找不到与给定名称匹配的资源（在'src'处，值为'@android：drawable / logo.png

Question

Firstly I am a beginner, learning to code by myself. I am using Visual Studio Xamarin to create an android app. I am trying to put assign an image called logo.png to an imageview. I do not have a drawable file under the Resources file so I added a folder, named it 'drawable'. I then pasted the logo.png. The xml code for the imageview:

<ImageView
    android:src="@android:drawable/logo.png"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/imageView1" />

I have not modified any java/ C# files. Some of the unusual folders that I have under resources include mipmap-anydpi, mipmap-hdpi, mipmap-mdpi, mipmap-xhdpi, mipmap-xxhdpi, mipmap-xxxhdpi. I tried having the logo.png on all these folders and tried to build with the same xml code but no improvements. (btw I nearly do not know any xml). and in this case it says activity_main.axml compared to how it is on the Android Studio which has the name activity_main.axml. Does this have anything to do with the problem? I am following this tutorial by the way: https://youtu.be/WBTZ7TSan_E

Answer 1

If you puted the logo.png :

on src/drawable/ use @drawable/logo.png

if on src/mipmap/ use @mipmap/logo.png

Why not @android: ?

This path point to android resources, are default files, belongs to Android SDK

Answer 2

Android OS has its own resources, like color variables, default dimensions, themes etc.

If you use some internal drawable resources that exist in your phone, then you use:

android:src="@android:drawable/..."

If you use the resources that you add in your app, in your folder drawable , then use:

android:src="@drawable/..."

It's important to remember that, as you will run into that quite often.