Imageview cropped corners are displaying in white background android code example

Example 1: round corner imageview android

repositories {
    mavenCentral()
}

dependencies {
    compile 'com.makeramen:roundedimageview:2.3.0'
}

Example 2: round corner imageview android

Transformation transformation = new RoundedTransformationBuilder()
          .borderColor(Color.BLACK)
          .borderWidthDp(3)
          .cornerRadiusDp(30)
          .oval(false)
          .build();

Picasso.with(context)
    .load(url)
    .fit()
    .transform(transformation)
    .into(imageView);