滑行转换不起作用

Question

我想使用滑动变换从顶部裁剪位图，我有以下代码：

public class TopCropTransformation extends BitmapTransformation {

    public TopCropTransformation(Context context) {
        super(context);
    }

    public TopCropTransformation(BitmapPool bitmapPool) {
        super(bitmapPool);
    }

    @Override
    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
        return Bitmap.createBitmap(toTransform, 0,0, outWidth, outHeight);
    }

    @Override
    public String getId() {
        return "TopCropTransformation";
    }
}

我使用这样的转换：

Glide.with(context)
.load(user.getImageUrl())
.error(R.drawable.missingprofile)
.transform(new TopCropTransformation(context))
.into(holder.image);

glide 显示错误图像。谁能帮帮我？

编辑：我刚刚发现这个异常 "x + width must be <= bitmap.width()"

Answer 1

最后使用

解决了

@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {

    float heightRatio = (float)toTransform.getHeight() / (float)toTransform.getWidth();
    int newHeight = (int) (heightRatio * outWidth);
    Bitmap scaled = Bitmap.createScaledBitmap(toTransform, outWidth, newHeight, false);
    return Bitmap.createBitmap(scaled, 0,0, outWidth, outHeight);
}

滑行转换不起作用

Glide transformation not working

android

bitmap

android-glide