How to listen for Picasso (Android) load complete events?
JavaAndroidPicassoJava Problem Overview
Is there a way to listen for events from Picasso when using the builder like:
Picasso.with(getContext()).load(url).into(imageView);
I'm trying to call requestLayout()
and invalidate()
on the parent GridView
so it'll resize properly but I don't know how to set a listener or callback.
I see that Picasso has error event reporting, but is there a success event?
Java Solutions
Solution 1 - Java
You can use a Callback
to get onSuccess and onError events. Just add a new Callback to your request like so:
Picasso.with(getContext())
.load(url)
.into(imageView, new com.squareup.picasso.Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
}
});
Then you can perform any alterations and modifications in the onSuccess callback.
Solution 2 - Java
If you need to access the bitmap before it is loaded to the view, try using :
private Target target = new Target() {
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
}
@Override
public void onBitmapFailed() {
}
}
In the calling method:
Picasso.with(this).load("url").into(target);
Ideally you'd implement Target on a view or view holder object directly.
Hope this helps
Solution 3 - Java
Answering @Jas follow up question as a comment to MrEngineer13's answer (since I don't have enough reputation to comment in any answer), you should use the error()
method prior to registering the Callback
at the into()
method, for example:
Picasso.with(getContext())
.load(url)
.error(R.drawable.error_placeholder_image)
.into(imageView, new com.squareup.picasso.Callback() {
@Override
public void onSuccess() {
//Success image already loaded into the view
}
@Override
public void onError() {
//Error placeholder image already loaded into the view, do further handling of this situation here
}
}
);
Solution 4 - Java
Square lately has updated Target class and now there are more methods to override (onPrepareLoad
and onBitmapFailed
):
Target target = new Target() {
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
}
@Override
public void onBitmapFailed(Drawable errorDrawable) {
}
@Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
};
And you still have to use:
Picasso.with(context).load(url).into(target);
Solution 5 - Java
private final Callback mImageCallback = new Callback() {
@Override
public void onSuccess() {
startPostponedEnterTransition();
}
@Override
public void onError() {
startPostponedEnterTransition();
}
};
RequestCreator creator = Picasso.with(getActivity()).load(list.get(position).getId());
creator.into(imageView, mImageCallback);
Solution 6 - Java
Try This
Picasso.with(context)
.load(services.get(position).getImageInactive())
.into(holder.icon, new Callback() {
@Override
public void onSuccess() {
holder.imageLoad.setVisibility(View.GONE);
}
@Override
public void onError() {
holder.icon.setImageResource(R.drawable.ic_error_image_load);
}
});
Solution 7 - Java
As a complement to other answers, in case you don't know where to use original image view, e.g. ImageView myIV
:
Original:
Picasso.with(activity).load(url).into(myIV);
New (inside onBitmapLoaded()
of new Target()
):
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
myIV.setImageBitmap(bitmap);
}