代码片段： https://developers.weixin.qq.com/s/MrqfgAmj7mDa

渐变文字在模拟器和ios上显示正常，但在安卓上面却不显示

const app = getApp()


Page({
  data: {},


  onLoad: function () {
    // 通过 SelectorQuery 获取 Canvas 节点
    wx.createSelectorQuery()
      .select('#canvas')
      .fields({
        node: true,
        size: true,
      })
      .exec(this.init.bind(this))
  },


  init(res) {
    const width = res[0].width
    const height = res[0].height


    const canvas = res[0].node
    const ctx = canvas.getContext('2d')


    const dpr = wx.getSystemInfoSync().pixelRatio
    canvas.width = width * dpr
    canvas.height = height * dpr
    ctx.scale(dpr, dpr)


    const gradient = ctx.createLinearGradient(width * 0.66, height * 0.55, width * 0.7, height * 0.55)
    gradient.addColorStop('0', 'rgba(213,92,119,1)')
    gradient.addColorStop('1', 'rgba(255,173,97,1)')
    ctx.fillStyle = gradient
    ctx.fillText('这是一行文字', width * 0.64, height * 0.55)




    const img = canvas.createImage()
    img.onload = () => {
      this._img = img
    }
    img.src = './car.png'
  }})