轉：android DownloadManager: java.lang.SecurityException: Invalid value for visibility: 2

一、問題描述

今天使用Android系統的DownloadManager進行下載操做時，爆了以下所示的錯誤：

java.lang.RuntimeException: Unable to start service com.xtc.fm.qingting.services.QingtingFmDownloadService2@1b97b060 with Intent { act=com.xtc.fm.qingting.FM_DOWNLOAD_SERVICE_START pkg=com.xtc.fm.qingting cmp=com.xtc.fm.qingting/.services.QingtingFmDownloadService2 (has extras) }: java.lang.SecurityException: Invalid value for visibility: 2
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2911)
    at android.app.ActivityThread.access$2100(ActivityThread.java:151)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5254)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)
Caused by: java.lang.SecurityException: Invalid value for visibility: 2
    at android.os.Parcel.readException(Parcel.java:1592)
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:190)
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:142)
    at android.content.ContentProviderProxy.insert(ContentProviderNative.java:476)
    at android.content.ContentResolver.insert(ContentResolver.java:1207)
    at android.app.DownloadManager.enqueue(DownloadManager.java:946)
    at com.xtc.fm.qingting.services.QingtingFmDownloadService2.initDownManager(QingtingFmDownloadService2.java:195)
    at com.xtc.fm.qingting.services.QingtingFmDownloadService2.onStartCommand(QingtingFmDownloadService2.java:120)
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
    ... 9 more
java.lang.SecurityException: Invalid value for visibility: 2
    at android.os.Parcel.readException(Parcel.java:1592)
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:190)
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:142)
    at android.content.ContentProviderProxy.insert(ContentProviderNative.java:476)
    at android.content.ContentResolver.insert(ContentResolver.java:1207)
    at android.app.DownloadManager.enqueue(DownloadManager.java:946)
    at com.xtc.fm.qingting.services.QingtingFmDownloadService2.initDownManager(QingtingFmDownloadService2.java:195)
    at com.xtc.fm.qingting.services.QingtingFmDownloadService2.onStartCommand(QingtingFmDownloadService2.java:120)
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
    at android.app.ActivityThread.access$2100(ActivityThread.java:151)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5254)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)

其中相關的部分代碼以下：

 //設置下載地址
        DownloadManager.Request downRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
        // 設置容許使用的網絡類型 (| DownloadManager.Request.NETWORK_MOBILE)
        downRequest.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);
        // 下載時，不顯示通知欄
        downRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
        // 顯示下載界面
        downRequest.setVisibleInDownloadsUi(true);
        // 保存的文件名
        String fileName = downloadInfo.getProgramTitle() + ".m4a";
        // 設置下載路徑和文件名
        downRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_MUSIC, fileName);
        //設置文件類型
        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
        String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(downloadUrl));
        downRequest.setMimeType(mimeString);
        // 設置爲可被媒體掃描器找到
        downRequest.allowScanningByMediaScanner();
        // 將下載請求放入隊列
        final long downloadId = manager.enqueue(downRequest);

二、解決方法

原來其中的一段代碼是須要相應的權限 android.permission.DOWNLOAD_WITHOUT_NOTIFICATION

  // 下載時，不顯示通知欄
  downRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);

所以在AndroidManifest.xml文件中加入上面所須要的權限便可。

<!--DownloadManager下載時不顯示Notification-->
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />

本文轉自：https://blog.csdn.net/ouyang_peng/article/details/52047149