问题
官网demo
https://developer.harmonyos.com/cn/docs/documentation/doc-gui...
失常注册，失常调用，然而就是无奈调用call办法,运行后果如下:
代码
解决
增加ohos.permission.KEEP_BACKGROUND_RUNNING权限
在module.json5文件里增加如下代码:
"requestPermissions": [ { "name": "ohos.permission.KEEP_BACKGROUND_RUNNING", "reason": "$string:app_name", "usedScene": { "abilities": [ "EntryAbility" ], "when": "inuse" }, } ],如下图所示:
运行后果: