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This looks awesone!

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Where is this taken?

There are trumpers that read the bible. I always wonder what goes through their heads when they read the teachings of Jesus.

It failed lemmys rigid purity test.

I would try app:src or adding

 android {  
   defaultConfig {  
     vectorDrawables.useSupportLibrary = true  
    }  

To your build.gradle

https://stackoverflow.com/questions/40624554/difference-between-appsrccompat-and-androidsrc-in-androids-layout-xml

May be relevent to your issue

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Type package:mine level:error in the text bar and see if any errors are returned.

And what is the path of your image, and how are you placing the image in your xml file? Here is an example of one that works for me with an image that is located in the res/drawable/baseline_arrow_back_24.xml package

  <ImageView
        android:id="@+id/backButton"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:layout_gravity="start"
        android:layout_centerVertical="true"
        android:src="@drawable/baseline_arrow_back_24"
        android:contentDescription="@string/back_arrow" />

Do any errors show in logcat? You should be able to filter to show errors only.

Is it not showing up in the emulator, or the phone on which the app is downloaded, or both?

I would like to see nuclear power grow in use.

Exactly, and it seems like that is a realistic outcome.

I would love to see large and small scale nuclear reactors become more common.

I am suprised to see all the negativity. I for one think this is awesome and would love to see SMRs become more mainstream.

Yes, as annoying as apps for everything is, very few are necessary, or even useful. I have had no problem going though life with minimal apps.

What a mood!

Oppression leads to violence

I got in the habit of backing into parking spaces after I had a car that needed a jump start, but I had pulled in and no spaces next to me were available to pull the jumper car into. If you back in, in the rare chance you need a jump start, you will be able to drive the jumper car close to your battery