Background image in constraints layout does not work

Question

I want my app to use a image in the background for signup and signin function. I am using android studio 2.3 and so far I can see that lot many things have changed since last year. Where we used relative or linearlayout now that is constraint layout. I included a code with the root layout as:

android:background="@drawable/wallpaper_2"
    android:orientation="vertical"

Check this image for more information:

When I test this app on my Nexus 5 it does not show anything just a blank screen but the it shows the same image on the preview screen. Any help would be appreciated on this.

Answer 1

The resolution of your image is too large for the device resize your picture to smaller dimesions and based on that put your image into specific drawable folder. e.g : If image size is 1280 x 720 than put image in drawable-xxhdpi folder.