Android – how to bind mvvmcross to drawviewid to ImageView

How to return drawableid in the converter?

My layout file:

<ImageView
    android:id="@+id/imgTest"
    android:src="@drawable/Img_Test"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"    
    android:maxHeight="80dp"
    android:maxWidth="80dp"   
    android:layout_margin="20dp"   
    android:scaleType="fitCenter"
    local:MvxBind ="DrawableId MySwapImage(true)" />

I have two images in the resource folder

> ImgTest1.png > ImgTest2.png

My value converter:

public class MySwapImageValueConverter : MvxValueConverter<bool, int>
{
    protected override int Convert(bool value, Type targetType, object parameter, CultureInfo culture)
    {
        if(value)
        {
            // ImgTest1
        }
        else
        {
            // ImgTest2
        }
    }
}

resolvent:

Your problem is that this converter should not be located in your. Core project (the project where your VM is located). This code is platform specific because it changes the Boolean value (content related to business logic) to drawable (content existing only on Android). Therefore, it should belong to your. Droid project

In my project, I create a converters folder in the droid project to store all my platform specific converters. The code of myswapimagevalueconverter should be as follows

using System;
using System.Globalization;

using CirrIoUs.Crosscore.Converters;

namespace MilkBottle.Droid.Converters
{
    public class MySwapImageValueConverter : MvxValueConverter<bool, int>
    {
        #region Methods

        protected override int Convert(bool value, Type targetType, object parameter, CultureInfo culture)
        {
            var result = value ? Resource.Drawable.ImgTest1: Resource.Drawable.ImgTest2;
            return result;
        }

        #endregion
    }
}