Android redraw view not working. Nov 15, 2023 · I tried upgrading Skia, but SkiaView.

Android redraw view not working I had a chance to reproduce it recently, and these what I have found out so far. I am currently using androidx. Jun 11, 2014 · Thanks to pskink I was able to create complete solutions so here is it. aging i'm trying to add new list in that linearlLayout not added. com/reference/android/view/View. My control: Feb 12, 2010 · Once again: notifyDataSetChanged() does not work at least not for use practices which are recomended (read not deprecated). I believe this is because Android will only redraw the TextView itself rather than all the parent views as well, meaning my overridden dispatchDraw() method does not get called. After Jul 24, 2013 · notifyDataSetChanged() will redraw all views in your adapter. 0. Jan 6, 2012 · While you are correct that invalidate() does not happen immediately, it is the safest and best way to encourage a redraw. I mean I just want to redraw chart every 7 second Feb 12, 2010 · Once again: notifyDataSetChanged() does not work at least not for use practices which are recomended (read not deprecated). 4, the ListView shows the old sections while fast scrolling: So, when the user changed the sorting to Z-A, the ListView still shows this sections-overlay in order A-Z when fast scrolling. To strictly answer the question: Use invalidate (): public void invalidate () Since: API Level 1. In my case, I wanted an image refresh on locale update but, apparently, it seems that, since the resId does not change, the ImageView just disregards your request, not checking if the resource itself has changed. If use listview, cursor adapter and content provider you might try something along the lines: gettLoaderManager(). Jun 29, 2015 · Clear grid view and regenerate it in android. When I click on the button I want to hide a view (another button) that is loaded in the FrameLayout. Apr 23, 2013 · Hi Triode, I load all the database values in the screen and the activity is not crashing. Again, please let me know if this is unsafe or a bad practice and if possible a working alternative. When you have multiple views on top of each other, calling invalidate() on one view will redraw all those views. There are similarities, of course, but Android specifically designed itself so that as little as possible could completely interrupt the UI, because on a small device, the User must know that SOMETHING is going on Feb 9, 2011 · I have my class implements Drawable. View has two very important methods: invalidate and requestLayout, which are often used for View redrawing and updating. getControl('SectionedTable0'); container2. java. In my case I was invalidating a container (a ConstraintLayout) but the view inside it didn't get redrawn until I called postInvalidate() (from a service thread) directly on the view. Jan 25, 2022 · If there's no content in paging data, i'm showing empty state view. Is there a way to do this as I have attempted to detach and attach the view again but it does not change view when onCreateView is recalled where the binding is set. So what you have to do is setup Drawable. The Mar 15, 2019 · I am having an annoying issue on RecyclerView, that it is getting its data properly, but the view won't redraw it self. When i press send button ı must update View. You are first using GONE and then INVISIBLE on the same view. You can read more here(http://developer. tried invalidate(); and this. GONE makes the view invisible without the view taking up space in the layout. Aug 9, 2022 · Hi. In my case, I had not, and the definition of areContentsTheSame only checked one of Sep 16, 2023 · I tested this on android only. Jan 25, 2011 · OK, I've established that the calls to invalidate() are causing all of the views to be redrawn, including view 0. Hope I have not missed anything blatantly obvious. But it will be worked when directly using setContentView(PuzzleView) in main class. LayoutParams) view1. When you call notifyDataChanged, it will update Aug 23, 2014 · However, if I remove the character in the same method that I create and share the image, the app crashes because it didn't get a chance to redraw the view first. View. However the image does not immediately show up. This is not a good idea to keep your grid view updated, if you update in that way it would cost a lot of time and memory. I mean I just want to redraw chart every 7 second Sep 16, 2023 · I tested this on android only. html), but: "To force a view to draw, call invalidate(). The code snippet I'm using is as follows: let container2 = context. 5. invalidate immediately redrawing the screen in my android game 1 When invalidate method called on an array of Views, the first View is not redrawn Jan 25, 2011 · OK, I've established that the calls to invalidate() are causing all of the views to be redrawn, including view 0. Apr 9, 2018 · This function (potentially) does not do what it says on the label: it does not compare the contents of the two items - unless you have overridden the equals() function in the Artist class. 1. public class ItemFragment extends ListFragment { private DatabaseHandler dbHelper; private static final String TITLE = "Items"; private static Feb 13, 2018 · i'm struggling with this for a while, not sure if because almost 2 years of absence in Android DEV or my stupidity, I've tried everything and just cannot redraw my screen even if invalidate() is happening. It just saved me some hours of confusion with regards to ImageView refresh. id. Is there a way to make the redraw happen immediately? Dec 18, 2024 · Hello SAP Community, I'm currently working on an MDK (Mobile Development Kit) application and facing an issue with redrawing a sectioned table on an Android device. Showing information in a list, or a set of First, the invalidate() call will be propagated back to the root of the view hierarchy. 3. ) and you didn't know whether this view will be placed inside other View that can intercept touch events or the view structure is even more difficult. Jan 6, 2012 · Not because its not a valid test, but because the way the Android system draws is different from the way a lot of systems draw. When invalidate() is called on a view, it redraws anything that lies in the dirty region. Setting a variable inside the View will not invoke a draw on the View. This means that the redraw will be performed only when the current code has all been executed (in this case, the for cycle). As you can see previousTotalItemCount set to 0 first. Sep 30, 2013 · I'm trying to figure out the optimization for my custom view. Avoid graphical glitches by modifying specific ViewHolder items without redrawing them. invalidate()); or. I tried fragment. So for now I'll be using onCreate(null) to refresh my view when I update data. When page is loaded first time, control is drawn with empty progress, when I navigate away to another page and back, progress is drawn properly. I have looked over this site loads and found nothing but "use notifyDataSetChanged()" which doesn't work. – Katherine99 View. Therefore View. topMargin = 200; view1. i want the linear layout to redraw the new function requested by the user everytime the user clicks the draw button. GridView reuses views by passing them to getView() in convertView. Then I have a linear layout for other views including swipe refresh layout and recycler view: &lt;?xml version=&quot;1. LayoutParams params = (ConstraintLayout. <?xml version="1. 195. I also tried to call init with context, but then the whole View disappeared and did not redraw. fun fetchItems(): Flow<List<ItemEntity>> If I kill the app and restart it, I can see the new created item. Jul 4, 2016 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. invalidate() but this is not working in my app. note: if i'm without remove view added previousList + currentList added. Android - Removing Item May 13, 2015 · The issue is in your getView() function. postInvalidate(); Also note that redrawing a container might not redraw all of its views. 3, but stopped working in 4. getPageProxy(). items ShowItems(items) // <--- this is not called } this is the repository fun. But as I call refresh on the list and I want to populate Adapter with new (totally different) list, after calling viewPager. testCanvass[0] appears to be modified successfully within the scope of updateViews, but once the updateViews method completes execution and ends, the Jul 13, 2016 · You can refresh the ListView with a call to the notifyDataSetChanged() method of your adapter. adding the layout below. After setting the image, I then call postinvalidate(). when you have multiple rows and each one updates independently from the others. 6529 ever Apr 25, 2013 · The problem I am having is that the ArrayAdapter does not refresh on resume. When the screen is rotated, its fine as onCreateView() is ran again, but I need it to refresh onResume. please suggest correct way If I have a member variable inside the MyView that stores the text, and create a public setter for it, then just calling that method causes the MyView to redraw itself. I need to redraw it periodicaly to get some "blink" effect. Forms dependency to 2. display empty data. My control: Mar 16, 2013 · Working with simple shapes directly on a View would be ideal for me. So when you got two views: A above B, and you call B. Bounds in some place in the code，like that： Mar 28, 2014 · Basically I have a drawer with a button in it. I am using timer. In 4. If you want to create custom view in which have to be your custom drawings for different touch states (pressed, selected, focused etc. 0. May 30, 2017 · In Android Cells are not staggered in using RecyclerView with StaggeredGridLayoutManager Hot Network Questions Do the concentration rules favor machine gun casters? I working on messaging platform like whatsup. onCreate Feb 7, 2024 · Hopefully I'm not to late but I encountered the same problem and after trying out many different approaches I finally came to this working solution. uiState. I previously had a problem in gridview which i solved myself i am posting the link because the code is same apart from the new functionality added in contextual task i dont know how to get the position of the img that i click so i can pass it to next acitvity the remaining code is as follow Feb 25, 2012 · I only redraw a part off the View, but everything else is black. VISIBLE); But the view doesn't become visible. Since, the code is executed sequentially, first the view becomes GONE then it is overridden by the INVISIBLE type still taking up space. invalidate() doesn't working. I have tried using layout. When ı send message ı must update the screen because ı am getting data in db. Sep 22, 2014 · I can't recognise what is it's problem. redraw(); T Jul 25, 2013 · If my ReflectingLayout contains, say, a TextView and I change the text content of that TextView the reflection effect is not updating. recyclerview:recyclerview:1. You could try to call it after scrollTo, even though that should usually be called if the underlying dataset changed to refresh the view items. List view not getting refreshed. I can see in Logs that the adapter's content is getting changed, but the views only refresh when I click on them Mar 19, 2015 · I found the problem. schedule to schedule invalidateSelf() but nothing happend. If the view is visible, onDraw (Canvas) will be called at some point in the future. 194, bu Jan 29, 2014 · The graph is drawn on a linear layout using some library. To do this, I think you should clear the data of recycler view as soon as you try to refresh it and add new items only when you get actual data. invalidate(); Jan 25, 2012 · But the invalidate function in PuzzleView is not working. 0, when using Hardware acceleration, the drawing of views is recorded and stored at the GPU. Additionally it is presented as a workaround. invalidate(); Nov 15, 2023 · Description I tried upgrading Skia, but SkiaView. Is this a flaw in the Android API? Have been searching here and Google for several hours now. Jun 21, 2012 · This wouldn't work because invalidate() only schedules a redraw in the main thread event queue. onDraw will be called and record to the GPU, but A. I created control with GraphicsView chart that takes progress property. (I am using kotlin extension) I have a fragment that inflates an xml layout. getLayoutParams(); params. However, these views won't necessarily already have the correct images loaded into them, they are views that were previously being used for displaying different cells in the grid at different positions. Feb 28, 2021 · In my recyclerview, I get data from internet and when pulled down it refreshes the data but during the process of retrieving the information from internet, the refresh icon seems to freeze. To strictly answer the question: Use invalidate (): public void invalidate () Since: API Level 1. My question is basically the same as How to force a view to redraw immediately before the next line of code is executed , but unlike this question I don't need to change background May 26, 2020 · I have custom ViewPager and PagerAdapter which is loading items inside instantiateItem. the problem is that even the database gets updated, the UI doesn not refresh with the new values. I tried to draw the onDraw function differently every time, but it doesn't change after the first drawing. So the Rect dirty is Rect(0,0,0,0), if you not setup Drawable. This should use "Pull to refresh". Maybe calling the invalidate() method of the view will help. " Note, also that you can invalidate only parts of a view Dec 14, 2014 · View#invalidate tells the system to redraw (via onDraw) the view as soon as the main thread goes idle. my_view); myView. invalidate(); with no success Jan 5, 2013 · runOnUiThread(() -> view. Apr 3, 2016 · I am currently digging into Xamarin Studio and am creating a simple sample app with a list view. During the propagation, the system determines the dirty area that needs to be redrawn. May 23, 2021 · Have you ever faced the problem in the android studio that it is not showing the layout preview while you are constructing a layout for your project? If yes, then this article will help you to solve this problem. Issue is, i'm not able to do swipe-to-refesh in LazyVerticalGrid if there's no data, but same is working in LazyColumn (both case has NoContentView shown). I googled but ı can not exact. From the docs for invalidate() This must be called from a UI thread. Jun 28, 2020 · The recycler view item clicks not working if I put recycler view inside swipe refresh layout. The download is performed in a thread and in that same thread I also set an image view with the newly downloaded image. For a simple rotation a Tween Animation would be better suited. Following is my Custom GifLoader java code Jun 27, 2011 · when a user selects a menu option, I catch it in onMenuItemSelected and then call findViewById(R. RecyclerView is not null. Try Teams for free Explore Teams Apr 13, 2018 · I want when I refresh recycler view if internet is available my list should be refresh again if internet is not available my recycler view should be null or empty due to refresh. Cause an invalidate to happen on a subsequent cycle through the event loop. Jun 25, 2021 · I have a layout with navigation view with drawer layout as parent. I'm wondering if the calling to View. If you want to handle drawing outside of updates, Android provides a way to do that with the SurfaceHolder class. I wanted to force Drawable to update when progress changes, but it doesn't work properly. That is, calling invalidate schedules your view to be redrawn after all other immediate work has finished. below is code snipet : Jan 24, 2013 · My ListFragment code . private class DrawableI Mar 31, 2014 · Android : Refresh ListView not working. From android 3. I already tried this approach but nothing happens. Apr 10, 2014 · When you are not on the main Thread you need to use postInvalidate() on the View instead of invalidate() From the docs. Paging is working fine with compose and collectAsLazyPagingItems(). Below I include the XML code for the drawer. 0&quot; enc Oct 5, 2024 · The other elements of the fragment get updated, only listview and gridview that don't. redraw() doesn't seem to work on Android. invalidate, B. the place for the view is just empty, but taken. 0-alpha01. To call from a non-UI thread, call postInvalidate (). Mar 12, 2018 · I am not exactly sure why setY() doesn't also update the second view, but you can work around it by setting the first view's top margin instead of calling setY(): ConstraintLayout. adapter?. setVisibility(View. recreate() and I have already tried: View myView = (View)findViewById(R. onDraw will not be called because it's already recorded! Oct 25, 2015 · No it's not possible (in the normal sense). I think this might be work with a view group , but not a view. Nov 15, 2023 · I tried upgrading Skia, but SkiaView. please help . Is there a way to change the view bindings and update the view. Wrap the WebView inside grid like this: May 18, 2012 · If you implement a custom view, you will need to call invalidate() whenever the backing model changes and you need to redraw your view. Jul 31, 2012 · I also noticed that when debugging with hierarchy viewer, selecting a view will always make it reappear, apparently because hierarchy viewer forces the selected view to redraw itself. view. Jan 15, 2019 · Update recycler view content without refreshing the data. I already updated the Xamarin. e. I tried also to call gardenCalendar. Thank you both for this. But when you refresh the list view it takes previous value. I DO NOT want to use Activity. In my onCreate method I created a new instance of an AsyncTask to retrieve latitude and longitude from Google servers via JSON. 4. Not sure I have a fragment that inflates an xml layout. May 6, 2013 · I am working on grid view and i am new in android. If you have a chance to look at getView method you will see that convertView is created just once. setLayoutParams(params); Jul 18, 2016 · Whenever I do background work, I set GIF View visibility to ON and set its visibility to gone when work is done. Redraw View Android. It can also be used to create simple animations, where you change state, then call invalidate(), change state again, etc. 4. android. In my android app, I download an image from the cloud. The propagation will eventually reach ViewRootImpl. – Opiatefuchs Commented Sep 23, 2015 at 10:53 Jan 25, 2017 · You should not call invalidateViews and setAdapter to refresh your grid view. Android: can't refresh my listview. restartLoader(). notifyDataSetChanged(), PagerAdapter stops working properly and those items are blank pages Dec 28, 2013 · The above code works great up to Android 4. testCanvass[0] appears to be modified successfully within the scope of updateViews, but once the updateViews method completes execution and ends, the I working on messaging platform like whatsup. So solution is reset it's value when you first refresh with SwipeRefresh. Ex. It works fine up to version 1. GONE means only, that the view is not taking any space in the layout, INVISBLE means, the view takes space eg. getView(). I know that can be done by setContentView but for a fragment this does not work as it needs to inflate the view. I have successfully detach and attach current fragment, but drawer items are not translated. Remove item from GridView. VISIBLE) forces the Android framework to update the view visibility (<- forcing the view to redraw) even if the view is already visible. When there's some data, swipe-to-refresh is working. As you can see from the above sentence, the invalidate method will execute the draw process and redraw the View tree. Invalidate the whole view. My requirement is to update the text size on all my views inside my fragment when my Activity is resumed. invalidate(); with no luck. Why isn't view. I googled but ı can not exact Jul 24, 2013 · notifyDataSetChanged() will redraw all views in your adapter. Auto refresh not working in gridview after delete image. xyz). Oct 19, 2014 · I want to display a Google Map on half screen of my profile view. INVISIBLE makes the view just invisible still taking up space. Bounds. Aug 9, 2022 · You can see, only the numbers changed in the Bars, but nothing happens, the View has the old values and did not redraw. Feb 5, 2022 · and here the Compose view @Composable fun ItemList( viewModel: ItemListViewModel, navController: NavController ) { val items = viewModel. Ask Question Asked 10 years, 11 months ago. 194, but there is a problem starting with version 1. That is the main class xml that contains view doesn't refresh. A neat trick if you want to redraw only one view from your adapter is to call getView manually for it if its position is visible - i. Here's some code: GameActivity. Use this to invalidate the View from a non-UI thread. It is working fine if I initialize it for the first time with set list of items. In fact, neither does the view system know nor care about internal variables. This must be called from a UI thread. One way is that I create a new GraphView instance in the loop which should be final but I don't want to redraw all my chart every time because every time it draw it first it move to right for a second and then expand and place in the proper position. 0" encoding="utf-8&quot;?&gt; &lt;androidx. I could not make this work programmatically though; invalidating the list view, or the entire view pager even, had no effect. The true cause of the problem appears to be that the changes made to testCanvass[0] within updateViews are not "sticking", i. I want to click a button (a filter) and then fire again the network request and refresh the UI but it's not working. Jul 6, 2016 · My target is do redraw view on language change. . Aug 7, 2012 · In this Gallery every item i'm called updateDetails() method remove working fine. I'm stuck in this same situation. notifyDataSetChanged(); that also not working. If four items are visible and if you refresh with SwipeRefresh, the value of previousTotalItemCount would be 4 but it should be 0. ibvlru fup vkasa pjk mpjltx nwqgt auzkzgp olqp zcxbwl kavjla vcdnfw hnbqkrb wdws czslfz pehukr