一、问题描述
Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
二、解决方法（1）
1、下载源码，并将下图位置作为适配高版本的配置
三、解决方法（2）
有老哥已经上传处理好了一版：https://github.com/ElectApp/MyMQTT?tab=readme-ov-file
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