DownloadManager.Request.setNotificationVisibility失败,jSecurityException:能见度无效值:2 [英] DownloadManager.Request.setNotificationVisibility fails with jSecurityException: invalid value for visibility: 2

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问题描述

我试图使用下载管理器服务类矿山的:

I'm trying to use DownloadManager in a Service class of mine:

    DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
    //imageUri is a valid Uri
    Request downloadRequest= new Request(imageUri); 
    //without this line, it works
    downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
    //subpath is valid
    downloadRequest.setDestinationInExternalFilesDir(this, null, subPath);
    downloadManager.enqueue(downloadRequest);

没有 setNotificationVisibility ,这code效果很好。但是,它会显示一个通知,说我不想,因为我用这个$ C $下延迟加载图片的的ListView

Without setNotificationVisibility, this code works well. But it displays a notification, that I don't want, because I use this code for lazy-loading images in a ListView.

据我所知,这个通知可以隐藏以

I understand, this notification can be hidden with

downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);

但在这种情况下,我的应用程序崩溃:

But in that case, my application crashes with:

2月2日至19号:24:24.055:E / AndroidRuntime(2572):   java.lang.SecurityException异常:能见度值无效:二月2日至19号   02:24:24.055:E / AndroidRuntime(2572):在   android.os.Parcel.readException(Parcel.java:1327)2月19号02:24:24.055:   E / AndroidRuntime(2572):在   android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:181)   2月2号至十九号:24:24.055:E / AndroidRuntime(2572):在   android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)   2月2号至十九号:24:24.055:E / AndroidRuntime(2572):在   android.content.ContentProviderProxy.insert(ContentProviderNative.java:415)   2月2号至十九号:24:24.055:E / AndroidRuntime(2572):在   android.content.ContentResolver.insert(ContentResolver.java:730)02-19   02:24:24.055:E / AndroidRuntime(2572):在   android.app.DownloadManager.enqueue(DownloadManager.java:885)02-19   02:24:24.055:E / AndroidRuntime(2572):在   MyService.getImage(MyService.java:112)

02-19 02:24:24.055: E/AndroidRuntime(2572): java.lang.SecurityException: Invalid value for visibility: 2 02-19 02:24:24.055: E/AndroidRuntime(2572): at android.os.Parcel.readException(Parcel.java:1327) 02-19 02:24:24.055: E/AndroidRuntime(2572): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:181) 02-19 02:24:24.055: E/AndroidRuntime(2572): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135) 02-19 02:24:24.055: E/AndroidRuntime(2572): at android.content.ContentProviderProxy.insert(ContentProviderNative.java:415) 02-19 02:24:24.055: E/AndroidRuntime(2572): at android.content.ContentResolver.insert(ContentResolver.java:730) 02-19 02:24:24.055: E/AndroidRuntime(2572): at android.app.DownloadManager.enqueue(DownloadManager.java:885) 02-19 02:24:24.055: E/AndroidRuntime(2572): at MyService.getImage(MyService.java:112)

请告诉我错 setNotificationVisibility ?哪有,我有通知?

Whats' wrong with setNotificationVisibility? How can I had the notification?

推荐答案

您需要在清单按文档以下权限:

You need the following permission in the manifest as per documentation:

<uses-permission
        android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />

这篇关于DownloadManager.Request.setNotificationVisibility失败,jSecurityException:能见度无效值:2的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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