Android基于Path的addRoundRect，Canvas剪切clipPath简洁的圆形图实现，Kotlin（2）

Kotlin 复制代码

import android.content.Context
import android.graphics.BitmapFactory
import android.graphics.Canvas
import android.graphics.Path
import android.util.AttributeSet
import androidx.appcompat.widget.AppCompatImageView


class MyView : AppCompatImageView {
    private var mRadius = 0f //半径
    private val mPath = Path()

    constructor(ctx: Context, attributeSet: AttributeSet) : super(ctx, attributeSet) {
        val mBmpSrc = BitmapFactory.decodeResource(resources, R.mipmap.pic, null)
        setImageBitmap(mBmpSrc)
    }

    override fun onDraw(canvas: Canvas) {
        canvas.save()

        val w = measuredWidth.toFloat()
        val h = measuredHeight.toFloat()

        val mini = Math.min(w, h)
        mRadius = mini / 2f

        val left = (w - mini) / 2f
        val top = (h - mini) / 2f
        val right = (w + mini) / 2f
        val bottom = (h + mini) / 2f

        mPath.addRoundRect(left, top, right, bottom, mRadius, mRadius, Path.Direction.CW)
        canvas.clipPath(mPath)

        super.onDraw(canvas)
        canvas.restore()
    }
}

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