Can any one plz tell me that we can apply mvvm pattern in xamarin.android the same way like we apply in xamarin.forms if yes then plz give me a reference about that or any example will be helpful
↧
MVVM pattern in xamarin.android
↧
Error updating Xamarin.Andoird nuget packages
When trying to update the Android Support libraries to 28.0.0.1, I get the following error...
Severity Code Description Project File Line Suppression State
Error NU1107 Version conflict detected for Xamarin.Android.Support.Compat. Install/reference Xamarin.Android.Support.Compat 28.0.0.1 directly to project XXXX.Android to resolve this issue.
XXXX.Android -> Xamarin.Android.Support.v7.MediaRouter 28.0.0.1 -> Xamarin.Android.Support.v7.Palette 28.0.0.1 -> Xamarin.Android.Support.Compat (= 28.0.0.1)
XXXX.Android -> Xamarin.Essentials 1.0.1 -> Xamarin.Android.Support.CustomTabs 27.0.2.1 -> Xamarin.Android.Support.Compat (= 27.0.2.1). XXXX.Android C:\SourceCode\XXXX\Android\XXXX.Android.csproj 1
I get similar messages for all of the Android Support libraries.
↧
↧
How to change the background color of the text/ sub string on swiping the text/sub string?
I need implementation similar to highlighting the text inside the paragraph on selecting the particular text.
↧
Failed to access Bluetooth functionality from IOS app
I have added Bluetooth access permission setting, into info.plist file. but when I check App privacy in IOS devices, my app is not listed in Privacy-> Bluetooth sharing.
NSBluetoothPeripheralUsageDescription
Tracker TSL To connect
↧
How check two different entries in Stacklayout.Children?
Hi everyone, good work 
I want only one Entrq.Text changed. My problem is that they all change at the same time
I check entries in my Stacklayout.Children. Try more way(ClassId,Id,tabındex) couldn't solve the problem.
My problem Video =
https://drive.google.com/file/d/1T6fts0gPxusFTDLWpw3UjurNNCEOYAVI/view?usp=sharing
## My Code =
public StackLayout Fill_Fields(string DataJson, StackLayout Design) { StackLayout res = Design; if(DataJson != null) { dynamic Data = JsonConvert.DeserializeObject(DataJson); foreach (var item in res.Children) { if (item.GetType() == typeof(Picker)) { Picker picker = (Picker)item; picker.SelectedItem = null; picker.SelectedItem = Data[picker.ClassId].ToString(); } else if (item.GetType() == typeof(Entry)) { Entry entry = (Entry)item; entry.Text = Data[entry.ClassId].ToString(); entry.SetDynamicResource(StyleProperty, "frmDesignerEntry"); } else if (item.GetType() == typeof(AccountEntry)) { AccountEntry accountEntry = (AccountEntry)item; if (DropdownSelectedItems.Title != null) { accountEntry.PropertyChanging += (object sender, PropertyChangingEventArgs e) => { var m = accountEntry.ClassId.ToString(); var s = accountEntry.Text; accountEntry.Text = DropdownSelectedItems.Title; }; } else { accountEntry.Text = Data[accountEntry.ClassId].ToString(); } } else if (item.GetType() == typeof(DatePicker)) { DatePicker datePicker = (DatePicker)item; DateTime date = new DateTime(); date = Convert.ToDateTime(Data[datePicker.ClassId].ToString()); datePicker.Date = date; datePicker.FontSize = Device.GetNamedSize(NamedSize.Small, typeof(Label)); } else if (item.GetType() == typeof(Editor)) { Editor editor = (Editor)item; editor.Text = Data[editor.ClassId].ToString(); } } } res.Children.Add(Form_Buttons(res, DataJson)); return res; }
↧
↧
Requirements To Build A Simple Chat APP?
I want to build a chatting App. So what are the requirments for it. I mean which server and database will be best for it?Any suggestion plz to build a chatting App?
↧
iPhone/iPad Support w/Geolocation
My iPhone app is working perfect with Geolocation properly setup. When I distribute the app a lot of older iPads aren't compatible because they don't have a GPS sensor. TestFlight indicates "Incompatible Hardware."
The GPS usage in the app is optional, we fallback to zip code search. Is there a way I can support older iPads (with iOS v8+) and iPhones with GPS?
↧
How to Parse JSON Object Array of Data into Views?
Hi,
Well i am knew to Xamarin and confuse of how to parse the JSON object content/array of content into views/component. The purpose of this is that i have a online VPS in the cloud, with MySQL Database there. I put the .php files up and call it using URL to return (in JSON object) the data i query. So, this is what i already know from the web service method:
- Request HttpURLConnection (Build Strings for example: http://101.10.30.890/index.php?hello=20?testing=10/)
- Then my index.php file return JSON object which i can parse (how to parse the object in it?)
- If i'm not mistaken using the Class which extends AsyncTask is the best approach, for example:
class FetchTask extends AsyncTask<String, Void, String>
which includes onPreExecute, During, and OnPostExecute method?
Please correct me if i am wrong, i am just trying to understand how to get the data into my views (Entry and Label for example). I already know how to request the data and return it, what i am missing is how to parse it and put it into my views. Any help is appreciated
Regards,
Kevin
↧
Xamarin.Forms uploading to OneDrive and DropBox
Hi all,
I'm new to Xamarin.Forms. I've created my first app. It has an SQLite database local. I want an option to back this file up to OneDrive and/or DropBox.
Is there a recent example on how to do this? I have searched and found some older ones but I cannot get them to function correctly.
Much appreciate your time.
Thank you
↧
↧
Print the finger print
Today's smart phone have finger print scanner for security purposes.
Is it possible to get the finger print from the device and save it as data or image?
Like this:
Thanks in advance
↧
Weird Pressed shadow in android after updating to XF 2.5
Hello
After upgrading to XF 2.5 I have a weird small shadow on every android button after pressing them.
https: //drive.google.com/open?id =1V3LMp5o1f8hwaPZL3jTA4b8jJToyq-5t
here is a video of what happens after I press a button.
here is the code of the button
<Button HeightRequest="60"
x:Name="CameraButton"
Image="camera_cyan.png"
Clicked="OnCameraClicked"
FontSize="Medium"
CornerRadius="5"
TextColor="{StaticResource Primary}"
BackgroundColor="{StaticResource PrimaryAlternate}"/>
↧
Scrolling issue on UICollectionView
I implemented UICollectionView on my project because the UI requires a card like display. The problem is, when I'm scrolling it I can't scroll it up to the last record. By the way, I put my UICollectionView on top of a UIView that is inside a UIScrollView. Scrolling horizontal on UIScrollView doesn't have any problem. Do I need to adjust the height of my UICollectionView? If yes, how can I achieve it?
↧
Add InsertCommand to dataAdapter with SqliteCommandBuilder
I'm trying to generate InsertCommand to SqliteDataAdapter but got this error:
Unhandled Exception:
System.InvalidOperationException: Dynamic SQL generation is not supported against a SelectCommand that does not return any base table information.
This is my code:
using Mono.Data.Sqlite;
public void Test(){
var dataAdapter = new SqliteDataAdapter();
var dataSet = new DataSet("TestTable");
SqliteCommandBuilder commandBuilder = new SqliteCommandBuilder(dataAdapter);
SqliteConnection connection = new SqliteConnection();
connection.ConnectionString = "Data Source=" + dbPath;
connection.Open();
dataAdapter.SelectCommand = connection.CreateCommand();
//dataAdapter.SelectCommand.CommandText = "SELECT * FROM TestTable";
dataAdapter.SelectCommand.CommandText = "SELECT [ID], [Name] FROM TestTable";
dataAdapter.InsertCommand = commandBuilder.GetInsertCommand(); // ERROR
}
Create table script:
CREATE TABLE `TestTable` (
`ID` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
`Name` TEXT NOT NULL
);
Data in table
1 'Pedro'
Any help?
↧
↧
Best offline maps to use?
Hi
What is the best offline maps to use with Xamarin Android?
I know the answer a few years back was nutiteq. Is this still the case? I think Carto bought Nutiteq.
Is google maps still not supporting offline maps?
I know there is osmsharp. But that is very cumbersome to work with.
Karen
↧
Issue reported while submitting windows app to windows store
I have developed a Xamarin Forms(.Net standard) UWP app and submitted it to windows store, but the windows store team reject the app because of the following issue.
The app doesn’t install on one or more of the currently selected device families due to an unsupported minimum OS version. If the affected device family is not intended to be targeted, then please de-select the unsupported device family and resubmit the app. Otherwise, please change the minimum and/or target OS version that the app supports (https://docs.microsoft.com/en-us/windows/uwp/updates-and-versions/choose-a-uwp-version#choose-which-version-to-use-for-your-app)
My apps min and target versions are Windows 10 Fall Creators Update(10.0; Build 16299). I am targetting my app only for windows 10 desktop devices and Windows 10 mobile devices. So what is the correct min and target versions for my app?
↧
Animation working on Android not working on iOS!
Hi,
I have the following XAML:
<ListView SeparatorVisibility="None" x:Name="Categoriess" IsVisible="True" ItemTapped="Categories_OnItemSelected" HasUnevenRows="False" HorizontalOptions="StartAndExpand">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell Appearing="CategoryMainAppearing" >
<ViewCell.View>
<StackLayout VerticalOptions="Center">
<Grid RowSpacing="25">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="5*"/>
</Grid.ColumnDefinitions>
<forms:CachedImage VerticalOptions="Center" Grid.Column="0" Source="{Binding image}" />
<Label VerticalOptions="Center" Text="{Binding name}" Grid.Column="1" />
<!--<Label Text=" > " FontSize="Medium" Grid.Column="2" />-->
</Grid>
</StackLayout>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
And here is my code behind:
Categoriess.TemplatedItems.Last().Appearing += LastAppered;
private async void LastAppered(object sender, EventArgs e)
{
//await Task.Delay(500);
foreach (var cell in Categoriess.TemplatedItems)
{
var item = (ViewCell)cell;
var children = item.LogicalChildren.ToList();
//await item.View.TranslateTo(500, 0, 7, Easing.SinIn);
await item.View.TranslateTo(0, 0, 200, Easing.SinInOut);
}
}
It is working perfectly fine on Android but on iOS I can't even hit a breakpoint (LastAppeared is not even being called!)
↧
How to show heads up notification?
I was wondering How can i show heads up notification on xamarin android using the plugin Xam.plugins.Notifier.
Thanks
Thanks
↧
↧
Master detail menu drawr width size reduce.
I have to create master detail page and it open menu drawr menu when i tap on menu icon, i have to descreas drawr menu width size , How can i get it please Help.~~~~
↧
Unable to resolve interface type IOnNavigationItemSelectedListener after updated to 3.4.0.1008975
Please help me!
After updated Xamarin.Forms in my Android projekt to 3.4.0.1008975 i get the following error message.
Anyone can help me what is the problem?
The error message:
Unable to resolve interface type 'Android.Support.Design.Widget.BottomNavigationView/IOnNavigationItemSelectedListener'. Are you missing an assembly reference? *****.Android 
\a\1\s\Xamarin.Forms.Platform.Android\AppCompat\TabbedPageRenderer.cs 44
Thanks for everyone!
↧
is there a way to call function from appdelgate?
i dont know if this question difficult or not, but i want to call function from appdelgate to xamarin form, can someone help me figure it out?
↧