如何旋转触摸图像

问题描述

我正在尝试开发一个具有像图像一样的旋转拨盘的应用程序，我需要在触摸时旋转它.

我尝试搜索，但是发现了很多复杂的方程式，这些方程式我无法弄清:(

谁能帮助我:(

Hi,

i m trying to develop an application that has a rotary dial like image and i need to rotate it on touch.

i tried searching but got a lot of complex equations which i cant figure out :(

can anybody help me :(

推荐答案

Matrix nwMat = new Matrix();
nwMat.postTranslate(200,200);
        Bitmap redrawnBitmap1 = Bitmap.createBitmap(bitmap1, 0, 0, bitmap1.getWidth(), bitmap1.getHeight(), nwMat, true);
        ServerImage.setImageBitmap(redrawnBitmap1);  

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