1.设置paint抗锯齿
val bgPaint = Paint().apply {
isAntiAlias = true //抗锯齿
isDither = true //防抖动
isFilterBitmap = true //bitmap抗锯齿
}
2.设置canvas抗锯齿
在
override fun onDraw(canvas: Canvas) {}
或者
override fun dispatchDraw(canvas: Canvas) {}
中调用 canvas.drawFilter = paintFlagsDrawFilter
val paintFlagsDrawFilter = PaintFlagsDrawFilter(
0,
Paint.ANTI_ALIAS_FLAG or Paint.FILTER_BITMAP_FLAG
)
canvas.drawFilter = paintFlagsDrawFilter
3.关闭硬件加速
在View中调用
setLayerType(View.LAYER_TYPE_SOFTWARE, null) //关闭硬件加速
附上开启的代码 myView.setLayerType(View.LAYER_TYPE_HARDWARE, null); //开启硬件加速
