1
我试图使用Android DownloadManager类这种方式： super.onCreate（savedInstanceState）; setContentView（R.layout.main）;Android DownloadManager error
Request r = new Request(Uri.parse("http://url"));
r.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "file.ext"); // also tried all other possible ways to set up destination
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(r);
在最后一行，dm.enqueue(r)应用程序崩溃。 Logcat错误：
05-12 13:53:55.408: E/JavaBinder(6814): *** Uncaught remote exception! (Exceptions are not yet supported across processes.)
05-12 13:53:55.408: E/JavaBinder(6814): java.lang.NoSuchMethodError: getExternalStorages
05-12 13:53:55.408: E/JavaBinder(6814): at com.android.providers.downloads.Helpers.isFilenameValid(Helpers.java:652)
05-12 13:53:55.408: E/JavaBinder(6814): at com.android.providers.downloads.DownloadProvider.checkFileUriDestination(DownloadProvider.java:613)
05-12 13:53:55.408: E/JavaBinder(6814): at com.android.providers.downloads.DownloadProvider.insert(DownloadProvider.java:500)
05-12 13:53:55.408: E/JavaBinder(6814): at android.content.ContentProvider$Transport.insert(ContentProvider.java:198)
05-12 13:53:55.408: E/JavaBinder(6814): at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:146)
05-12 13:53:55.408: E/JavaBinder(6814): at android.os.Binder.execTransact(Binder.java:324)
05-12 13:53:55.408: E/JavaBinder(6814): at dalvik.system.NativeStart.run(Native Method)
05-12 13:53:55.408: W/dalvikvm(6814): threadid=7: thread exiting with uncaught exception (group=0x2aac8620)
05-12 13:53:55.408: E/AndroidRuntime(6814): FATAL EXCEPTION: Binder Thread #1
05-12 13:53:55.408: E/AndroidRuntime(6814): java.lang.NoSuchMethodError: getExternalStorages
05-12 13:53:55.408: E/AndroidRuntime(6814): at com.android.providers.downloads.Helpers.isFilenameValid(Helpers.java:652)
05-12 13:53:55.408: E/AndroidRuntime(6814): at com.android.providers.downloads.DownloadProvider.checkFileUriDestination(DownloadProvider.java:613)
05-12 13:53:55.408: E/AndroidRuntime(6814): at com.android.providers.downloads.DownloadProvider.insert(DownloadProvider.java:500)
05-12 13:53:55.408: E/AndroidRuntime(6814): at android.content.ContentProvider$Transport.insert(ContentProvider.java:198)
05-12 13:53:55.408: E/AndroidRuntime(6814): at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:146)
05-12 13:53:55.408: E/AndroidRuntime(6814): at android.os.Binder.execTransact(Binder.java:324)
05-12 13:53:55.408: E/AndroidRuntime(6814): at dalvik.system.NativeStart.run(Native Method)
但是，如果我没有以任何方式指定目的地，则会成功下载文件。
我不明白什么是问题。请问你能帮帮我吗？
你在做什么？在当前的源代码中，'isFilenameValid（）'不涉及'getExternalStorages（）'方法。 – CommonsWare
我在Xperia Neo mobile上运行这个。 – aplavin
Xperia Neo是运行原始ROM还是一些改装的ROM？ – CommonsWare