Using picasso library with a circle image view

Question

I am looking at using the Picasso library to download an image from URL and pass this into circle image view, but since picasso requires that you pass in an actual imageView

Answer 1

I have created a target class that uses native Android's RoundedBitmapDrawable class to make image round (removes the need to add a circle transform class to code), see solution below:

public class RoundedImageBitmapTarget implements Target {

    private final Context context;
    private final ImageView view;

    public RoundedImageBitmapTarget(Context context, ImageView view) {
        this.context = context;
        this.view = view;
    }

    @Override
    public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
        setBitmap(bitmap);
    }

    @Override
    public void onBitmapFailed(Drawable errorDrawable) {
        setBitmap(((BitmapDrawable) errorDrawable).getBitmap());
    }

    @Override
    public void onPrepareLoad(Drawable placeHolderDrawable) {
        setBitmap(((BitmapDrawable) placeHolderDrawable).getBitmap());
    }

    public void setBitmap(Bitmap bitmap) {
        view.setImageDrawable(getRoundBitmap(context, bitmap));
    }

    public static RoundedBitmapDrawable getRoundBitmap(Context context, Bitmap bitmap) {
        Resources res = context.getResources();
        RoundedBitmapDrawable round = RoundedBitmapDrawableFactory.create(res, bitmap);
        round.setCircular(true);
        round.setTargetDensity(context.getResources().getDisplayMetrics());
        return round;
    }

    public static void load(Context context, ImageView view, String url, int size, @DrawableRes int placeholder) {
        RoundedImageBitmapTarget target;
        Picasso.with(context).load(url)
                .resize(0, size)
                .placeholder(placeholder)
                .error(placeholder)
                .into(target = new RoundedImageBitmapTarget(context, view));
        view.setTag(target);
    }

}