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Created February 10, 2014 10:10
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Picasso Transformation that transforms the image in a Circle
package com.example.picassodemo;
import com.squareup.picasso.Transformation;
* Created by julian on 13/6/21.
public class CircleTransform implements Transformation {
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) {
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);
float r = size/2f;
canvas.drawCircle(r, r, r, paint);
return bitmap;
public String key() {
return "circle";
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