let textObject = new wxopensdk.WXTextObject
textObject.text = "分享的内容"

let mediaMessage = new wxopensdk.WXMediaMessage()
mediaMessage.mediaObject = textObject

let req = new wxopensdk.SendMessageToWXReq()
req.scene = wxopensdk.SendMessageToWXReq.WXSceneSession
req.message = mediaMessage

this.wxApi.sendReq(getContext(this) as common.UIAbilityContext, req)

用的官方的文字分享都报错，确认了一下移动应用审核是通过的，APPId是：wx00cbb873f9202678