Android可旋转ImageView [英] Android Rotatable ImageView

问题描述

我想创建一个可旋转的ImageView，我将指定一定的角度和枢轴点，看到它围绕该枢轴点旋转。我尝试这样：

I am trying to create a Rotatable an ImageView to which I will specify certain angle and pivot point and see it rotated around that pivot point. I tried something like this:

Matrix matrix = new Matrix();
matrix.postRotate(45, imageView.getWidth(), imageView.getHeight());
imageView.setScaleType(ScaleType.MATRIX);
imageView.setImageMatrix(matrix);

但是postRotate方法的参数（第二个和第三个 - 关键点）使NO NO CHANGE 。即使它们是0,0也是一样的。

but the parameters of postRotate method (the second and third - the pivot points) make NO CHANGE at all. even if they are 0, 0 - it's the same thing.

所以我想创建一个ImageView，在初始化时旋转一定角度。在本例中为45度。我尝试设置边界和工作人员..没有帮助。

So I wanna create a ImageView that would be rotated by certain angle when initialized. In this example 45 degrees. I tried setting the bounds and staff.. no help.

我如何做？ ：/

推荐答案

可以使用setRotation（int）旋转ImageView;

You can rotate a ImageView by using setRotation(int);

// rotate imageView 45 around center pivot point
imageView.setPivotX(imageView.getWidth()/2);
imageView.setPivotY(imageView.getHeight()/2);
imageView.setRotation(45);

参考： http： /goo.gl/WhhGM
编辑：我不得不缩短链接，因为a）在url，一些浏览器不喜欢这样。

Reference: http://goo.gl/WhhGM I had to shorten the link because of a ) in the url, some browsers don't like that.

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