Android 位图裁剪中心 [英] Android Crop Center of Bitmap

问题描述

我有正方形或矩形的位图.我采取最短的一边做这样的事情:

I have bitmaps which are squares or rectangles. I take the shortest side and do something like this:

int value = 0;
if (bitmap.getHeight() <= bitmap.getWidth()) {
    value = bitmap.getHeight();
} else {
    value = bitmap.getWidth();
}

Bitmap finalBitmap = null;
finalBitmap = Bitmap.createBitmap(bitmap, 0, 0, value, value);

然后我使用这个将其缩放为 144 x 144 位图:

Then I scale it to a 144 x 144 Bitmap using this:

Bitmap lastBitmap = null;
lastBitmap = Bitmap.createScaledBitmap(finalBitmap, 144, 144, true);

问题是它裁剪了原始位图的左上角，有人有裁剪位图中心的代码吗?

Problem is that it crops the top left corner of the original bitmap, Anyone has the code to crop the center of the bitmap?

推荐答案

这可以通过以下方式实现:Bitmap.createBitmap(source, x, y, width, height)

This can be achieved with: Bitmap.createBitmap(source, x, y, width, height)

if (srcBmp.getWidth() >= srcBmp.getHeight()){

  dstBmp = Bitmap.createBitmap(
     srcBmp, 
     srcBmp.getWidth()/2 - srcBmp.getHeight()/2,
     0,
     srcBmp.getHeight(), 
     srcBmp.getHeight()
     );

}else{

  dstBmp = Bitmap.createBitmap(
     srcBmp,
     0, 
     srcBmp.getHeight()/2 - srcBmp.getWidth()/2,
     srcBmp.getWidth(),
     srcBmp.getWidth() 
     );
}

这篇关于Android 位图裁剪中心的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！