NullpointerException when starting activity

[olavbg]

I have followed the description in the Readme, declaring the activity in the manifest, putting the required extras (with ArrayList og string urls) and implementing ImageGalleryAdapter.ImageThumbnailLoader and FullScreenImageGalleryAdapter.FullScreenImageLoader in my calling activity.

But I get a NPE from com.etiennelawlor.imagegallery.library.activities.ImageGalleryActivity.loadImageThumbnail(ImageGalleryActivity.java:101) where the imageThumbnailLoader is NULL.

Am I doing something wrong?

StackTrace: https://gist.github.com/olavbg/e19fdc38700d83b3d90e9e1ddf7340d6

• Olav Blaaflat

[manijak]

I'm getting the same exception. How do we properly set the loaders, and why is this mandatory all of a sudden?

[lawloretienne]

Take a look at MainActivity

https://github.com/lawloretienne/ImageGallery/blob/3e1ed255012a99aa1a245c2aa384eeb216d22370/sample/src/main/java/com/etiennelawlor/imagegallery/activities/MainActivity.java

I am calling

ImageGalleryActivity.setImageThumbnailLoader(this);

and then I am implementing the ImageGalleryAdapter.ImageThumbnailLoader interface in MainActivity.

Do you have all of this setup?

[olavbg]

After adding these lines it works again:

ImageGalleryActivity.setImageThumbnailLoader(this);
FullScreenImageGalleryActivity.setFullScreenImageLoader(this);

Should probably point these out in the readme as well?

Cheers!

[lawloretienne]

in the README there is a section titled important note which calls attention to that.

[antonioreyna]

i had this same problem but just to mention that the readme jjust says

Important Note

You must now set up image loading by implementing these interfaces ImageGalleryAdapter.ImageThumbnailLoader and FullScreenImageGalleryAdapter.FullScreenImageLoader. See

never mention about the methods to set the this

Thanks!!