HarmonyOS 鸿蒙Next this.context.stroke() 会将前面设置的颜色和线宽度重置以最新重新绘制

将两段代码用 ```javascript this.context.beginPath(); this.context.stroke(); ``` 包起来即可。

参考代码：

[@Entry](/user/Entry)
[@Component](/user/Component)
struct LineWidthExample {
  private settings: RenderingContextSettings = new RenderingContextSettings(true)
  private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
      Canvas(this.context)
        .width('100%')
        .height('100%')
        .backgroundColor('#ffff00')
        .onReady(() => {
          this.context.beginPath()
          this.context.moveTo(125, 25)
          this.context.lineTo(125, 105)
          this.context.strokeStyle = 'rgb(255,0,0)'
          this.context.lineWidth = 1
          this.context.stroke()
          this.context.beginPath()
          this.context.moveTo(10, 25)
          this.context.lineTo(10, 105)
          this.context.strokeStyle = 'rgb(0,255,0)'
          this.context.lineWidth = 5
          this.context.stroke()
        })
    }
    .width('100%')
    .height('100%')
  }
}