圆角图片最简单实现方式

• 重写iamgeview 的下边两个方法，轻松实现任意圆角
  ` @Override
  public void setImageDrawable(@Nullable Drawable drawable) {
  if (drawable != null && drawable instanceof BitmapDrawable) {
  Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
  setImageBitmap(bitmap);
  } else {
  super.setImageDrawable(drawable);
  }
  }

@Override public void setImageBitmap(Bitmap bm) {
    //super.setImageBitmap(bm);
    RoundedBitmapDrawable drawable = RoundedBitmapDrawableFactory.create(
            getResources(), bm);
    drawable.setCornerRadius(36);
    setImageDrawable(drawable);
}`