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I'm using Android studio and I've setted a background image in this way :

android:background="@drawable/logo"

But the preview screen it's just white, on the phone app I can see the image perfectly. Same thing happens when I've added an image button like this : 

 <ImageButton
        android:id="@+id/image_login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toTopOf="parent"
        app:layout_constraintEnd_toStartOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/login" />

I don't get it. What am I doing wrong? Also I've tried pressing 'R' on the preview view, but when the spinner finished, nothing happened.

Thank you.

Jacopo Sciampi
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1 Answers1

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Invalidating cache and restarting usually solves these for me.

If you're on a mac: File -> Invalidate Caches / Restart...

John Sardinha
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