Resize image to full width and variable height with Picasso

Question

I have a listView with an adapter that contains ImageView of variable size (width and height). I need resize the pictures load with Picasso to the max width of

Answer 1

May Accepted Answer is Useful to all but If you are binding Multiple ViewHolder for Multiple Views then you can reduce your code by Creating Class for Transformation and passing ImageView from ViewHolder.

/**
 * Created by Pratik Butani
 */
public class ImageTransformation {

    public static Transformation getTransformation(final ImageView imageView) {
        return new Transformation() {

            @Override
            public Bitmap transform(Bitmap source) {
                int targetWidth = imageView.getWidth();

                double aspectRatio = (double) source.getHeight() / (double) source.getWidth();
                int targetHeight = (int) (targetWidth * aspectRatio);
                Bitmap result = Bitmap.createScaledBitmap(source, targetWidth, targetHeight, false);
                if (result != source) {
                    // Same bitmap is returned if sizes are the same
                    source.recycle();
                }
                return result;
            }

            @Override
            public String key() {
                return "transformation" + " desiredWidth";
            }
        };
    }
}

Calling from ViewHolder:

Picasso.with(context).load(baseUrlForImage)
                     .transform(ImageTransformation.getTransformation(holder.ImageView1))
                     .error(R.drawable.ic_place_holder_circle)
                     .placeholder(R.drawable.ic_place_holder_circle)
                     .into(holder.mMainPhotoImageView1);

Hope it will Help you.