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Starting from 2.3.5.233-pre1 the whole effects system don't work for android although it's work well for in UWP, Don't test it on iOS.
Here what i did:
Created PCL Xamarin.Forms app and modified MainPage.xaml
<Label x:Name="label" Text="Welcome to Xamarin Forms!" VerticalOptions="Center" HorizontalOptions="Center" />And MainPage.xaml.cs
public MainPage() { InitializeComponent(); label.Effects.Add(Effect.Resolve("App1.MyEffect")); }Then created MyEffect.cs in Android project
using Xamarin.Forms; using Xamarin.Forms.Platform.Android; [assembly: ResolutionGroupName("App1")] [assembly: ExportEffect(typeof(App1.Droid.MyEffect), "MyEffect")] namespace App1.Droid { class MyEffect : PlatformEffect { protected override void OnAttached() { try { Control.SetBackgroundColor(Android.Graphics.Color.LightGreen); } catch (Exception ex) { Console.WriteLine("Cannot set property on attached control. Error: ", ex.Message); } } protected override void OnDetached() { } } }I tested 2.3.5.233-pre1, 2.3.5.235-pre2, 2.3.5.239-pre3, 2.3.5.255-pre5, 2.3.5.256-pre6 and last nightly build 2.3.6.122-nightly but still don't work, When I downgraded to 2.3.4.247 it's work well.
I noticed the app recognize the effect but can't make it attached so it didn't execute effect code at all, Thanks in advanced.
@Maamoun This is a known issue and has to do with the effects not being attached on the new FastRenderers. It will be fixed.
Hi Quick question. there is new Device.UWP -> is it for desktop UWP and Mobile UWP or only Desktop UWP and mobile UWP -> WinPhone?
ScrollView width is not working propperly
private void UpdateSelectedIndex() { var center = _scrollView.ScrollX + (_scrollView.Width / 2); var carouselLayout = (CarouselLayout)this.Element; carouselLayout.SelectedIndex = center / _scrollView.Width; }private void ScrollToIndex(int targetIndex)
{
var targetX = targetIndex * _scrollView.Width;
_scrollView.Post(new Runnable(() => { _scrollView.SmoothScrollTo(targetX, 0); }));
}
on 2.3.5 pre6 my carousel view item is half smaller worked fine on 2.3.4.247
I have a big problem using listview with internet images. I reported to ffImageLoading but I believe this has nothing to do with this library, even if I use xamarin forms Image, it will occur. Basically when listview appears, it will download images from url for list items on the screen, usually there 3-4 items. If I use pre6 version, list gets frozen and app shows ANR on Android. This problem exist in stable release only when I scroll fast on the listview but with pre6, it occurs instantly without even scrolling. It is probably fast renders related. Does anybody else have seen this?
I'm having this issue on some Android devices, I can't always reproduce.
This is the only stack trace that I found on Mobile center:
No view found for id 0xdd (unknown) for fragment FragmentContainer{ede9eea #1 id=0xdd} 1 android.support.v4.app.FragmentManagerImpl.moveToState FragmentManager.java:1293 2 android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState FragmentManager.java:1528 3 android.support.v4.app.FragmentManagerImpl.moveToState FragmentManager.java:1595 4 android.support.v4.app.BackStackRecord.executeOps BackStackRecord.java:757 5 android.support.v4.app.FragmentManagerImpl.executeOps FragmentManager.java:2355 6 android.support.v4.app.FragmentManagerImpl.executeOpsTogether FragmentManager.java:2146 7 android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps FragmentManager.java:2098 8 android.support.v4.app.FragmentManagerImpl.execPendingActions FragmentManager.java:2008 9 android.support.v4.app.FragmentManagerImpl$1.run FragmentManager.java:710 10 android.os.Handler.handleCallback Handler.java:746 11 android.os.Handler.dispatchMessage Handler.java:95 12 android.os.Looper.loop Looper.java:148 13 android.app.ActivityThread.main ActivityThread.java:5459 14 java.lang.reflect.Method.invoke Method.java 15 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run ZygoteInit.java:728 16 com.android.internal.os.ZygoteInit.main ZygoteInit.java:618This is crashing the App.
Any ideias on why?
This started on this version.
What's is the minimum netstandard version supported by the current pre-release version?
Hi @DavidOrtinau, I cannot reproduce the issue with 2.3.5.256-pre6. It seems like that issue is resolved . . .
@Nwik .NET Standard 1.0
@JoeManke thank you
In pre6, Xamarin.Forms.Platform.Android.FastRenderers.ImageRenderer is missing:
protected Image Element { get; set; }Other fast renderers still support Element to get the XF control. Is this intentionally removed from the ImageRenderer? If yes, is there a quick way to access to XF control when inheriting from fast ImageRenderer or do I need to store this vaulue when received in OnElementChanged()?
@PhilipGruebele Be careful inheriting from the fast renderers. They will make them internal in the next version.
I also already built a version for MR.Gestures which works with the fast renderers. I guess I'll have to throw away that code too.
@MichaelRumpler Where did you get this information? It makes absolutely no sense to make these internal...and it will break my app because it is now dependent on them.
Re-read his post - there is a link to where he got that information. No need to ask.
For the click-the-link-impared:
@DavidOrtinau Disabling fast renderers by default make sense. But making them internal will prevent proper testing before you re-enable them (in my case I derive from each fast renderers).
The testing and feedback we've received while having the fast renderers in the pre-releases has made it apparent that we need to re-architect them a bit. Those architecture changes are going to be breaking changes for any subclasses of the fast renderers.
Once we put them in a stable release, we can no longer make breaking changes to them. So our options are:
We've opted for 3.
The "internal/public" switch won't be flipped back out of nowhere; it'll happen in a pre-release for a subsequent version so that there will be time for testing.
We are very excited about Xamarin Forms for Mac. At the moment we are in the midst of a proof-of-concept and would like to interop to a 32-bit component. We followed the preview sample below and got it to work just fine (see link below).
https://blog.xamarin.com/preview-bringing-macos-to-xamarin-forms/
However, if we go into the Mac Build settings and change the architecture from x86_64 to i386 we get an application crash on startup. The error specifically says that Xamarin.Mac is 64-bit and the application is 32-bit.
Anyone know if 32-bit Mac applications using Xamarin Forms will be supported?
@HumbleArchitect it's being discussed right now, so I'll let you know what they determine. It sounds like there's no reason it shouldn't be able to work on 32-bit.
Hi @DavidOrtinau. Any luck working on this bug by chance https://bugzilla.xamarin.com/show_bug.cgi?id=43692
It doesn't sound like it's going into 2.4. I've looked at forum post https://forums.xamarin.com/discussion/81768/launching-a-modal-over-a-page-containing-a-map-maps-ad-m-cannot-be-cast-to-android-view-viewgroup; however, the crash still occurs every so often. Is there a stable workaround by chance?
Any one else is seeing this error on iOS?
It is happening a lot. After 2 or 3 deploys it stops and come back after a few seconds of use.
It occurs when I push a simple page with a ListView.
@DavidOrtinau
Hi, any update on 2.4? the label fast renderer is causing me issues in a tabbed page.
This little bit of code causes it, I'll try and refactor to get round the issue
<Grid Grid.Column="2" Grid.Row="0" Grid.RowSpan="5" RowSpacing="0" ColumnSpacing="0" BackgroundColor="{StaticResource SeperatorGrey}" > <ScrollView BackgroundColor="#ffffff" Margin="2,0,3,3"> <Label HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" Margin="2" Text="{Binding SelectedMemo.Message}" VerticalTextAlignment="Start" BackgroundColor="#ffffff" LineBreakMode="WordWrap" Style="{StaticResource DetailPageDataLabelStyle}" /> </ScrollView> </Grid>EDIT:
This fixes it
<ScrollView Grid.Column="2" Grid.Row="0" Grid.RowSpan="5" BackgroundColor="{StaticResource SeperatorGrey}"> <StackLayout VerticalOptions="FillAndExpand" Orientation="Vertical" BackgroundColor="{StaticResource SeperatorGrey}" Margin="0,0,2,2"> <Label Margin="2" Text="{Binding SelectedMemo.Message}" VerticalTextAlignment="Start" VerticalOptions="FillAndExpand" BackgroundColor="#ffffff" LineBreakMode="WordWrap" Style="{StaticResource DetailPageDataLabelStyle}" /> </StackLayout> </ScrollView>Is there an ETA on when 2.3.5 might be moved to stable? There has been no movement on pre6 for 6 weeks.
2.3.5 won't be released as far as I understand. They are aiming for 2.4 and 3.0
!?
So at least another 6 months before we see the next stable release?
From my understanding, 2.3.5 has just been renamed 2.4, much like 1.5.2 was instead released as 2.0.
Sent 2.4-pre1 (aka 2.3.5-pre7 plus) to QA this afternoon, we are validating the build now, and will push to NuGet tomorrow unless we find a blocker.
Was it? Good to know we have some precedent.
It's tricky b/c we want the version to reflect the content of the release adhering more or less to semantic versioning, but also don't want to introduce confusion by switching the name of the release at the last minute. We obviously are choosing the former.
@DavidOrtinau - 1.5.3 in pre-release suddenly went to 2.0 due to evolve. I like to call it conference driven development
It would be awesome if the stuff we saw at Evolve actually made it into release. Remote USB connection for your iDevice ... A previewer that worked... {...{
This would be the greatest. I hate the other devs coming to my desk to look at the Mac when we want to use a real device for something.
I had it going on a version shortly after Evolve 2017 and it worked great. Then it disappeared from later releases, supposedly due to poor performance.
Personally I think Xamarin should not have retracted for performance. If they pulled things for poor performance we wouldn't have Android capability in Xamarin.Forms {laugh}
If it serves the customer needs that's up to the customer. I'd love to see this put back in and then leave it up to the customer to decide if it works well enough on their machines and network. It already exists - I'VE USED IT - all they have to do is put it back.
@AdamP "conference driven development"
@AdamMeaney could you levy a tax on devs coming to your desk? Donuts? Coffee? Sounds like an opportunity.
Seriously tho, I'm not sure what happened with the USB thing or why it was so slow.
Anyone using the remote simulator with VS? I know it's enterprise only version.
@DavidOrtinau We use the remote simulator for most things, it is just the occasional things need testing on real devices to make sure they perform as expected, or we want to use location in the field, etc.
But remote simulator is for VS Enterprise users. So everyone below that is left in the cold.
Also, a simulator is single-instance versus every developer having a tablet.
The simulator is of limited use. For daily development in HTTPS it's pretty useless, developing against devices means at least you know how the app will work and behave.
Install failed. Rolling back... Package 'Xamarin.Forms.2.4.0.266-pre1 : Xamarin.Android.Support.Design [23.3.0, ), Xamarin.Android.Support.v4 [23.3.0, ), Xamarin.Android.Support.v7.AppCompat [23.3.0, ), Xamarin.Android.Support.v7.CardView [23.3.0, ), Xamarin.Android.Support.v7.MediaRouter [23.3.0, )' does not exist in project 'some.nameAnyone else getting this when updating? i have higher version numbers on all of the "does not exist" packages..
Yeah, trying to update Xamarin.Android.* packages is usually a bad idea, as far as I know.
Well, this is lovely.
Today I was hit by two exceptions. The first one is a TypeLoadException with message: > "Could not resolve type with token 010000f3 (from typeref, class/assembly SQLite.CreateTableResult, SQLite-net, Version=1.5.166.0, Culture=neutral, PublicKeyToken=null)"
The second one is:
The first one appeared immediately after updating to 2.4. It was solved by clearing the solution, the app built and ran fine.
Then I changed something unrelated in the code, rebuilt (simply, without clearing) and the second exception appeared. That, again, went away by clearing the solution. A minor annoyance, but I'm not sure what can cause it and if it will return or not.
@DnielBuga im only updating XF
Then no, I haven't seen it. You can try removing those packages and reinstalling XF, but I guess you know this already.