在我的项目中，这条线是可行的

PendingIntent = PendingIntent。getActivity(this,0, notificationIntent, PendingIntent。| PendingIntent.FLAG_IMMUTABLE;

你可以像这样更新挂起的意图:

val updatedPendingIntent = PendingIntent.getActivity(
   context,
   NOTIFICATION_REQUEST_CODE,
   updatedIntent,
   PendingIntent.FLAG_IMMUTABLE| PendingIntent.FLAG_UPDATE_CURRENT 
)

你可以添加PendingIntent。FLAG_IMMUTABLE加上|符号，它就可以工作了。

我将我的work-runtime-ktx版本更新到2.7.1

在上面的修改之后，我又遇到了另一个错误

java.lang.IllegalStateException: SimpleTypeImpl should not be created for error type: ErrorScope{Error scope for class <ERROR CLASS> with arguments: org.jetbrains.kotlin.types.IndexedParametersSubstitution@14ac19e7}

看看我是如何通过更新kotlin-gradle-plugin版本来解决上述错误的。

当你升级你的项目和目标android版本12时，这个问题就来了。使用该解决方案，您可以更新所有待处理实习生

目标S+(版本31及以上)需要在创建PendingIntent时指定FLAG_IMMUTABLE或FLAG_MUTABLE之一

以下代码

 PendingIntent pendingIntent = null;
        if (Build.VERSION.SDK_INT>= Build.VERSION_CODES.S){
             pendingIntent = stackBuilder.getPendingIntent(1, PendingIntent.FLAG_MUTABLE);

        }else {
             pendingIntent = stackBuilder.getPendingIntent(1, PendingIntent.FLAG_UPDATE_CURRENT);

        }

如果你在项目中使用接收器，也要实现这个依赖工作

//Work Manager dependency
implementation 'androidx.work:work-runtime:2.7.1'

我想分享一下我的病例。我把标志改为FLAG_IMMUTABLE，但只有当应用程序在后台时才会出现错误。我从这里解决了:https://github.com/firebase/firebase-android-sdk/issues/3115

根本原因是因为我以不赞成的方式检索FCM令牌:

FirebaseInstanceId.getInstance().getInstanceId().addOnSuccessListener(activity,  new OnSuccessListener<InstanceIdResult>() {
        @Override
        public void onSuccess(InstanceIdResult instanceIdResult) {
            String newToken = instanceIdResult.getToken();
       
        }
    });

然后更新依赖项:

FirebaseMessaging.getInstance().getToken().addOnCompleteListener(task -> {
            String newToken = task.getResult();
        });

我创建了PendingIntentCompat。将PendingIntent逻辑抽象到一个单独的类中。

object PendingIntentCompat {

    @JvmStatic
    @JvmOverloads
    fun getActivity(
        context: Context,
        requestCode: Int,
        intent: Intent,
        flags: Int,
        isMutable: Boolean = false
    ): PendingIntent {
        return PendingIntent.getActivity(
            context,
            requestCode,
            intent,
            addMutabilityFlags(isMutable, flags)
        )
    }

    @JvmStatic
    @JvmOverloads
    fun getService(
        context: Context,
        requestCode: Int,
        intent: Intent,
        flags: Int,
        isMutable: Boolean = false
    ): PendingIntent {
        return PendingIntent.getService(
            context,
            requestCode,
            intent,
            addMutabilityFlags(isMutable, flags)
        )
    }

    @JvmStatic
    @JvmOverloads
    @RequiresApi(Build.VERSION_CODES.O)
    fun getForegroundService(
        context: Context,
        requestCode: Int,
        intent: Intent,
        flags: Int,
        isMutable: Boolean = false
    ): PendingIntent {
        return PendingIntent.getForegroundService(
            context,
            requestCode,
            intent,
            addMutabilityFlags(isMutable, flags)
        )
    }

    /**
     * https://developer.android.com/about/versions/12/behavior-changes-12#pending-intent-mutability
     */
    private fun addMutabilityFlags(isMutable: Boolean, flags: Int): Int {
        var updatedFlags = flags

        if (isMutable) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
                updatedFlags = flags or PendingIntent.FLAG_MUTABLE
            }
        } else {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                updatedFlags = flags or PendingIntent.FLAG_IMMUTABLE
            }
        }
        return updatedFlags
    }
}