android如何用picasso创建圆形图像?

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这个问题已经被问到,并且我正在使用的Picasso版本已经有了一个承诺:如何使用Picasso将循环位图发送到ImageView?

Picasso.with(context).load(url).resize(w, h).into(imageview);

我已经找到https://gist.github.com/julianshen/5829333,但我不知道如何以非尴尬的方式将它与上面的行结合起来。

提问于
用户回答回答于

你可以尝试下这段代码:

import com.squareup.picasso.Transformation;

public class CircleTransform implements Transformation {
    @Override
    public Bitmap transform(Bitmap source) {
        int size = Math.min(source.getWidth(), source.getHeight());

        int x = (source.getWidth() - size) / 2;
        int y = (source.getHeight() - size) / 2;

        Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
        if (squaredBitmap != source) {
            source.recycle();
        }

        Bitmap bitmap = Bitmap.createBitmap(size, size, source.getConfig());

        Canvas canvas = new Canvas(bitmap);
        Paint paint = new Paint();
        BitmapShader shader = new BitmapShader(squaredBitmap,
                BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
        paint.setShader(shader);
        paint.setAntiAlias(true);

        float r = size / 2f;
        canvas.drawCircle(r, r, r, paint);

        squaredBitmap.recycle();
        return bitmap;
    }

    @Override
    public String key() {
        return "circle";
    }
}

那么只需将其应用为:

Picasso.with(activity).load(mayorShipImageLink).transform(new CircleTransform()).into(ImageView);
用户回答回答于

这里是由support-v4库提供的东西!无需推出自己的产品:

Picasso.with(context).load(url)
                        .resize(w, h)
                        .into(myImageView, new Callback() {
                            @Override
                            public void onSuccess() {
                                Bitmap imageBitmap = ((BitmapDrawable) myImageView.getDrawable()).getBitmap();
                                RoundedBitmapDrawable imageDrawable = RoundedBitmapDrawableFactory.create(getResources(), imageBitmap);
                                imageDrawable.setCircular(true);
                                imageDrawable.setCornerRadius(Math.max(imageBitmap.getWidth(), imageBitmap.getHeight()) / 2.0f);
                                myImageView.setImageDrawable(imageDrawable);
                            }
                            @Override
                            public void onError() {
                                myImageView.setImageResource(R.drawable.default_image);
                            }
                        });

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