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java.lang.Objectcom.nostra13.universalimageloader.utils.ImageSizeUtils
public final class ImageSizeUtils
Provides calculations with image sizes, scales
Method Summary | |
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static int |
computeImageSampleSize(ImageSize srcSize,
ImageSize targetSize,
ViewScaleType viewScaleType,
boolean powerOf2Scale)
Computes sample size for downscaling image size (srcSize) to view size (targetSize). |
static float |
computeImageScale(ImageSize srcSize,
ImageSize targetSize,
ViewScaleType viewScaleType,
boolean stretch)
Computes scale of target size (targetSize) to source size (srcSize). |
static ImageSize |
defineTargetSizeForView(android.widget.ImageView imageView,
int maxImageWidth,
int maxImageHeight)
Defines target size for image. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static ImageSize defineTargetSizeForView(android.widget.ImageView imageView, int maxImageWidth, int maxImageHeight)
view
parameters, configuration
parameters or device display dimensions.
public static int computeImageSampleSize(ImageSize srcSize, ImageSize targetSize, ViewScaleType viewScaleType, boolean powerOf2Scale)
srcSize(100x100), targetSize(10x10), powerOf2Scale = true -> sampleSize = 8 srcSize(100x100), targetSize(10x10), powerOf2Scale = false -> sampleSize = 10 srcSize(100x100), targetSize(20x40), viewScaleType = FIT_INSIDE -> sampleSize = 5 srcSize(100x100), targetSize(20x40), viewScaleType = CROP -> sampleSize = 2
srcSize
- Original (image) sizetargetSize
- Target (view) sizeviewScaleType
- Scale type for placing image in viewpowerOf2Scale
- true - if sample size be a power of 2 (1, 2, 4, 8, ...)
public static float computeImageScale(ImageSize srcSize, ImageSize targetSize, ViewScaleType viewScaleType, boolean stretch)
srcSize(40x40), targetSize(10x10) -> scale = 0.25 srcSize(10x10), targetSize(20x20), stretch = false -> scale = 1 srcSize(10x10), targetSize(20x20), stretch = true -> scale = 2 srcSize(100x100), targetSize(20x40), viewScaleType = FIT_INSIDE -> scale = 0.2 srcSize(100x100), targetSize(20x40), viewScaleType = CROP -> scale = 0.4
srcSize
- Source (image) sizetargetSize
- Target (view) sizeviewScaleType
- Scale type for placing image in viewstretch
- Whether source size should be stretched if target size is larger than source size. If false
then result scale value can't be greater than 1.
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