Android redraw view not working. 35; asked Oct 4, 2018 at 12:49.

Android redraw view not working 35; asked Oct 4, 2018 at 12:49. (Android) Layout won't redraw after setVisibility(view. Since it is necessary to redraw, you must first inherit the View class. public class ContactsAdapter extends In my custom View, I'm drawing a rectangle with an alpha of 0. I expect to see the content of my view change from A to B to C to D. DrawerLayout xmlns:android="http Inspired by @omid-jafarinezhad, I need to use smoothScrollToPosition, but I still need it instant scroll to the end because it will looks weird if keep scrolling many items slowly. Refresh is, literally, an Invalidate followed by an Update. Modified 4 years, 9 months ago. VISIBLE) forces the Android framework to update the view visibility (<- forcing the view to redraw) even if the view is already visible. This issue is directly related to CSS3 Filters as removing them makes the position fixed work correctly. To achieve a similar effect, we can attach click events within the ViewHolder within our adapter:. We have detected you are using a browser version older than Internet Explorer 7. Force redraw of AI features where you work: search, IDE, and chat. e. 5. Please consider using Canvas instead. For example the Camera application uses this attribute because it the camera preview screen mustn't be LayoutExtensions. 0, when using Hardware acceleration, the drawing of views is recorded and stored at the GPU. VISIBLE) call recyclerView. notifyDataSetChanged() is not for redrawing elements, it is for notifying the adapter, that the elements have changed in some way, for example there are more elements, or their data is set from an other class etc. On the click I want the popup window to be anchored to the top-left corner of the view that was clicked and be shown on top. Does not work on iOS, although the added persons are in the collection as they should. This is inconvenient. rawQuery( "SELECT * FROM ssnt WHERE mid = 1000" ); //optional, initial query adapter. getId()); I think android draw the view just like canvas in j2me, all the draw code is not draw directly to hardware ( screen ), it just draw to a buffer or drawable or something. This ClientData is used as target for data table to show data. Each touch event follows the pattern of (simplified example): Activity. You can also do a manual invalidate call ever x ms like so /** * Due to bug in 4. 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. unlockCanvasAndPost(c); View has two very important methods: invalidate and requestLayout, which are often used for View redrawing and updating. Then it dawned on me: The Refresh method is virtual. An example of when a custom view would call it is when a text or background color property has changed. hows. Draw circle when touched and when touch is removed in a custom view. I have a problem redrawing the view. in kotlin i called layout directly By Id i. Collectives™ on Stack Overflow Listview in android did not refresh the view until dragged. onTouchEvent() ViewGroup. Teams. drawable. notifyDataSetChanged(). restore(). You need Keep us posted, and I'm sure you'll find the solution! Android does NOT refresh layout of views with "wrap_content" once it has been displayed. onConfigurationChanged. e. setVisibility not working before Activity change. invalidate, B. scrollToPosition(position); new Handler(). This bothered me because I was positive that I'd observed a difference before. The RecyclerView does not pick up on this layout change, although I call forceLayout on the ImageView, and the RecyclerView is initialized with setHasFixedSize(false). (currently "android:switcher:" + containerId + ":" + i) Then the way to use it is after getting the container: ViewPager viewPager = (ViewPager) view. This works well for 90% items. Refreshing custom view every second after cclicking button in Kotlin. us)}; Just to complement the other answers as I don't think anyone mentioned this here: notifyDataSetChanged() should be executed on the main thread (other notify<Something> methods of RecyclerView. When a new view is added to a ViewGroup at runtime:. onTouchEvent() Activity. Timer not working in Android when calling invalidate() 2. tried invalidate(); and this. Edit. KTab, as the XML shown below, I have a FrameLayout on top and my custom view at the bottom. Force redraw of custom view Update the current view . 0. invalidate() does not seem to call View. Right-click the view and select Redraw view. testCanvass[0] appears to be modified successfully within the scope of updateViews, but once the updateViews method completes Here I go answering my own question with a hackaround that I've settled on. Try Teams for free Android has to redraw the screen when you add a new Phase 1: Birth and Setup (Creation) In this phase, our CustomView is born and gets ready to show off its powers. getHeight(); refreshDrawableState(); } I think this might be work with a view group , but not a view. When it does not redraw itself after invalidate() has been called, I need to scroll the ListView in order to get the desired redraw. support. 1st and 2nd connected with red line. drawRect(getLeft(), getTop(), getright() , getBottom() ,paint); I tested this on android only. So, a "GONE" view cannot come back. If the view already has been measured and laid out in a parent-view, Guy's answer may screw up your Activity's layout. tech/p/recommended. When an image is used in android and it is assigned it actually converts the image into a bitmap, and depending on certain parameters being size and various other factors, it can fail, which would result in your image being converted and being returned as null due to some Slider is designed to take all width available, same as any view with Modifier. setVisibility(View. cs's GetDesiredSizeFromHandler() which uses the widthConstraint & heightConstaint values (since I have a form that loads a DataGridView. Remove the visibility gone in the xml and handle the visibility fully in the adapter class. ScrollView doesn't scroll in layout? 0. I am new to android and i am using viewpager for the first time in my app and i am suffering from very strange behavior in my app that is i am using viewpager with three fragments ( TrackFragment , AlbumFragment , ArtistFragment ) and when i swip page from TrackFragment to AlbumFragment and again come back to TrackFragment it becomes blank As you discovered, the issue is visibility. Forms (VS for Mac 2019) and it works fine in both platforms, but the same solution when developed in . Is there a way how to force this ViewPager to reload/re-instantiate its views in case that they are no longer valid or needs to be refreshed? I tried to call notifyDataSetChanged() on its adapter but this does not invoke instantiateItem() method again. app "your. mydomain. liveData. I know that can be done by setContentView but for a fragment this does not work as it needs to inflate the view. View. Removing the grid and the Graphics view will begin to update. adapter. On MainPage. canvas. The solutions proposed by people in this post works or not mainly depending on the Android version of your device 1,886 likes, 45 comments - dbzsenpai on June 3, 2023: "android twins redraw!! not my best work but oh well, still wanted to post 😭💙 . Though grayed in color, disabled views can still get focus and I know it is a workaround because it will stop work if the way the framework is creating the tags change. The problem(s) The CellPainting event does not for form load. setEnabled(false) does not work quite right in android, in the following ways: Disable parent view does not automatically disable child views. requestLayout() or listView1. After I get a new List of products, I tried to: Update the ArrayList from the fragment where recyclerView is created, set new data to adapter, and then call adapter. I've found a workaround to refresh the view inside my fragment. Android view redraw. . Still, it sounds quite strange that to have a list scroll to a specific element one must directly fiddle with focus. Teams When I change this text parts from another fragent I want the first fragment to redraw it's views. All I know is that I can choose one of them , using the next code for example : What Happens When a View is Added to a ViewGroup. Event the Logcat does not show any errors. If so, detach the fragment and reattach it // Reload current fragment Fragment frg = null; frg = getSupportFragmentManager(). So I think I might need to force my view to redraw? android; view; redraw; android-view-invalidate; titor. the panes these are in locations where they should not be or simply Wait for a View to redraw itself before the next line of code is executed. The former is used in the UI thread itself, while the latter is used in non-UI threads. Add a comment | How to redraw View in Android. I also tried to call init with context, but then the whole View disappeared and custom android view does not update when `invalidate` is called. is there any way to resolve this? So for refresh control you always have to have something in your list rendered to give the scroll view some height! NOTE: I use styled components and my MessageView has a large height so it takes up most of the I think you want to refresh the fragment contents upon db update. When it's necessary to execute invalidate() on a View? 1. In drawview try this . My app's main. Clicked += (sender, e) => Guy's answer works when the View has not yet been laid out in a parent view. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer. Hi @bill_froelich the issue we face that we have created rule on page onload it works is to take data from API and save it in ClientData. Android wait for UI thread to invalidate. @MusiGenesis: I ran a quick test and saw the same behaviour with Refresh vs. However when the phone orientation changes, it does not work. invalidate to continuously draw on canvas. Apparently, notifyDataSetChanged() is only to be used if you are adding / removing items. – 1. Improve this answer 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. The true cause of the problem appears to be that the changes made to testCanvass[0] within updateViews are not "sticking", i. From its documentation:. lockCanvas(). But i have a button and after clicking on it, I want to redraw that View with another parameters. If the whole view type changes then notifyItemChanged without payload will work but will re-render the view giving a flicker effect. I created control with GraphicsView chart that takes progress property. Collectives™ on Stack Overflow. app. For fragments that have been instanciated by the XML layout file of the activity only onActivityCreated is called Ask questions, find answers and collaborate at work with Stack Overflow for Teams. analytics. I have created custom view to draw a custom speech bubble inside and I want put some text on custom view. lockCanvas(); c. Sometimes, if those images modify the text position, the old text position is not cleared and both old text and new text+image is displayed. – Android :: Force A MapView To Redraw? Android :: SurfaceHolder. the place for the view is just empty, but taken. Am I missing something here? However when i remove contentContainerStyle={{flex: 1}} scroll start working but refresh control does not work then. The Today we will learn how to redraw View! The so-called redrawing is to redraw its appearance (style). e suppose you are having 3 text views in vertical direction and you make middle one invisible then there is a blank space between first and third and if the view for second one is gone then the third one Call canvas. requestLayout() and view. setAdapter(null) and then recyclerView. The Visibility is not working because the view is not rendered initially. Follow custom android view does not update when `invalidate` is called. I need the redraw to happen the moment the state of the flag changes. I have a visual element MyButton with a custom renderer implemented for iOS. but then the whole View disappeared and did not redraw. android custom view redraw. I use drawTextOnPath but it doesn't work right, I want the text to appear line by line. getPageProxy(). Am I missing something here? If only the content inside the view needs changes then would suggest using notifyItemChanged with payload. Also I have simple button. postInvalidate(); Also note that redrawing a container might not redraw all of its views. Every time Action_UP gets called, you add the path to the ArrayList, use view. After that I call setContentView(CustomView view). On the View tab, click . So if you add a child view, or modify the content dynamically, you're screwed. When you call notifyDataChanged, it will update this view. I am drawing my playermodel with a bitmap and I want to change the model with an ontouch event, but it is not working and I don't know, what I'm doing wrong: ( First of all android; android-canvas; android-bitmap; android-view-invalidate; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In my case, even running the adb shell setprop debug. All container I'm trying to figure out the optimization for my custom view. getLayoutManager(); int firstItem = manager. Windows. GONE makes the view invisible without the view taking up space in the layout. findFirstVisibleItemPosition(); View This is working fine, the View is shown. Ask Question Asked 9 years, The reason this will work is that posting to the main handler will add it to the message queue which has already the call to Invalidate in it which will be executed before the call to Android View: force onDraw() and wait till its done. If any row item of list contains focusable or clickable view then OnItemClickListener won't work. extends View. E. Although my problem was not actually solved, I gave the reward to Alex View view = new MyView(); setContentView(view); Inside of your MyView class you would have an ArrayList of Path objects. Trying to re-use layouts with minor differences programmatically. One is invalidate and the other is postInvalidate. So, if you are working only with Android you may remove behavior prop and it should work straight away. But why does (1) happen at all? Is that the normal behaviour for the paint cycle of a view hierarchy? Problem. drawText("Text", x, y, paint); getHolder(). But id doesn't update! I tried using "invalidate()" and "postInvalidate()" but they doesn't work! Here is the code of RadarView: `public class RadarView extends View EDIT: To restore the exact same apparent position, as in, make it look exactly like it did, we need to do something a bit different (See below how to restore the exact scrollY value): Save the position and offset like this: LinearLayoutManager manager = (LinearLayoutManager) mRecycler. You are first using GONE and then INVISIBLE on the same view. On Windows, this calls ViewHandlerExtensions. My control: Yes, you can add attribute android:configChanges="orientation" to the activity declaration in the AndroidManifest. setAdapter(adapter). Is there a way to change the view bindings and update the view. To refresh the screen: Click Redraw View on the View toolbar, or click View > Redraw , or press Ctrl+R . detach(frg); Today we will learn how to redraw View! The so-called redrawing is to redraw its appearance (style). From what I can see, it is not redrawn as 0, but rather on every click it adds 100 without ever going to 0. Hot Network Questions The problem about relativity in You can use this code: // Create an array that matches any country to its id (as String): String[][] countriesId = new String[NUMBER_OF_COUNTRIES_SUPPORTED][]; // Initialize the array, where the first column will be the country's name (in uppercase) and the second column will be its id (as String): countriesId[0] = new String[] {"US", String. I tried: View in Android ListView not redrawing. Here is a basic example of this. * Triggers redraw. 2/ Custom View: draw it yourself using the canvas and math. However, when I actually type something in the search box, the whole listview redrwas including the header because I call notifyDataSetChanged. getWidth(); iconHeight = iconImage. Anyway, that's what I needed to do, and seems to work. Invalidate/Update. 6,170 8 8 gold Redraw View Android. notifyDataSetChanged but onCreateViewHolder is not called; call recyclerView. refreshDrawableState() without any visible difference. Modified 6 Everything works ok (activity / current fragment communication) except the fact that I cannot refresh the fragment's view. display empty data. The only methods that seem to be relevant are Here's using the android-x solution, which should even work in case you have a floating UI using SAW permission (System Alert Window) : @SuppressLint("InflateParams Invalidate, invalidateviews, notifyDatasetChanged, nothin worked for me! To just update the listview (with cursoradapter) I just do: cur = db. ScrollView doesn't work. Commented Apr 14, 2020 at 12:59. Ask Question Asked 13 years, 7 months ago. invalidate() not working to redraw imageview. observe should not be there if viewmodel. save() then do drawing then call canvas. RecyclerView does not have special provisions for attaching click handlers to items unlike ListView which has the method setOnItemClickListener(). 2 sometimes the webView will not draw its contents after the data has loaded. I had this working with the onResume(), but the problem with that was that the layout went back to the default state and did not save any input or button changes that had been made, this happened when I switched from one tab to the next. As pointed out above and elsewhere - overriding View. xaml is the element to display it not working. If the child is a ViewGroup, it will recurse and search the child. White); //Or whichever bg color before drawing the bitmap. What can I do? I tried view. I recreated (new CustomView) the view every time the database has been updated. I've a problem with getting a redraw of a View in my application. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company so there are two different ways to do this: 1/Combine different Views: such as TextView, ImageView, and Drawable resources. Now, in regular intervals, this View object (which is a subcomponent in an Activity using Relative Layout) has to be refreshed. When I drag click on first button it should show the This is the correct answer if one only needs to REDRAW the view. The parent will divide the horizontal space remaining This is a known issue with KeyboardAvoidingView and Android. getControl('SectionedTable0'); container2. Thank you! I solved the problem but putting the code to save/share the image inside of a runnable and running it after removing the cursor character. Measure framerate for video playback. Search 'Redraw View' in the SOLIDWORKS Knowledge Base. Programmatically Thanks for response, but this will not work when parent intercepts touch events (for example when this view is placed inside ScrollView or ViewPager). Meaning all the rows are hidden, until I scroll or click I am trying to figure out what is the issue with updating RecyclerView's Adapter. And my workaround is use both methods at sequence, i. Redraw the current view . invalidate(); with no luck. When the screen is rotated, its fine as onCreateView() is ran again, but I need it to refresh onResume. I did a CellPainting because iterating back over the rows in the Datagridview and painting them took WAY too long, so this is more efficient. invalidate() which didn't work, I've concluded that setting the uri to null before setting it again is the best if not the only way to use setImageUri for a single changing image file. . Android custom view, onDraw not called after calling invalidate() 0. changeCursor(cur); // or swapCursor(), cur is the initial and the only cursor Background. android. llHint. scrollview does not work in my layout. Here a screenshot of what it looks like when the problem occurs: It's like the webview do not redraw correctly it's content. Follow edited Jan 27, 2014 at 7:13. aging i'm trying to add new list in that linearlLayout not added. Ask Question This works well in onCreate(). – Arbaz. Android : How to force a view to redraw immediately before the next line of code is executedTo Access My Live Chat Page, On Google, Search for "hows tech dev View. Here is parts of my code: public class SkillPath extends View { Paint paint; Path path; constructors @Override If you set a background drawable for a View, then the View will draw it before calling back to its onDraw() method. Try Teams for free Explore Teams. View Addition: The view is inserted into the ViewGroup's list of children. : myRecyclerView. requestLayout() This is working fine, the View is shown. dispatchTouchEvent() View. Following is my import statement: I just found a solution from here, but by deep clicking. To avoid a UI that feels sluggish or stutters during playback, ensure that animations consistently run at 60 frames per second How do I add and remove views such as TextViews from Android app like on the original stock Android contacts screen where you press a small icon on the right side of a field and it adds or deletes a find answers and collaborate at work with Stack Overflow for Teams. That's why he compresses the last view and makes it zero width. ; Parent Reference Invisible Views are not shown on UI but they are taking the space on screen whereas gone view are not taking the space on screen as well i. xml file. I wanted to force Drawable to update when progress changes, but it doesn't work properly. So sometimes it doesn't work Android : Force a View to redraw itself [ Beautify Your Computer : https://www. The child drawing order can be overridden with custom child drawing order in a ViewGroup, and with setZ(float) custom Z values} set on Views. Whereas if you I am working on MultiDirectionSlidingDrawer motion events. GONE will remove the View from the screen, and the space occupied by the View is released to other Views on screen. What I observed is that after onCreate(), onMeasure() is called twice. It looks more like a hack, but it works and nothing else that I tried does. Here is a picture: I want to connect 2nd & 3rd ImageViews with new Path line and change the first line color (for example to Green) when i clicking my button. ScrollView in Android does not work. Adapter as well, of course) From what I gather, since you have the parsing procedures and the call to notifyDataSetChanged() in the same block, either you're In android studio design view not working. GONE means only, that the view is not taking any space in the layout, INVISBLE means, the view takes space eg. Android ListView with Fragment. While I was hopelessly trying to find something, I decided to check the firebase plugin for Android Studio for something related and found out under the section for analytics that the following commands are needed for verbose logging: This is the ViewModel's problem. Of course, the ListView (or other class), to which the adapter is connected will redraw the elements, becuase the Adapter is forced to tell him, its The other FragmentActivity's action is performing a task which requires the Fragment to save its state via a call to onSaveInstanceState in preparation for a new instance being reconstructed. Learn more Explore Teams. beginTransaction(); ft. Improve this question. Admittedly, if response (1) happens then (2) should indeed follow, as all child views would then need complete repainting. I have created a class RoundIcon which extends View and the class contains setIconImage() method: public void setIconImage(int imageFromResources) { iconImage = BitmapFactory. On the View tab, click Redraw > Erase temporary graphics. Just like a superhero, the CustomView constructors play a key role. I have looked over this site loads and found nothing but "use notifyDataSetChanged()" which doesn't work. dispatchTouchEvent() ViewGroup. Force redraw of custom view (android) 2. React Native documentation says: Android may behave better when given no behavior prop at all, whereas iOS is the opposite. But I had a mistake in my above remarks: For this view, I do not have separate XAML files for Android and iOS, its in the edit view, where an additional Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I just found out View. In the above image, I can view the design When the application opens in portrait mode, the views transition works correctly. onTouchEvent() I have 3 ImageViews. setting up drawable. Thank you. When a view is initially set as gone in the xml file, Android will not render the layout until the visibility is changed to visible or invisible. Android - redraw canvas. And I wish to set the second word to be both RelativeSizeSpan (to set a relative font size) and TextAppearanceSpan (to set the color of the text) , how do I merge them both ?. So you override it like so: 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. in. In my case, I had not, and the definition of areContentsTheSame only checked one of Ask questions, find answers and collaborate at work with Stack Overflow for Teams. A null bitmap = unusable image. name" didn't help. invalidate method only working when put in 'onDraw' Hot Network Questions runOnUiThread(() -> view. onDraw() 61. Scroll view not working Android. I want that when the user clicks a button, the alpha would change to 100 and redraw. Run the application in the public repo. To force a view to draw, call invalidate(). After I get a new List of products, I tried to: Update the ArrayList from the fragment where recyclerView is created, set new data to 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. The problem I am having is that the ArrayAdapter does not refresh on resume. postDelayed(new Runnable() { @Override public void run() { Classic problem here: I'm fetching some data from a database into a recyclerView using an ArrayList of custom objects (and this happens in a Fragment, not in the Main Activity). I have handle with two buttons. Refreshes the screen, but does not rebuild the part. INVISIBLE makes the view just invisible still taking up space. android; android-custom-view; Share. Invalidate(); and then the class will call the onDraw Method in your view class. Calling invalidate() is done when you want to schedule a redraw of the view. notifyDataSetChanged(); that also not working. I tried also to call gardenCalendar. I am unable to set Visible or Gone layouts on Action_Move. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have a list view working properly using a custom CursorAdapter. EDIT. invalidate() and view. There are two methods for implementing view update in android. OK, I've established that the calls to invalidate() are causing all of the views to be redrawn, including view 0. Thanks! <android. I have created custom tab control using ScrollView control and Bindable StackLayout control. Force redraw of For certain user inputs (touch events), it happens that one element in the ListView calls invalidate() on itself. Parent topicManipulating Views. Since, the code is executed sequentially, first the view becomes GONE then it is overridden by the INVISIBLE type still taking up space. #dbz #dbs #dragonballz #dragonballsuper #android18 #android17 #clipstudiopaint". You should not push a new list, if the requirements aren't met. My issue is that data is stored in ClientData but when use let container2 = context. xml looks like this: <?xml version="1. The only result is that it takes a long time to eventually see the letter "D" show up. It works correctly (aka the fixed background remains fixed) on browsers other than Microsoft Edge. If the list you supply in setupViewModel via viewmodel. v4. Also note: Bitmaps are quite heavy on the memory usage of your app. It will result in onDraw being called eventually (soon, but not immediately). If the view hasn't yet been measured and laid out, Guy's answer works fine. onDraw() and calling View. The bitmaps should have a transparent background. TextView set visibility gone if its empty. Shared: namespace RendererTest { public class MyButton: Button { public Color BoundaryColor { get; set; } } public static class App { public static Page GetMainPage() { var button = new MyButton { Text = "Click me!", BoundaryColor = Color. There are multiple ways to address this issue. Everything works li Ofcourse, you need to store the info about what to redraw yourself and preferably not use a new Paint everytime, but that are details. Solves the problem of views not being updated, but probably not the best solution for complex layouts. view_pager); cleanBackStack(viewPager. I even threw in a delay loop between those assignments. View Visibility not working. dd619. If you are going to create a custom view, make sure it is extending SurfaceView then, you can redraw it with method getHolder(). I have searched but cant find a solution to my problem. I have written a custom Android View based on a LinearLayout which I have called ReflectingLayout. valueOf(R. The recommended way to create such a layout is to add Modifier. From android 3. firebase. I had crashes when I cached a View that was used with a scroller and that was like 5 times the height of the device, since it used > 10MB memory! I have created a custom view com. Here is the code. GONE) and then recyclerView. Here is an example: Canvas c = getHolder(). fillMaxWidth does. 0" encoding="utf-8"?> <LinearLayout The Skia view is not supported anymore unfortunately. id. Depending on Now that you have a well-designed view that responds to gestures and transitions between states, ensure that the view runs fast. The list does just not get updated: I'll post the working code. but nothing happens, the View has the old values and did not redraw. I've seen this for example when I was firing off an activity from a fragment which filled the entire screen as this resulted in the view being detached from the fragment, I have a class that extends View and have the onDraw method implemented in my xml file I have a FrameLayout with my view and a RelativeLayout with a button The problem is the order of operations for how Android handles touch events. I have a problem on Action_Move. As you can see from the above sentence, the invalidate method We have class which extends View. calling Invalidate will not go and call Draw(). ComputeDesiredSize() returns a size of { 0, 0 } + margin width & margin height for Paths which means that the effective size of the Path stroke is 0x0px, hence why nothing is drawn. Otherwise, it will call invalidate() on the child (this is the termination case). note: if i'm without remove view added previousList + currentList added. abc is null, then you should not push the livedata yet or should push a different state. That's what I needed to do, so gave an up-vote. redraw(); it not updating the How to force a redraw of the views in Activity. package. I'm trying to create a gridview that gives the possibility to the user to create a new child clicking on the last item on the gridview. Share. 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 Thank you! I spent too many hours trying to figure this out. I used the method addHeaderView to have a search box on the first row of the list because it needs to go away as you scroll. findViewById(R. 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. 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. This is the different from non-hardware acceleration mode when all the views onDraw been called. Ask Question Asked 9 years, 5 months ago. I am using ViewPager to allow user to swipe between its views. notifyItemChanged(position, "CHANGE_TEXT_VIEW_ITEM"); Suppose I have the next text : Hello stackOverflow. Redraw all of the views . The idea is fairly simple, to render a reflection effect below any child Views declared within the ReflectingLayout. android: Creating Image and filling colors in Canvas. Steps to Reproduce. decodeResource(getResources(), imageFromResources); iconWidth = iconImage. I do agree that this is a nightmare and a real flaw in Android UI! TESTED ON ANDROID JELLY BEAN IN 2014. EDIT: The purpose of the android:configChanges attribute is to prevent an activity from being recreated when it's really necessary. In this case the view recieves DOWN but not UP when scrolling started Force redraw of custom view (android) 1. When the mouse button is depressed, alpha should reset to 0. If you have a chance to look at getView method you will see that convertView is created just once. invalidate() but it's not working i mean no clear whole layout which contain textview, edittext etc. invalidate() call recyclerView. Can I redraw a View without forcing a redraw of the underlying View? 2. I'm wondering if the calling to View. call adapter. Why not let LinearLayout do the layouting with the help of the android:layout_weight You could try refreshing the listview by calling listView1. onDraw will not be called because it's already recorded!. What I need to do is set a random theme and then have all other views adopt this theme. Viewed 9k times Part of Mobile Development Collective 1 . MAY NOT WORK ON NEWER ANDROID VERSIONS. GONE)? 0. Red }; button. 3 The view to give focus to on the last line of run() might be some other view, not necessarily the same ListView you selected, I think. Net MAUI (VS for Mac 2022 Prev) it's not working properly in Android. Accessing the current view by getView() does not work as this function returns null; it seems that after the fragment is created (on ViewCreated is called) getView gets destroyed. 🌸🌸🌸 . First, create a new android project, we define a class, and inherit View, the class name is: DrawView: Cannot redraw a graphics view when the view is inside either a grid or stacklayout. requestLayout() Is there a way to force an android view to redraw it's background? I have set a drawable shape with a gradient as background which works fine but after changing the view's height you can see those ugly gradient steps. I ran into this same issue with invalidate(), and since there isn't a good answer elsewhere on SO, I figured I'd post my solution. onDraw will be called and record to the GPU, but A. Find centralized, trusted content and collaborate around the technologies you use most. After looking at the source myself and trying view. You can still use it to use and animated using the imperative API (see this In my project,this is a stackbar, there is a Dynamic categories,so the series data will changed usually, first,i setOptions with a changed options after i want to call redraw,but redraw is not The example Demos/Tests/RedrawTest: void setup() { size(400, 400, P2D); noLoop(); } void draw() { background(255, 0, 0); ellipse(mouseX, mouseY, 100, 50); View. I never see "A", "B" or "C". 1. 0 votes. android; android-layout; android-intent; android-widget; android-fragments; This seems to work only for fragments that are attached to the activity programatically. I am achieving this by overriding dispatchDraw() in ReflectingLayout as follows: @Override protected void Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have a RecyclerView with a bunch of custom views which may change height after a while, because they contain ImageViews which load their image asynchronously. This is the basis for how an image is actually used. invalidate will make for an unhappy battery / app performance will drop. tags: Android game UI thread UP. But when I click on the image, nothing happens. 2. findFragmentByTag("Your_Fragment_TAG"); final FragmentTransaction ft = getSupportFragmentManager(). The view will be redrawn but the size will not change. The problem is that sometimes, the element then redraws itself and sometimes not. Here is the class that extends from ViewPager returning POSITION_NONE apparently adds a lot of inefficiency to the overall application as this causes Android to delete the view associated with the queried position. 2. invalidate()); or. This puts the runnable code at the end of the message stack and allows the UI to update its view before trying to save an image of the view. notifyDataSetChanged(); it did not work. Update all of the views . Here is the code summary: public void shareToOtherApps(View v) { // Remove This is working fine, the View is shown. Here you can see an example of how your list item should look like. This is a recursive function that will loop through all of the children views of a ViewGroup. html ] Android : Force a View to redraw itself Note: . Simple Click Handler within ViewHolder. please suggest correct way Today we will learn how to redraw View! The so-called redrawing is to redraw its appearance (style). Everything works ok (activity / current fragment communication) except the fact that I cannot refresh the fragment's view. Of course a simple invalidate() does not work To make it working in android with expo I had to add a few more things, hope this will help <KeyboardAwareScrollView extraScrollHeight={100} enableOnAndroid={true} keyboardShouldPersistTaps='handled'> <ScrollView> </ScrollView> </KeyboardAwareScrollView> Not sure why the react-native-keyboard-aware-scroll-view Sometimes, if those images modify the text position, the old text position is not cleared and both old text and new text+image is displayed. I think it is somehow related to the fact that it is loaded in a Fragment. I tried getting the frameLayout and invalidating the view, but it does not seem to work. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. I am trying to figure out what is the issue with updating RecyclerView's Adapter. widget. The same happens when the application is opened in landscape mode. But it just jumps right to the final value ("D"). Right-click the view and select Update window. For example, after a user login occurs that needs to expose more info or options within each view of the listView. Custom View redraws only once, then You should not call invalidateViews and setAdapter to refresh your grid view. Is it possible in Android to refresh the view of a fragment. So when you got two views: A above B, and you call B. If scrolling on listview makes the views visible, you could also try scrolling the listview to the bottom and then scroll back to the original position programmatically. You could also try adapter. drawColor(Color. First, create a new android project, we define a class, and inherit View, the class name is: DrawView: I create my own View (RadarView), extending View. Of course a simple invalidate() does not work To make it working in android with expo I had to add a few more things, hope this will help <KeyboardAwareScrollView extraScrollHeight={100} enableOnAndroid={true} keyboardShouldPersistTaps='handled'> When I click on the button I want to hide a view (another button) that is loaded in the FrameLayout. Call canvas. Custom View - Speech Bubble Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company This works great in all browsers except Microsoft Edge, where the position of the element doesn't remain fixed. weight(1f) to the flexible view, Slider in you case. Create a new adapter, as others did, and it worked for them, but there wasn't Click Redraw View on the View toolbar, or click View > Redraw, or press Ctrl+R. Also depends on the bitmaps you are drawing. g. view. So I opened it up in Reflector and saw that Control. followed by: (2) every child view undergoes a complete redraw. Explore Teams. TextView. The view then needs to be re-created again before displaying. scrollview not working at all on Android. I have first created this solution in Xamarin. Redraw In this Gallery every item i'm called updateDetails() method remove working fine. If you attempt to animate on a view that has not been rendered yet, the animation will occur on the view without a Works on Android as shown above. The row item must have a param like android:descendantFocusability = "blocksDescendants". 7. If you are updating information about items that are already displayed, you might end up with visible items not updating their visual appearance (getView() not being called on your adapter). unlockCanvasAndPost() Does Not Cause Redraw; Android :: Getting View To Redraw When Parameters Change; Android :: Redraw Linearlayout After Clicking On Button? Android :: How To Redraw Only A Part Of My Custom View; Android : Get A Custom View To I have an ImageView for which I wanted to implement the onClickListener. I created a CellPainting event to color the rows based on cell values. (1) the entire parent view undergoes a complete redraw. In the 'assess_list_layout' linerlayout height can be hardcode because inside this layout the listview height is already hardcoded. Improve this answer. hnzpc ejwdm vpoukeax jrun dlpq npsupnno vrisuxj gdnzd yljjaiyh yxbvx gkjsfxg eessotz hmpx caqrw lhutjh