如何在不损失分辨率的情况下放大和缩小位图？

发布于 2024-09-29 19:23:32 字数 384 浏览 1 评论 0原文

我正在尝试实现捏缩放并且它正在工作，但是当我缩小然后再次放大时，图像（位图）的分辨率会降低。我知道这只是我的代码的正常行为，我想知道如何以正确的方式做到这一点。

这是相关代码：

Matrix matrix = new Matrix() ;
float scale = newDist / oldDist;
matrix.postScale(scale, scale, mid.x, mid.y);
int width = mutable.getWidth() ;
int height = mutable.getHeight() ;
mutable = Bitmap.createBitmap(mutable, 0, 0, width, height, matrix, false);

原文

I am trying to implement pinch zoom and it is working but when i zoom out and then zoom in again the resolution of the image(bitmap) decreases.
I am aware that this is just normal behavior of my code and i want to know how to do this with right way .

here is the relevant code :

Matrix matrix = new Matrix() ;
float scale = newDist / oldDist;
matrix.postScale(scale, scale, mid.x, mid.y);
int width = mutable.getWidth() ;
int height = mutable.getHeight() ;
mutable = Bitmap.createBitmap(mutable, 0, 0, width, height, matrix, false);

分享到QQ

分享到微博