Glide无法使用任何Transform/Gilde使用Transform不生效问题说明以及Gilde加载任意角圆角实现

可能是由于下面的情况导致

 

1.官方不允许同时使用两个Transform，例如

apply(RequestOptions.circleCropTransform()).apply(RequestOptions.centerCropTransform())

只会生效一个

 

2.ImageView设置了scaleType ，如果是图片本身需要裁剪的话，所有的变换后的效果可能就被裁剪掉了

 

附上一个既能裁剪 又能 设置圆角的Transform（kotlin）

原理是先使用官方的centerCrop得到转换后的图片在进行圆角裁减

package com.free..shoora.main.widget

import android.graphics.*
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
import com.bumptech.glide.load.resource.bitmap.CenterCrop
class GlideRoundedCornersTransform(private val mRadius: Float, private val mCornerType: CornerType) :
    CenterCrop() {
    enum class CornerType {
        ALL, TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT, TOP, BOTTOM, LEFT, RIGHT, TOP_LEFT_BOTTOM_RIGHT, TOP_RIGHT_BOTTOM_LEFT, TOP_LEFT_TOP_RIGHT_BOTTOM_RIGHT, TOP_RIGHT_BOTTOM_RIGHT_BOTTOM_LEFT, DEFAULT
    }

    override fun transform(
        pool: BitmapPool,
        toTransform: Bitmap,
        outWidth: Int,
        outHeight: Int
    ): Bitmap {
        return roundCrop(pool, super.transform(pool, toTransform, outWidth, outHeight))!!
    }

    private fun roundCrop(pool: BitmapPool, source: Bitmap?): Bitmap? {
        if (source == null) {
            return null
        }
        val width = source.width
        val height = source.height
        var result: Bitmap? =
            pool[source.width, source.height, Bitmap.Config.ARGB_8888]
        if (result == null) {
            result =
                Bitmap.createBitmap(source.width, source.height, Bitmap.Config.ARGB_8888)
        }
        val canvas = Canvas(result!!)
        val paint = Paint()
        paint.shader = BitmapShader(
            source,
            Shader.TileMode.CLAMP,
            Shader.TileMode.CLAMP
        )
        paint.isAntiAlias = true
        val path = Path()
        drawRoundRect(canvas, paint, path, width, height)
        return result
    }

    private fun drawRoundRect(
        canvas: Canvas,
        paint: Paint,
        path: Path,
        width: Int,
        height: Int
    ) {
        val rids: FloatArray
        when (mCornerType) {
            CornerType.ALL -> {
                rids = floatArrayOf(
                    mRadius,
                    mRadius,
                    mRadius,
                    mRadius,
                    mRadius,
                    mRadius,
                    mRadius,
                    mRadius
                )
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP_LEFT -> {
                rids = floatArrayOf(mRadius, mRadius, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP_RIGHT -> {
                rids = floatArrayOf(0.0f, 0.0f, mRadius, mRadius, 0.0f, 0.0f, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.BOTTOM_RIGHT -> {
                rids = floatArrayOf(0.0f, 0.0f, 0.0f, 0.0f, mRadius, mRadius, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.BOTTOM_LEFT -> {
                rids = floatArrayOf(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, mRadius, mRadius)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP -> {
                rids = floatArrayOf(mRadius, mRadius, mRadius, mRadius, 0.0f, 0.0f, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.BOTTOM -> {
                rids = floatArrayOf(0.0f, 0.0f, 0.0f, 0.0f, mRadius, mRadius, mRadius, mRadius)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.LEFT -> {
                rids = floatArrayOf(mRadius, mRadius, 0.0f, 0.0f, 0.0f, 0.0f, mRadius, mRadius)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.RIGHT -> {
                rids = floatArrayOf(0.0f, 0.0f, mRadius, mRadius, mRadius, mRadius, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP_LEFT_BOTTOM_RIGHT -> {
                rids = floatArrayOf(mRadius, mRadius, 0.0f, 0.0f, mRadius, mRadius, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP_RIGHT_BOTTOM_LEFT -> {
                rids = floatArrayOf(0.0f, 0.0f, mRadius, mRadius, 0.0f, 0.0f, mRadius, mRadius)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP_LEFT_TOP_RIGHT_BOTTOM_RIGHT -> {
                rids =
                    floatArrayOf(mRadius, mRadius, mRadius, mRadius, mRadius, mRadius, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.TOP_RIGHT_BOTTOM_RIGHT_BOTTOM_LEFT -> {
                rids =
                    floatArrayOf(0.0f, 0.0f, mRadius, mRadius, mRadius, mRadius, mRadius, mRadius)
                drawPath(rids, canvas, paint, path, width, height)
            }
            CornerType.DEFAULT -> {
                rids = floatArrayOf(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f)
                drawPath(rids, canvas, paint, path, width, height)
            }
        }
    }
    
    private fun drawPath(
        rids: FloatArray,
        canvas: Canvas,
        paint: Paint,
        path: Path,
        width: Int,
        height: Int
    ) {
        path.addRoundRect(RectF(0f, 0f, width.toFloat(), height.toFloat()), rids, Path.Direction.CW)
        canvas.drawPath(path, paint)
    }
}