setScaleType() is useless

[zhanghq666]

I want to set my ImageViewTouch's scale type to CENTER_CROP by mPreviewIv.setScaleType(ImageView.ScaleType.CENTER_CROP), but it's useless. And, ImageViewTouchBase.DisplayType do not have similar enum value

[liangxiwei]

you should set it yourself like this.

int dwidth = imageInfo.getDrawable().getCurrent().getIntrinsicWidth(); int dheight = imageInfo.getDrawable().getCurrent().getIntrinsicHeight(); int vwidth = size.x; int vheight = size.y; float scale; float dx = 0, dy = 0; if (dwidth * vheight > vwidth * dheight) { scale = (float) vheight / (float) dheight; dx = (vwidth - dwidth * scale) * 0.5f; } else { scale = (float) vwidth / (float) dwidth; dy = (vheight - dheight * scale) * 0.5f; } Matrix matrix = new Matrix(); matrix.postScale(scale, scale); matrix.postTranslate(dx, dy); image.setImageDrawable(imageInfo.getDrawable().getCurrent(), matrix, 0.5f, scale * 8);