Glide assert: java.lang.IllegalArgumentException: You must call this method on the main thread

Question

Has anyone used Glide to fetch images from a background thread? I keep getting this assert:

java.lang.IllegalArgumentException: You must call this method on the main thread

but according to this thread, it should work:

https://github.com/bumptech/glide/issues/310

Yet, I cannot get it to work, unless I call it from the main thread.

Here's is what I am trying to do from the main thread:

    Glide.get(mContext);
    loadUserImage(userImageUrl);

    // wait 5 seconds before trying again
    int imageLoadingTimeOut = mContext.getResources().getInteger(R.integer.image_loading_time_out);
    if (imageLoadingTimeOut > 0) {
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                if (!mUserImageLoaded) {
                    loadUserImage(userImageUrl);
                }
            }
        }, imageLoadingTimeOut);
    }
}

and the loadUserImage:

private boolean mUserImageLoaded = false;

private void loadUserImage(String userImageUrl) {

    if (userImageUrl != null && !userImageUrl.isEmpty() && !mUserImageLoaded) {
        Glide.with(mContext).using(Cloudinary.getUrlLoader(mContext)).load(userImageUrl).crossFade().listener(new RequestListener<String, GlideDrawable>() {

            @Override
            public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
                return false;
            }

            @Override
            public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
                mImageMessageContent.invalidate();
                mUserImageLoaded = true;
                return false;
            }
        }).into(mImageMessageContent);

    } else {
        mImageMessageContent.setVisibility(View.GONE);
    }
}

and mContext is just the activity "this" pointer.

Anyway, can I use Glide from a thread different than main?

Answer 1

Update image in main ui thread

runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Glide.with(MainActivity.this)
                                    .load("image URL")
                                    .into(imageView);
                        }
                    });

Answer 2

The into(ImageView) method of Glide requires you to call it only on main thread, but when you pass the loading to a Timer it will be executed in a background thread.

What you can do is to retrieve a bitmap by calling get() instead of into() and then set that bitmap on the ImageView by calling setImageBitmap().

Glide.with(getApplicationContext())
     .load("your url")
     .asBitmap()
     .into(new BitmapImageViewTarget(imgView) {
      @Override
      protected void setResource(Bitmap resource) {
       //Play with bitmap
        super.setResource(resource);
      }
    });

You can also take a look at this document for more information.

Answer 3

Posting the code just in case it helps someone.

Bitmap myBitmap = Glide.with(applicationContext)
        .load(yourUrl)
        .asBitmap()
        .centerCrop()
        .into(Target.SIZE_ORIGINAL,Target.SIZE_ORIGINAL)
        .get()
imageView.setImageBitmap(myBitmap);