I have created a button in my xamarin application and have added an icon to it but there is too much of padding between the icon and the text as shown in the screenshot below.
How can I reduce this space between the two?
I have learnt about the custom renders for Xamarin.Android but its not working for me.
Following is the code for my custom renderer
[assembly: ExportRenderer(typeof(Button), typeof(ZeroPaddingRenderer))]
namespace MyApp.Droid
{
class ZeroPaddingRenderer : ButtonRenderer
{
protected override void OnElementChanged(ElementChangedEventArgs<Button> e)
{
base.OnElementChanged(e);
Control.SetPadding(0, Control.PaddingTop, 0, Control.PaddingBottom);
}
}
}
Here is the code for button
Button btn_login = new Button
{
VerticalOptions = LayoutOptions.Center,
Text = "Login",
};
btn_login.Image = "login.png";
Any help will be appreciated.
Related
I want to make a button that has a small icon (from FontAwesome) and text on it in my Xamarin app. I know I can just make a button but the problem is that I will require two fonts (the standard font for text and FontAwesome for the icon). Would anyone happen to know how I can do this, or if there is another way to achieve what I want?
Thanks!
As the json mentioned, I just made a simple implementation.
Create a new class inherit from Label, set FormattedText to combine the string(standard and icon), and add tap gesture on it .
public class MyLabel : Label
{
public delegate void MyHandler(object sender, EventArgs e);
public event MyHandler myEvent;
public MyLabel(string _myIcon, string _myText)
{
//build the UI
FormattedString text = new FormattedString();
text.Spans.Add(new Span { Text = _myIcon ,FontFamily= "FontAwesome5Free-Regular" });
text.Spans.Add(new Span { Text = _myText, TextColor = Color.Red ,BackgroundColor = Color.Blue });
FormattedText = text;
//tap event
TapGestureRecognizer tap = new TapGestureRecognizer();
tap.Tapped += (sender,e) => {
myEvent(sender,e);
};
}
}
Usage
MyLabel label = new MyLabel("", "test");
label.myEvent += (sener,e) =>
{
//do something when tapping
};
Content = label;
For how to integrate FontAwesome in Xamarin.Forms ,refer to
https://montemagno.com/xamarin-forms-custom-fonts-everywhere/.
This is my code
ToolbarItems.Add(new ToolbarItem("User", "userAvatar.png", async () => {
await Navigation.PopToRootAsync();
}));
It's not working. It's place a masked single color image instead a png in colors.
I'm trying to archive something like this...
Any clue ?
I was going mad about this issue once, too (my situation was a bit more subtle, I had a plain and a colored verion of the icon and was wondering why the heck the colored icon would not be loaded) and unfortunately it's not that easy to overcome.
The icons being monochrome is the default behavior for iOS apps and Xamarin.Forms implements this behavior. According to this post you'll need a custom renderer to show colored icons in the navigation bar.
Edit
According to this post, you'll have to set the UIImageRenderingMode for the respective images in your custom renderer
image = image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
using the renderer implementation from this answer, it should be something in the line of
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
[assembly: ExportRenderer(typeof(TabbedPage), typeof(MyProject.iOS.Renderers.IosMainMenuRenderer))]
namespace MyProject.iOS.Renderers {
public class IosMainMenuRenderer : TabbedRenderer {
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
var items = TabBar.Items;
for (var i = 0; i < items.Length; i++) {
items[i].Image = items[i].ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
items[i].SelectedImage = items[i].SelectedImage.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
}
}
}
}
but I have not tested this!
For a color logo on the right on all my navigation pages I used this custom renderer:
[assembly: ExportRenderer(typeof(CustomNavigationPage), typeof(CustomNavigationRenderer))]
namespace App.iOS
{
public class CustomNavigationRenderer : NavigationRenderer
{
public override void ViewDidLayoutSubviews()
{
base.ViewDidLayoutSubviews();
var logo = NavigationBar.TopItem.RightBarButtonItem.Image;
if (logo == null) return;
if (logo.RenderingMode == UIImageRenderingMode.AlwaysOriginal)
{
return;
}
NavigationBar.TopItem.RightBarButtonItem.Image = logo.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
}
}
}
The easiest way is to not use a toolbar, instead, set the type of this page as a Modal when navigating to it(Using Navigation.PushModal()). And add a horizontal LinearLayout that will act as the toolbar.
I am working with search bar in xamarin forms. I am not able to remove search text in search bar by clicking cross button. I am using custom renderer for remove cancel text in search bar. When I am using that renderer I am not able delete the text, If I remove that renderer it work's fine. what the wrong I have done in renderer file. Here is the sample code in renderer for hide the cancel button beside the search bar.
Renderer Sample code:
protected override void OnElementPropertyChanged(object sender, PropertyChnagedEventArgs e)
{
Control.ShowCancelButton = false;
}
When I try to remove text in search bar by clicking cross image in search bar it's not working in xamarin ios but it's working fine in ios.
Sample code :
<StackLayout Grid.Column = "0" Orientation = "Horizontal">
<Image Source = "backarrow.png" HorizontalOptions = "StartAndExpand" VerticalOptions = "CenterAndExpand" />
<controls:CustomSearchbar x:Name = "CustomSearchbar" BackgroundColor ="Transparent" Text ="{Binding SearchTag}" SearchCommand ="{Binding RestaurantSearchCommand}" GHorizontalOptions = "StartAndExpand" VerticalOptions = "CenterAndExpand" >
Here is the code I am using for search bar. Here 'customsearchbar' class is inherited from searchrenderer.
It works fine for me.
Here's my code for example:
MySearchBar.cs in PCL:
using Xamarin.Forms;
namespace Kevin_XF
{
public class MySearchBar : SearchBar
{
}
}
MySearchBarRenderer.cs in iOS platform:
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
using Kevin_XF.iOS;
using Kevin_XF;
using System.ComponentModel;
[assembly: ExportRenderer(typeof(MySearchBar),typeof(MySearchBarRenderer))]
namespace Kevin_XF.iOS
{
public class MySearchBarRenderer: SearchBarRenderer
{
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (Control != null)
{
Control.ShowsCancelButton = false;
}
}
}
}
Xaml code in MainPage.xaml:
<StackLayout>
<local:MySearchBar x:Name = "CustomSearchbar" BackgroundColor ="Transparent" HorizontalOptions = "StartAndExpand" VerticalOptions = "CenterAndExpand" />
</StackLayout>
It works like this:
I am picking a photo from photo library and i get the following
AlbumPath:
assets-library://asset/asset.JPG?id=106E99A1-4F6A-45A2-B320-B0AD4A8E8473&ext=JPG
Path:
/Users/myname/Library/Developer/CoreSimulator/Devices/21CB035B-A738-4F74-B121-2DB2A6B5372A/data/Containers/Data/Application/3081A323-98AF-4EF6-95B9-29D4C2CD8425/Documents/temp/IMG_20170408_111143.jpg
How do i assign this image to a button ? I tried the following.
var file = await CrossMedia.Current.PickPhotoAsync(
new Plugin.Media.Abstractions.PickMediaOptions
{
});
Button btn = new Button();
btn.Image = (Xamarin.Forms.FileImageSource)ImageSource.FromFile(file.Path);
No image is displayed on the button. Any help help is appreciated.
Thank you.
Once you deploy the application the app will not have access to your mac. For the application to use the picture it will need to be a bundled resource within the iOS application. Below is a simple example of using images within an iOS app. You'll definitely want to consider just adding a gesture listener to your image instead of making it a button though. If you try to just use the image on a button you'll have to do some styling adjustments to get it to look clean.
Image Setup
Put image in iOS Resource folder
Make sure bundledresource is selected from image properties.
Image Button
public class ImageButton : ContentPage
{
private Button _imageBtn = new Button { Image = "icon.png", Text = "Sample button" };
public ImageButton()
{
Content = new StackLayout
{
Children =
{
_imageBtn
}
};
}
}
Image with TapGesture
public class ImageButton : ContentPage
{
private Image _imageBtn = new Image { Source = "icon.png" };
private TapGestureRecognizer _imageTap = new TapGestureRecognizer();
public ImageButton()
{
_imageBtn.GestureRecognizers.Add(_imageTap);
Content = new StackLayout
{
Children =
{
_imageBtn
}
};
_imageTap.Tapped += (s, e) =>
{
// handle the tap
};
}
}
I have an Entry in my ContentPage and am doing rendering in Xamarin Android.
Here my problem is EditText background color is white and cursor color is also white.
Here I want to change the cursor color to black.
Is there any way to change the cursor color?
Here is my code.
Entry to ExtendedEntry :
public class ExtendedEntry : Entry { }
Use ExtendedEntry in Content Page :
var txtPhoneNumber = new ExtendedEntry { Placeholder = "Phone Number", Keyboard = Keyboard.Numeric, TextColor = Color.Black };
Render the ExtendedEntry in Xamarin Android :
using Xamarin.Forms.Platform.Android;
using Xamarin.Forms;
[assembly: ExportRenderer(typeof(ExtendedEntry), typeof(ExtendedEntryRender))]
namespace Project.Droid
{
public class ExtendedEntryRender : EntryRenderer
{
// Override the OnElementChanged method so we can tweak this renderer post-initial setup
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{ // perform initial setup
// lets get a reference to the native control
var nativeEditText = (global::Android.Widget.EditText)Control;
// do whatever you want to the textField here!
nativeEditText.SetBackgroundResource(Resource.Drawable.text_box);
}
}
}
}
Can any one help me to solve this problem?
Thanks in advance.
You can change the cursor color using:
IntPtr IntPtrtextViewClass = JNIEnv.FindClass(typeof(TextView));
IntPtr mCursorDrawableResProperty = JNIEnv.GetFieldID (IntPtrtextViewClass, "mCursorDrawableRes", "I");
JNIEnv.SetField (Control.Handle, mCursorDrawableResProperty, 0); // replace 0 with a Resource.Drawable.my_cursor
0 will keep the same color as the TextColor on your Entry.
Edit: To change the cursur color the only option is to change the theme by adding for example:
Theme = "android:style/Theme.Holo.light" in MainActivity