如何使用DownloadManager将下载的文件存储到应用程序's文件目录已分配

Question

我正在尝试使用DownloadManager将下载的文件存储到android分配的app/s文件目录中。为此，我使用以下代码

downloadManager=(DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE);
Uri uri = Uri.parse(link);
DownloadManager.Request request= new DownloadManager.Request(uri);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setVisibleInDownloadsUi(false);
request.setTitle(fileName);
File file = ctx.getFilesDir();
Uri myPath=Uri.fromFile(file);
request.setDestinationUri(myPath);
Long reference= downloadManager.enqueue(request);
Toast.makeText(DownloadActivity.this,"Downloading Started",Toast.LENGTH_LONG).show();

通过使用此代码，我得到以下错误

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.puranepaper.PuranePaper, PID: 18263
java.lang.SecurityException: Unsupported path /data/data/com.puranepaper.PuranePaper/files
at android.os.Parcel.readException(Parcel.java:2005)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
at android.content.ContentProviderProxy.insert(ContentProviderNative.java:476)
at android.content.ContentResolver.insert(ContentResolver.java:1552)
at android.app.DownloadManager.enqueue(DownloadManager.java:1163)
at com.puranepaper.PuranePaper.DownloadActivity$1.onClick(DownloadActivity.java:92)
at android.view.View.performClick(View.java:6310)
at android.view.View$PerformClick.run(View.java:24970)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:171)
at android.app.ActivityThread.main(ActivityThread.java:6654)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)

我如何删除"不支持的路径"错误，以及我在这个代码中做错了什么

Answer 1

其他应用程序(包括下载管理器(无法访问应用程序的内部内存。

重复这个问题。

Answer 2

用"file://"启动myPath

request.setDestinationUri("file://"+myPath(；

这对我有效：

public void downloadFile(String address, String destination) {  
///// Baja el archivo a la carpeta indicada.
Uri uri = Uri.parse(address);
String Nombre = address.substring(address.lastIndexOf('/') + 1);
DownloadManager.Request request = new DownloadManager.Request(uri);
// request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI); // Solo WiFi.
request.setDestinationUri(Uri.parse("file://" + Environment.getExternalStorageDirectory() + destination  + "/"  + Nombre));
// Bajada.
DownloadManager downloadmanager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
downloadmanager.enqueue(request);
}

downloadFile("http://example.com/myfile.jpg"，"/mydirectory"(