2021.02.04.

Xamarin.Forms save and read objects

Download this Package to your .NET Standard Library: https://www.nuget.org/packages/Xam.Plugins.Settings/ If you don’t downloaded the Newtonsoft.Json Package yet, please add this package too. After the installations, we can save and read any object in your application: Save: Read: Hints: If you get some error during de serialization, you may can’t serialize your object because of some property (Xamarin.Forms.Color, View, or any Bindible object, etc…). Because of […]

2020.12.17.

Xamarin.MQTT

https://github.com/officialdoniald/Xamarin.MQTT NuGet Gallery | Xamarin.MQTT 1.0.0 Usage: I created two contructors of the MQTTConnection class. You can init this object with a specific MqttClientOptions and a string array of your topics, or with username, passowrd, a string array of your topics, servername, port and clientid. https://github.com/officialdoniald/Xamarin.MQTT/blob/master/Xamarin.MQTT.Example/Xamarin.MQTT.Example/App.xaml.cs I created in the App.cs a static variable of the MQTTConnection class, so I can reach this object anywhere. […]

2020.12.16.

Xamarin.Forms.SaveOpenPDFPackage

Xamarin.Forms.Save.Open.PDF/README.md at master · officialdoniald/Xamarin.Forms.Save.Open.PDF (github.com) NuGet Package: https://www.nuget.org/packages/Xamarin.Forms.SaveOpenPDFPackage/ Download this Package just in your Standard Library. Platform specific things: Android: In the AndroidManifest.xml file, you have to add theese lines: https://github.com/officialdoniald/Xamarin.Forms.Save.Open.PDF/blob/master/Xamarin.Forms.Save.Open.PDF/Xamarin.Forms.Save.Open.PDF.Android/Properties/AndroidManifest.xml Create, if you don’t create yet, an “xml” folder into the “Resources” folder in the Android Project, and create an xml file, and call it: “provider_paths.xml”. The file should contain: https://github.com/officialdoniald/Xamarin.Forms.Save.Open.PDF/blob/master/Xamarin.Forms.Save.Open.PDF/Xamarin.Forms.Save.Open.PDF.Android/Resources/xml/provider_paths.xml Android ready, let’s go […]

2020.12.11.

Xamarin.Forms.DynamicSize

officialdoniald/Xamarin.Forms.DynamicSize (github.com) NuGet Package: NuGet Gallery | Xamarin.Forms.DynamicSize 1.0.0 What and when should this package be used? If you’re making a design plan and you only made it to one size and you gave everything a fixed size, so this little package is for you. This can dynamically increase the size no matter what resolution device you are running on. You don’t have to worry […]

2020.11.26.

Xamarin.Forms.MVVM

officialdoniald/Xamarin.Forms.MVVM This Package implement the https://docs.microsoft.com/en-us/xamarin/xamarin-forms/enterprise-application-patterns/dependency-injection TinyIoC Container. => You can use DI in your code. Naming convention is very important!!! MVVM: You have to create the common folders: Model, View and ViewModel. Model: Not nessessary to create this folder, but the nice thing would be to make a separate folder for UI models. If you want to Bind a model’s Property, you have to derive your […]

2020.09.01.

Xamarin.Android – Bottom Bubble TabBar

Suppose we use an Activity and swap Fragments within the Activity. Within Acitvity, use RelativeLayout for External Layout and we will place it at the bottom, centering our menu. Set the Bottom menu as rounded View at: android:background=”@xml/bottom_menu” In the first rectangle I set a little shadow of the menu, but it is not necessary, if you dont want shadow just use this code in […]

2020.09.01.

Xamarin.Android – Rounded corner of View

Android don’t have rounded corner property, so we have to define a shape in an xml and we have to set this xml as a background of a View. Let’s define our rounded corner in the Resource/drawable folder: rounded.xml. If we want a different radius or different color, just change the android:radius or android:color property. Next, we have to set this as a background of […]

2020.09.01.

Xamarin.Android – Shadow

In Android you can’t set shadow property of an element except Button and TextView. So we have to define a shape in an xml and set is as background of an element. Let’s create our first shadow background! Create a shadow.xml file in the Resource/drawable folder, and paste this code in the file. After that, we have to set this drawable as the background of […]

2020.09.01.

Xamarin.Android – Automatic Grid Height

We all use usually grids in our apps. But it doesn’t matter how it appears. Here now it’s not going to be about having a grid and exposing it to a page and just going to be there, but there’s more of everything on a page and you don’t want to have a certain height and be able to scroll through a small area but […]

2020.09.01.

Xamarin.Android – Automatic ListView Height

We all use lists in our apps. But it doesn’t matter how it appears. Here now it’s not going to be about having a list and exposing it to a page and just going to be there, but there’s more of everything on a page and you don’t want to have a certain height and be able to scroll through a small area but be […]