Android Matrix画布Canvas缩放scale，Kotlin

Android Matrix画布Canvas缩放scale，Kotlin

        val originBmp = BitmapFactory.decodeResource(resources, R.mipmap.pic).copy(Bitmap.Config.ARGB_8888, true)

        val newBmp = Bitmap.createBitmap(originBmp.width, originBmp.height, Bitmap.Config.ARGB_8888)
        val canvas = Canvas(newBmp)

        val matrix = Matrix()
        canvas.concat(matrix)
        matrix.setScale(2f, 2f) //宽高放大2倍。

        //把原图绘制在画布Canvas上
        canvas.drawBitmap(originBmp, matrix, null)

        val paint = Paint(Paint.ANTI_ALIAS_FLAG)
        paint.color = Color.RED
        paint.textSize = 30f
        paint.style = Paint.Style.FILL
        paint.textAlign = Paint.Align.LEFT
        val x = 20f
        val y = 100f
        canvas.drawText("fly", x, y, paint)

        iv1?.setImageBitmap(newBmp)

https://zhangphil.blog.csdn.net/article/details/134832517https://zhangphil.blog.csdn.net/article/details/134832517

Android画布Canvas绘图scale & translate，Kotlin-CSDN博客文章浏览阅读444次，点赞4次，收藏11次。文章浏览阅读9.6k次。文章浏览阅读1.8k次。/*Java代码 将Drawable转化为Bitmap */ Bitmap drawableToBitmap(Drawable drawable) { int width = drawable.getIntrinsicWidth();Android Material Design ：LinearLayoutCompat添加分割线divider_linearlayout 分割线-CSDN博客。https://blog.csdn.net/zhangphil/article/details/134930229