[2500]裁剪图片被旋转
使用的库为 (https://github.com/jdamcd/android-crop)
选择它，因为其
> based on code from AOSP
但是小米 6 测试出现了裁剪图片不正常的 bug，表现为图片长宽正常，但相比原图发生了旋转而不能正常显示。
后来发现同一张照片就是会出现问题。
首先想到是不是有 bug，于是查看 (https://github.com/jdamcd/android-crop/issues)
果然有不少人提出了相同的问题，想在 issues 中找找有没有解决方法。
后来着重在 (https://github.com/jdamcd/android-crop/pulls) 中查看。
确实有不少的请求，也有一些给出了解方案，整理如下：
# 解决方案
添加旋转，去除 copyExifRotation ，去除预览。
以下是一些请求
(https://github.com/jdamcd/android-crop/pull/251)
使用了 Support Library ，测试成功，但是不想引入库。
同时提供了注释
>For the same reason (to be protocol independent), the EXIF information is not copied
to the output anymore. Instead, the cropped image is rotated using Matrix.postRotate
(as a result of this, it is not necessary to rewrite the output just to copy the EXIF
rotation as done before).
(https://github.com/jdamcd/android-crop/pull/190)
知道了不需要展示，可以注掉，上面 251 的解决方案，会在裁剪后先展示旋转的图，再返回，不展示以后更好了。
```
if (croppedImage != null) {
//imageView.setImageRotateBitmapResetBase(new RotateBitmap(croppedImage, exifRotation), true);
//imageView.center();
imageView.highlightViews.clear();
}
```
后面的处理也是正确的处理，除了包含 copyExifRotation
```
//if the cutting box are rectangle( outWidth != outHeight ),and the exifRotation is 90 or 270,
//the outWidth and outHeight should be interchanged
if (exifRotation==90 || exifRotation==270) {
int temp=outWidth;
outWidth=outHeight;
outHeight=temp;
}
...
croppedImage = decoder.decodeRegion(rect, new BitmapFactory.Options());
Matrix matrix = new Matrix();
if (rect.width() > outWidth || rect.height() > outHeight) {
matrix.postScale((float) outWidth / rect.width(), (float) outHeight / rect.height());
}
//If the picture's exifRotation !=0 ,they should be rotated to 0 degrees
//If the picture need not to be scale, they also need to be rotate to 0 degrees
matrix.postRotate(exifRotation);
croppedImage = Bitmap.createBitmap(croppedImage, 0, 0, croppedImage.getWidth(), croppedImage.getHeight(), matrix, true);
```
(https://github.com/jdamcd/android-crop/pull/146)
有图，有注释，很棒，但是仍然有 copyExifRotation
可以看到 190 的参考了这个 146 的。
```
croppedImage = decoder.decodeRegion(rect, new BitmapFactory.Options());
if (rect.width() > outWidth || rect.height() > outHeight) {
Matrix matrix = new Matrix();
matrix.postScale((float) outWidth / rect.width(), (float) outHeight / rect.height());
//if the picture's exifRotation !=0 ,they should be rotate to 0 degrees
matrix.postRotate(exifRotation);
croppedImage = Bitmap.createBitmap(croppedImage, 0, 0, croppedImage.getWidth(), croppedImage.getHeight(), matrix, true);
}else{
//if the picture need not to be scale, they also neet to be rotate to 0 degrees
Matrix matrix = new Matrix();
matrix.postRotate(exifRotation);
croppedImage = Bitmap.createBitmap(croppedImage, 0, 0, croppedImage.getWidth(), croppedImage.getHeight(), matrix, true);
}
```
(https://github.com/jdamcd/android-crop/pull/116)
简单粗暴，注释了 copyExifRotation ，加上了 matrix.setRotate(exifRotation);
但是应该加到外面才对，而且没有处理交换宽高。
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