HarmonyOS 地图计算复杂路线耗时导致页面卡顿

可以将计算路径相关的API放到子线程执行。

@Concurrent
async function foo(context: common.Context) {
  let params: navi.DrivingRouteParams = {
    "origins":[{"latitude":xxx,"longitude":xxx}],
    "destination":{"latitude":xxx,"longitude":xxx},
    language: 'zh_CN'
  }
  const res = await navi.getDrivingRoutes(context,params)
  return res;
}
taskpool.execute(foo,getContext()).then((ret: Object) => {
  // 结果处理
})
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