从特定的“旋转点”旋转可绘制对象

Question

I have an image, a simple black rectangle. I want to be able to rotate the image from a specific rotation point in it, with a certain amount of degrees provided by the user in a textbox(all this done, keeping the location intact).

illustration of "rotation point"

Answer 1

ImageView has 2 fields that keep coordinates of a pivot point. In your case, only one of them needs to change and that is X coordinate. Here is the working example:

imageView.setPivotX(0);
imageView.setRotation(DEGREES);