Android redraw view not working. beginTransaction(); ft.

Android redraw view not working findViewById(R. On Windows, this calls ViewHandlerExtensions. You should not push a new list, if the requirements aren't met. Each touch event follows the pattern of (simplified example): Activity. 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. I created a CellPainting event to color the rows based on cell values. I have created custom tab control using ScrollView control and Bindable StackLayout control. 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. 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. If the view already has been measured and laid out in a parent-view, Guy's answer may screw up your Activity's layout. setting up drawable. android custom view redraw. It will result in onDraw being called eventually (soon, but not immediately). app. React Native documentation says: Android may behave better when given no behavior prop at all, whereas iOS is the opposite. Thank you. (Android) Layout won't redraw after setVisibility(view. setVisibility(View. 35; asked Oct 4, 2018 at 12:49. I tried also to call gardenCalendar. Depending on Now that you have a well-designed view that responds to gestures and transitions between states, ensure that the view runs fast. So I opened it up in Reflector and saw that Control. But when I click on the image, nothing happens. 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. xml file. 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. MAY NOT WORK ON NEWER ANDROID VERSIONS. View Addition: The view is inserted into the ViewGroup's list of children. Call canvas. Teams. 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. To refresh the screen: Click Redraw View on the View toolbar, or click View > Redraw , or press Ctrl+R . . e. support. drawable. Apparently, notifyDataSetChanged() is only to be used if you are adding / removing items. Remove the visibility gone in the xml and handle the visibility fully in the adapter class. From its documentation:. beginTransaction(); ft. To force a view to draw, call invalidate(). Scroll view not working Android. That's why he compresses the last view and makes it zero width. 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. requestLayout() This is working fine, the View is shown. ScrollView in Android does not work. restore(). 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. RecyclerView does not have special provisions for attaching click handlers to items unlike ListView which has the method setOnItemClickListener(). Ask Question Asked 9 years, 5 months ago. 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. Android wait for UI thread to invalidate. Also depends on the bitmaps you are drawing. 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. 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). A null bitmap = unusable image. 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. The problem I am having is that the ArrayAdapter does not refresh on resume. Admittedly, if response (1) happens then (2) should indeed follow, as all child views would then need complete repainting. requestLayout() or listView1. in. You could also try adapter. 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. tech/p/recommended. This issue is directly related to CSS3 Filters as removing them makes the position fixed work correctly. 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. 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. 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. ; 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. 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. 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. We have detected you are using a browser version older than Internet Explorer 7. Android custom view, onDraw not called after calling invalidate() 0. I have a problem on Action_Move. 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. Now, in regular intervals, this View object (which is a subcomponent in an Activity using Relative Layout) has to be refreshed. tried invalidate(); and this. The view then needs to be re-created again before displaying. When you call notifyDataChanged, it will update this view. Explore Teams. I have searched but cant find a solution to my problem. Edit. @MusiGenesis: I ran a quick test and saw the same behaviour with Refresh vs. notifyDataSetChanged(). So I think I might need to force my view to redraw? android; view; redraw; android-view-invalidate; titor. From what I can see, it is not redrawn as 0, but rather on every click it adds 100 without ever going to 0. Please consider using Canvas instead. The problem(s) The CellPainting event does not for form load. 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. 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. Measure framerate for video playback. INVISIBLE makes the view just invisible still taking up space. 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. The idea is fairly simple, to render a reflection effect below any child Views declared within the ReflectingLayout. Since, the code is executed sequentially, first the view becomes GONE then it is overridden by the INVISIBLE type still taking up space. One is invalidate and the other is postInvalidate. Steps to Reproduce. I think it is somehow related to the fact that it is loaded in a Fragment. the place for the view is just empty, but taken. 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. Android ListView with Fragment. 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. Also note: Bitmaps are quite heavy on the memory usage of your app. 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. E. I am using ViewPager to allow user to swipe between its views. Ask Question This works well in onCreate(). This is the different from non-hardware acceleration mode when all the views onDraw been called. llHint. 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. Learn more Explore Teams. Update all of the views . 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. fillMaxWidth does. scrollview does not work in my layout. White); //Or whichever bg color before drawing the bitmap. After that I call setContentView(CustomView view). #dbz #dbs #dragonballz #dragonballsuper #android18 #android17 #clipstudiopaint". So if you add a child view, or modify the content dynamically, you're screwed. When it does not redraw itself after invalidate() has been called, I need to scroll the ListView in order to get the desired redraw. html ] Android : Force a View to redraw itself Note: . aging i'm trying to add new list in that linearlLayout not added. 7. When I drag click on first button it should show the This is the correct answer if one only needs to REDRAW the view. To achieve a similar effect, we can attach click events within the ViewHolder within our adapter:. Then it dawned on me: The Refresh method is virtual. drawText("Text", x, y, paint); getHolder(). 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. Force redraw of For certain user inputs (touch events), it happens that one element in the ListView calls invalidate() on itself. TextView set visibility gone if its empty. Android - redraw canvas. Here is the code. tags: Android game UI thread UP. rawQuery( "SELECT * FROM ssnt WHERE mid = 1000" ); //optional, initial query adapter. 0, when using Hardware acceleration, the drawing of views is recorded and stored at the GPU. What I need to do is set a random theme and then have all other views adopt this theme. Here is an example: Canvas c = getHolder(). view_pager); cleanBackStack(viewPager. But i have a button and after clicking on it, I want to redraw that View with another parameters. followed by: (2) every child view undergoes a complete redraw. xml looks like this: <?xml version="1. onDraw will not be called because it's already recorded!. 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. 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. I even threw in a delay loop between those assignments. Redraw In this Gallery every item i'm called updateDetails() method remove working fine. onConfigurationChanged. – Arbaz. getControl('SectionedTable0'); container2. I'm wondering if the calling to View. 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. * Triggers redraw. Run the application in the public repo. Redraw the current view . setVisibility not working before Activity change. 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. Force redraw of AI features where you work: search, IDE, and chat. Am I missing something here? If only the content inside the view needs changes then would suggest using notifyItemChanged with payload. Follow custom android view does not update when `invalidate` is called. I have created a class RoundIcon which extends View and the class contains setIconImage() method: public void setIconImage(int imageFromResources) { iconImage = BitmapFactory. 6,170 8 8 gold Redraw View Android. invalidate() but it's not working i mean no clear whole layout which contain textview, edittext etc. lockCanvas(); c. The true cause of the problem appears to be that the changes made to testCanvass[0] within updateViews are not "sticking", i. All container I'm trying to figure out the optimization for my custom view. id. requestLayout() and view. 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. : myRecyclerView. I do agree that this is a nightmare and a real flaw in Android UI! TESTED ON ANDROID JELLY BEAN IN 2014. dispatchTouchEvent() View. onDraw will be called and record to the GPU, but A. 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). When the mouse button is depressed, alpha should reset to 0. 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. I've a problem with getting a redraw of a View in my application. android; android-layout; android-intent; android-widget; android-fragments; This seems to work only for fragments that are attached to the activity programatically. drawRect(getLeft(), getTop(), getright() , getBottom() ,paint); I tested this on android only. The row item must have a param like android:descendantFocusability = "blocksDescendants". Forms (VS for Mac 2019) and it works fine in both platforms, but the same solution when developed in . But why does (1) happen at all? Is that the normal behaviour for the paint cycle of a view hierarchy? Problem. findFirstVisibleItemPosition(); View This is working fine, the View is shown. If the child is a ViewGroup, it will recurse and search the child. OK, I've established that the calls to invalidate() are causing all of the views to be redrawn, including view 0. 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. Ask Question Asked 13 years, 7 months ago. Windows. I wanted to force Drawable to update when progress changes, but it doesn't work properly. notifyDataSetChanged but onCreateViewHolder is not called; call recyclerView. decodeResource(getResources(), imageFromResources); iconWidth = iconImage. From android 3. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer. 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). . Collectives™ on Stack Overflow Listview in android did not refresh the view until dragged. Commented Apr 14, 2020 at 12:59. invalidate method only working when put in 'onDraw' Hot Network Questions runOnUiThread(() -> view. Is it possible in Android to refresh the view of a fragment. Invalidate/Update. 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. On the View tab, click Redraw > Erase temporary graphics. ScrollView doesn't work. 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 😭💙 . Add a comment | How to redraw View in Android. 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. 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. 2. If you have a chance to look at getView method you will see that convertView is created just once. invalidate to continuously draw on canvas. save() then do drawing then call canvas. name" didn't help. firebase. Find centralized, trusted content and collaborate around the technologies you use most. getPageProxy(). 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. Modified 6 Everything works ok (activity / current fragment communication) except the fact that I cannot refresh the fragment's view. If the view hasn't yet been measured and laid out, Guy's answer works fine. observe should not be there if viewmodel. (currently "android:switcher:" + containerId + ":" + i) Then the way to use it is after getting the container: ViewPager viewPager = (ViewPager) view. setAdapter(adapter). Thanks! <android. cs's GetDesiredSizeFromHandler() which uses the widthConstraint & heightConstaint values (since I have a form that loads a DataGridView. dispatchTouchEvent() ViewGroup. I tried getting the frameLayout and invalidating the view, but it does not seem to work. widget. GONE means only, that the view is not taking any space in the layout, INVISBLE means, the view takes space eg. It looks more like a hack, but it works and nothing else that I tried does. After looking at the source myself and trying view. What I observed is that after onCreate(), onMeasure() is called twice. The only result is that it takes a long time to eventually see the letter "D" show up. notifyItemChanged(position, "CHANGE_TEXT_VIEW_ITEM"); Suppose I have the next text : Hello stackOverflow. Refreshes the screen, but does not rebuild the part. 1st and 2nd connected with red line. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Since it is necessary to redraw, you must first inherit the View class. I have first created this solution in Xamarin. e. abc is null, then you should not push the livedata yet or should push a different state. Modified 4 years, 9 months ago. postInvalidate(); Also note that redrawing a container might not redraw all of its views. Custom View redraws only once, then You should not call invalidateViews and setAdapter to refresh your grid view. KTab, as the XML shown below, I have a FrameLayout on top and my custom view at the bottom. dd619. Following is my import statement: I just found a solution from here, but by deep clicking. Red }; button. If the list you supply in setupViewModel via viewmodel. I've found a workaround to refresh the view inside my fragment. The Visibility is not working because the view is not rendered initially. Improve this answer. invalidate will make for an unhappy battery / app performance will drop. xaml is the element to display it not working. Calling invalidate() is done when you want to schedule a redraw of the view. Parent topicManipulating Views. When it's necessary to execute invalidate() on a View? 1. GONE)? 0. 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. For example, after a user login occurs that needs to expose more info or options within each view of the listView. 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. Just like a superhero, the CustomView constructors play a key role. android; android-custom-view; Share. call adapter. I have created custom view to draw a custom speech bubble inside and I want put some text on custom view. Refresh is, literally, an Invalidate followed by an Update. 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. I have written a custom Android View based on a LinearLayout which I have called ReflectingLayout. 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. The same happens when the application is opened in landscape mode. 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. There are multiple ways to address this issue. Why not let LinearLayout do the layouting with the help of the android:layout_weight You could try refreshing the listview by calling listView1. weight(1f) to the flexible view, Slider in you case. invalidate()); or. 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). Trying to re-use layouts with minor differences programmatically. g. invalidate() not working to redraw imageview. Can I redraw a View without forcing a redraw of the underlying View? 2. So sometimes it doesn't work Android : Force a View to redraw itself [ Beautify Your Computer : https://www. 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. Am I missing something here? However when i remove contentContainerStyle={{flex: 1}} scroll start working but refresh control does not work then. Otherwise, it will call invalidate() on the child (this is the termination case). android. 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. I have looked over this site loads and found nothing but "use notifyDataSetChanged()" which doesn't work. getHeight(); refreshDrawableState(); } I think this might be work with a view group , but not a view. Right-click the view and select Redraw view. onTouchEvent() ViewGroup. So when you got two views: A above B, and you call B. unlockCanvasAndPost(c); View has two very important methods: invalidate and requestLayout, which are often used for View redrawing and updating. liveData. Force redraw of custom view Update the current view . In the above image, I can view the design When the application opens in portrait mode, the views transition works correctly. Here you can see an example of how your list item should look like. 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. I never see "A", "B" or "C". detach(frg); Today we will learn how to redraw View! The so-called redrawing is to redraw its appearance (style). Try Teams for free Explore Teams. So, if you are working only with Android you may remove behavior prop and it should work straight away. Invalidate(); and then the class will call the onDraw Method in your view class. In this case the view recieves DOWN but not UP when scrolling started Force redraw of custom view (android) 1. 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. It works correctly (aka the fixed background remains fixed) on browsers other than Microsoft Edge. If the whole view type changes then notifyItemChanged without payload will work but will re-render the view giving a flicker effect. Clicked += (sender, e) => Guy's answer works when the View has not yet been laid out in a parent view. 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. 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. This is inconvenient. but nothing happens, the View has the old values and did not redraw. 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 use drawTextOnPath but it doesn't work right, I want the text to appear line by line. If so, detach the fragment and reattach it // Reload current fragment Fragment frg = null; frg = getSupportFragmentManager(). Force redraw of custom view (android) 2. please suggest correct way Today we will learn how to redraw View! The so-called redrawing is to redraw its appearance (style). 2/ Custom View: draw it yourself using the canvas and math. ScrollView doesn't scroll in layout? 0. Whereas if you I am working on MultiDirectionSlidingDrawer motion events. 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. 0 votes. note: if i'm without remove view added previousList + currentList added. 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 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. GONE will remove the View from the screen, and the space occupied by the View is released to other Views on screen. 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. My issue is that data is stored in ClientData but when use let container2 = context. 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. I have handle with two buttons. I expect to see the content of my view change from A to B to C to D. public class ContactsAdapter extends In my custom View, I'm drawing a rectangle with an alpha of 0. – 1. I am trying to figure out what is the issue with updating RecyclerView's Adapter. Also I have simple button. Everything works ok (activity / current fragment communication) except the fact that I cannot refresh the fragment's 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. onTouchEvent() Activity. 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. 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. Draw circle when touched and when touch is removed in a custom view. lockCanvas(). getLayoutManager(); int firstItem = manager. However, when I actually type something in the search box, the whole listview redrwas including the header because I call notifyDataSetChanged. That's what I needed to do, so gave an up-vote. Search 'Redraw View' in the SOLIDWORKS Knowledge Base. Viewed 9k times Part of Mobile Development Collective 1 . changeCursor(cur); // or swapCursor(), cur is the initial and the only cursor Background. My app's main. 2. The bitmaps should have a transparent background. onDraw() 61. 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. I know that can be done by setContentView but for a fragment this does not work as it needs to inflate the view. analytics. I created control with GraphicsView chart that takes progress property. 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. invalidate() call recyclerView. mydomain. I need the redraw to happen the moment the state of the flag changes. but then the whole View disappeared and did not redraw. EDIT: The purpose of the android:configChanges attribute is to prevent an activity from being recreated when it's really necessary. 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. And my workaround is use both methods at sequence, i. onDraw() and calling View. Event the Logcat does not show any errors. GONE) and then recyclerView. VISIBLE) forces the Android framework to update the view visibility (<- forcing the view to redraw) even if the view is already visible. 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. An example of when a custom view would call it is when a text or background color property has changed. package. Teams When I change this text parts from another fragent I want the first fragment to redraw it's views. 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. Here is a basic example of this. Every time Action_UP gets called, you add the path to the ArrayList, use view. View Visibility not working. View. EDIT. This works well for 90% items. In the 'assess_list_layout' linerlayout height can be hardcode because inside this layout the listview height is already hardcoded. setEnabled(false) does not work quite right in android, in the following ways: Disable parent view does not automatically disable child views. But it just jumps right to the final value ("D"). 2 sometimes the webView will not draw its contents after the data has loaded. adapter. When a new view is added to a ViewGroup at runtime:. Is there a way to change the view bindings and update the view. notifyDataSetChanged(); that also not working. findFragmentByTag("Your_Fragment_TAG"); final FragmentTransaction ft = getSupportFragmentManager(). Follow edited Jan 27, 2014 at 7:13. 🌸🌸🌸 . 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. invalidate() does not seem to call View. 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. If you are going to create a custom view, make sure it is extending SurfaceView then, you can redraw it with method getHolder(). Anyway, that's what I needed to do, and seems to work. redraw(); it not updating the How to force a redraw of the views in Activity. The Today we will learn how to redraw View! The so-called redrawing is to redraw its appearance (style). display empty data. 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. TextView. Solves the problem of views not being updated, but probably not the best solution for complex layouts. Here a screenshot of what it looks like when the problem occurs: It's like the webview do not redraw correctly it's content. The view will be redrawn but the size will not change. There are two methods for implementing view update in android. Removing the grid and the Graphics view will begin to update. The former is used in the UI thread itself, while the latter is used in non-UI threads. You are first using GONE and then INVISIBLE on the same view. I tried: View in Android ListView not redrawing. Right-click the view and select Update window. 0. Still, it sounds quite strange that to have a list scroll to a specific element one must directly fiddle with focus. extends View. invalidate(); with no luck. The list does just not get updated: I'll post the working code. calling Invalidate will not go and call Draw(). Collectives™ on Stack Overflow. valueOf(R. The recommended way to create such a layout is to add Modifier. scrollview not working at all on Android. This is the basis for how an image is actually used. I have a visual element MyButton with a custom renderer implemented for iOS. scrollToPosition(position); new Handler(). So, a "GONE" view cannot come back. (1) the entire parent view undergoes a complete redraw. GONE makes the view invisible without the view taking up space in the layout. drawColor(Color. For example the Camera application uses this attribute because it the camera preview screen mustn't be LayoutExtensions. I am unable to set Visible or Gone layouts on Action_Move. Android view redraw. Here is the code summary: public void shareToOtherApps(View v) { // Remove This is working fine, the View is shown. On the View tab, click . view. If any row item of list contains focusable or clickable view then OnItemClickListener won't work. invalidate, B. Net MAUI (VS for Mac 2022 Prev) it's not working properly in Android. 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. 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 ?. 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. My control: Yes, you can add attribute android:configChanges="orientation" to the activity declaration in the AndroidManifest. 0" encoding="utf-8"?> <LinearLayout The Skia view is not supported anymore unfortunately. refreshDrawableState() without any visible difference. 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. v4. The problem is that sometimes, the element then redraws itself and sometimes not. I want that when the user clicks a button, the alpha would change to 100 and redraw. The parent will divide the horizontal space remaining This is a known issue with KeyboardAvoidingView and Android. 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. – Android :: Force A MapView To Redraw? Android :: SurfaceHolder. As pointed out above and elsewhere - overriding View. However when the phone orientation changes, it does not work. notifyDataSetChanged(); it did not work. Does not work on iOS, although the added persons are in the collection as they should. Timer not working in Android when calling invalidate() 2. As you can see from the above sentence, the invalidate method We have class which extends View. On MainPage. setAdapter(null) and then recyclerView. This ClientData is used as target for data table to show data. Refreshing custom view every second after cclicking button in Kotlin. Improve this question. This is a recursive function that will loop through all of the children views of a ViewGroup. onTouchEvent() I have 3 ImageViews. When the screen is rotated, its fine as onCreateView() is ran again, but I need it to refresh onResume. I have a problem redrawing the view. 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. I recreated (new CustomView) the view every time the database has been updated. In drawview try this . hows. Redraw all of the views . android: Creating Image and filling colors in Canvas. in kotlin i called layout directly By Id i. You can also do a manual invalidate call ever x ms like so /** * Due to bug in 4. app "your. 1. getWidth(); iconHeight = iconImage. 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. Simple Click Handler within ViewHolder. VISIBLE) call recyclerView. 5. invalidate() and view. 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. canvas. Share. What can I do? I tried 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. 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. 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. This bothered me because I was positive that I'd observed a difference before. oxtf sdnjtdwg abbxk opmpz zrpt lwffr ubustil eesnls evmls clnmj xxto pemdho gvgl vjeu rhdlf