to release the old image before even touching the new jpeg data Jul 27 08:23:21 if user zooms into an image, consider decoding the jpeg stream again ata new inSampleSize setting and with bounds that are sufficient to display whatever is visible on screen. Do not decode the entire image at full resolution if you can avoid it. Jul 27 08:23:56 this sort of thing makes imageviews work for arbitrary sized jpeg images -- no matter what the resolution, if you only decode what you need and no more, it doesn't really matter. Jul 27 08:24:08 alankila, when i decodeinputstream with bitmapfactory Jul 27 08:24:21 The bitmap size is around 1.3 mo Jul 27 08:24:55 yeah that's actually a rather small image. I'm guessing you did 16-bit decode, so that's sqrt(700000) or so pixels at some dimension, not even 1000 Jul 27 08:26:36 but you are speaking about texture for GPU, what is that .? Something like openGL in android ? Jul 27 08:26:59 well there is graphics hardware on every android device, with dedicated memory set aside for application textures Jul 27 08:27:29 Did you have a "text" that i can type on google for watch that ? the name of that ? Jul 27 08:27:33 we can access it ? Jul 27 08:27:41 GLSurfaceView might be a way. Jul 27 08:27:47 it's just GLSL programming. Jul 27 08:27:59 I'm not quite understanding why you worry so much about mere 1.3 MB Jul 27 08:28:28 I'd understand if you said your bitmaps were 13 MB. That sort of thing is pushing the limits for what can still be made to work in practice. Jul 27 08:29:33 I receive a video stream, in standard java my parser is ok, and viewing OK Jul 27 08:29:47 In android i have big lattence, so i was doing "size test" Jul 27 08:30:00 I see the picture who comes is around 30ko -50ko/ pictures Jul 27 08:30:03 at 20FPS Jul 27 08:30:29 and when i show them it do 1.3 mo/pictures, and the FPS is MAYBE around 5 FPS (or less) Jul 27 08:31:16 And "MAYBE" it's because of that conversion to bitmap with 1.3M of Bytes Jul 27 08:31:27 OK. It might be cpu bound -- limits at decoding speed. You might try parallelizing to multiple cores if you can prove that jpeg decoding is the slow step for instance Jul 27 08:32:00 you might try setting inSampleSize=2 to drop the decoding cost to about 25 % Jul 27 08:32:06 see if that gets you 20 fps now Jul 27 08:32:28 this of course halves your image DPI so it could look ugly Jul 27 08:32:35 Has anyone (presumably not anyone here) tried developing hardware JVM coprocessors? Jul 27 08:32:46 That is - JVM CPU cores Jul 27 08:32:51 For android Jul 27 08:35:34 I've also written some java code to display images from camera viewfinder using just regular ImageIO crap and swing components Jul 27 08:35:52 it blows me away to see it run smoothly considering that I know how costly work it is Jul 27 08:36:41 but I did the ImageIO equivalent of inSampleSize to decode the image to nearest factor of 2 size to the target window (with image larger than target window) and then bilinearly interpolated it to screen Jul 27 08:36:51 this gives a smooth/filtered image at quite low cost Jul 27 08:39:04 Shh Android Studio, stop talking https://i.imgur.com/R3sNGqQ.jpg Jul 27 08:39:50 lol Jul 27 08:49:10 writing custom content provider is fun Jul 27 08:58:08 i'm watching for GLSurfaceView i come back latter (i stay online) Jul 27 08:58:31 note that this isn't that likely to help you... Jul 27 08:58:54 if your limiting step is the ability to decode jpegs, you aren't going to win anything from avoiding imageview and using some opengl programming instead Jul 27 08:59:15 you need to determine what you are limited by and then see what you can do to workaround that Jul 27 09:24:42 I want to implement LoaderCallbacks for a custom db table Jul 27 09:24:49 then store in listview, in ListFragment Jul 27 09:24:59 dunno where to start Jul 27 09:50:03 hello Jul 27 09:51:24 hey guys, i`m calculating the height of some views in onrestoreinstancestate by getmeasuredHeight. it works for all views but not for a linearlayout. i`m getting 54 but it should be rather 250........any advice? Jul 27 09:55:36 i think it is time for me to rewrite my app to use one activity and a bucketful of fragments instead of 4 activities Jul 27 09:56:05 iffa: what's the advantage/purpose of that? Jul 27 09:57:17 more complex layouts and i can keep everything in almost one place that way... and then i can use onPause/onResume to detect when my app isnt in the foreground :D Jul 27 09:57:59 hmm I see Jul 27 10:01:07