如果你让你的应用在android 12上运行，有一个新的PendingIntent可变标志。如果你不希望你的PendingIntent被静音，使用

Java

PendingIntent updatedPendingIntent = PendingIntent.getActivity(
   applicationContext,
   NOTIFICATION_REQUEST_CODE,
   updatedIntent,
   PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT // setting the mutability flag 
)

科特林

val updatedPendingIntent = PendingIntent.getActivity(
   applicationContext,
   NOTIFICATION_REQUEST_CODE,
   updatedIntent,
   PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT // setting the mutability flag 
)

如果你想要你的PendingIntent静音使用以下方法:

Java

PendingIntent updatedPendingIntent = PendingIntent.getActivity(
   applicationContext,
   NOTIFICATION_REQUEST_CODE,
   updatedIntent,
   PendingIntent.FLAG_MUTABLE | PendingIntent.FLAG_UPDATE_CURRENT // setting the mutability flag 
)

科特林

val updatedPendingIntent = PendingIntent.getActivity(
   applicationContext,
   NOTIFICATION_REQUEST_CODE,
   updatedIntent,
   PendingIntent.FLAG_MUTABLE or PendingIntent.FLAG_UPDATE_CURRENT // setting the mutability flag 
)

最后实现这个依赖

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

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
    }
}

在我的例子中，它也是由使用旧WorkManager版本的第三方库强制所有依赖的新Android Work版本在你的根构建中使用这个。gradle文件:

allproject {
  project.configurations.all {
    resolutionStrategy {
      force 'androidx.work:work-runtime:2.7.0'
    }
  }
}

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'

如果您没有使用最新版本的WorkManager，就会看到这个问题。在2.7.0-alpha02版本中已修复:

使PendingIntent可变显式，以修复针对Android 12时的崩溃

请记住，2.7.0-alpha02只与Android 12开发者预览1 SDK兼容。所以你可能想要等到它进入beta版或RC版。

2021年4月21日更新-为任何谷歌搜索该问题的人添加这个答案，您可能遇到的错误可能是这样的:

java.lang.IllegalArgumentException: com.myapp.myapp: Targeting S+ (version 10000 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.
        at android.app.PendingIntent.checkFlags(PendingIntent.java:386)
        at android.app.PendingIntent.getBroadcastAsUser(PendingIntent.java:657)
        at android.app.PendingIntent.getBroadcast(PendingIntent.java:644)
        at androidx.work.impl.utils.ForceStopRunnable.getPendingIntent(ForceStopRunnable.java:174)
        at androidx.work.impl.utils.ForceStopRunnable.isForceStopped(ForceStopRunnable.java:108)
        at androidx.work.impl.utils.ForceStopRunnable.run(ForceStopRunnable.java:86)
        at androidx.work.impl.utils.SerialExecutor$Task.run(SerialExecutor.java:75)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:920)

你不需要在你的应用中直接使用WorkManager来查看这个崩溃。

如本文所述，解决方案是向构建中添加依赖项。Android 12版本的gradle文件:

 implementation 'androidx.work:work-runtime-ktx:2.7.0-alpha05'

注意，无论你使用的是Java、Kotlin +协程、RxJava2、GCMNetworkManager等等，这种依赖关系都是不同的。所以一定要检查上面的还原。

显然，用最新的版本号替换上面的版本号。如前所述，它不兼容android-13之前的版本。

实现androidx.work:work-runtime:2.7.1