如何使用滑行库旋转图像? (就像毕加索一样)

问题描述

我正在尝试使用滑行库旋转图像.以前，我可以使用毕加索(由于问题，我转而滑行).现在我在滑行中缺少旋转功能.我尝试使用转换，但没有用.

I am trying to rotate the image using glide library. Previously, was able to do with Picasso (due to an issue, I moved to glide). Now I am missing rotate functionality in glide. I tried using transformations but didn't work.

//使用的代码

public class MyTransformation extends BitmapTransformation {

private float rotate = 0f;

public MyTransformation(Context context, float rotate) {
    super(context);
    this.rotate = rotate;
}

@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform,
                           int outWidth, int outHeight) {
    return rotateBitmap(toTransform, rotate);
}

@Override
public String getId() {
    return "com.example.helpers.MyTransformation";
}

public static Bitmap rotateBitmap(Bitmap source, float angle)
{
    Matrix matrix = new Matrix();
    matrix.postRotate(angle);
    return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}
}

//滑行

Glide.with(context)
                .load(link)
                .asBitmap()
                .transform(new MyTransformation(context, 90))
                .into(imageView);

谢谢.

推荐答案

也许您已经找到了自己的解决方案，如果没有，也许对您有帮助.我使用此代码片段来旋转从相机获取的图像.

Maybe you found a solution already by yourself, if not, maybe this could help you. I use this snippet for rotate images which I get from the camera.

public MyTransformation(Context context, int orientation) {
    super(context);
    mOrientation = orientation;
}

@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
    int exifOrientationDegrees = getExifOrientationDegrees(mOrientation);
    return TransformationUtils.rotateImageExif(toTransform, pool, exifOrientationDegrees);
}

private int getExifOrientationDegrees(int orientation) {
    int exifInt;
    switch (orientation) {
        case 90:
            exifInt = ExifInterface.ORIENTATION_ROTATE_90;
            break;
        // other cases
        default:
            exifInt = ExifInterface.ORIENTATION_NORMAL;
            break;
    }
    return exifInt;
}

以及如何使用它:

   Glide.with(mContext)
            .load(//your url)
            .asBitmap()
            .centerCrop()
            .transform(new MyTransformation(mContext, 90))
            .diskCacheStrategy(DiskCacheStrategy.RESULT)
            .into(//your view);

有关更多情况或exif int值，请检查android.media.ExifInterface中的公共常量

for more cases or exif int values, check the public constants in android.media.ExifInterface

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