[Android Studio] 解決Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent

 在Android 12 (含)以上

使用PendingIntent時，若沒有加入參數中加入PendingIntent.FLAG_IMMUTABLE ，在執行時會發生錯誤:

Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent

如果要解決這個問題，就需要在參數中加入PendingIntent.FLAG_IMMUTABLE這個falg

example:

原本為

PendingIntent pi = PendingIntent.getBroadcast(getApplicationContext(), 2, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT);

修改為

PendingIntent pi = PendingIntent.getBroadcast(getApplicationContext(), 2, intentAlarm, PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT);

這樣在Android 12執行時，錯誤就不見了~

參考 reference:

https://www.bswen.com/2022/06/how-to-solve-pendingintent-error.html