如何旋转触摸图像 [英] How to rotate an image on touch

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

本文可以根据您的需要进行修改； ^ ].

希望这会有所帮助，
Fredrik

This article can be adapted to do what you want; Simple Gestures on Android[^].

Hope this helps,
Fredrik

我仍在尝试解决上述问题..
在PostTranslate下面的代码中不会对位图进行任何更改..
请帮我弄错地方:''(

i am still trying with the above problem..
in the Code below the PostTranslate does not create any change to the bitmap..
kindly help as to where i am goin wrong :''(

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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