挣扎在MvvmCross的MvxImageView结合本地图片 [英] Struggling to bind local images in an MvxImageView with MvvmCross

问题描述

我似乎无法让图像在MvxListView正确绑定

I can't seem to get images to bind properly in an MvxListView

下面是模板：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:local="http://schemas.android.com/apk/res-auto"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Mvx.MvxImageView
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_margin="10dp"
        local:MvxBind="ImageUrl IconName, Converter=IconSource" />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textSize="30dp"
            local:MvxBind="Text Name" />
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textSize="20dp"
            local:MvxBind="Text Description" />
    </LinearLayout>
</LinearLayout>

下面是转换器：

public class IconSourceValueConverter : MvxValueConverter<string, string>
{
    protected override string Convert(string value, Type targetType, object parameter, CultureInfo culture)
    {
        //string retval = string.Format("res:{0}", value.ToLower());
        string retval = string.Format("@drawable/{0}", value.ToLower());
        return retval;
    }
}

所有的图像都present在绘制对象文件夹。

All the images are present in the Drawable folder.

我都尝试绘制和资源，并没有工作。

I tried both drawable and res and neither work.

我更换了MvxImageView用含有硬codeD Android的一个普通的ImageView：src和它工作得很好

I replaced the MvxImageView with a plain ImageView containing a hard coded android:src and it worked fine.

任何想法？

推荐答案

我已经使用这个，使其为我工作：

I have used this to make it work for me:

public class StringToIntValueConverter : MvxValueConverter<string, int>
            {
                protected override int Convert(string value, Type targetType, object parameter, CultureInfo culture)
                {
                    int image = 0;
                    if(value == "song")
                        image = Resource.Drawable.icon_category_song;

                    return image;
                }
            }

要在Android布局中使用这样的：

To use this in the Android layout:

<ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        local:MvxBind="DrawableId StringToInt(Type)" />

在这个例子中的类型是包含单词歌曲。

In this example "Type" is a string containing the word "song".

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