I'm using Download Manger to download some multimedia files and categorize them. I'm also using Crashlytics and this is an error I frequently get on different devices and versions of Android:
java.lang.IllegalArgumentException: Unknown URL content://downloads/my_downloads at android.content.ContentResolver.insert(ContentResolver.java:862) at android.app.DownloadManager.enqueue(DownloadManager.java:1252) at com.myapp.LessonFragment$DownloadClickListener.onClick(SourceFile:570) at android.view.View.performClick(View.java:4262) at android.view.View$PerformClick.run(View.java:17351) at android.os.Handler.handleCallback(Handler.java:615) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4921) at java.lang.reflect.Method.invokeNative(Method.java) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) at dalvik.system.NativeStart.main(NativeStart.java) private class DownloadClickListener implements View.OnClickListener < @Override public void onClick(View view) < // Check if download manager available before request if (!DownloadHelper.isDownloadManagerAvailable(getActivity())) < // Build custom alert dialog AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setMessage(R.string.download_manager_disabled); builder.setCancelable(false); builder.setPositiveButton(R.string.ok, (dialog, which) ->< dialog.dismiss(); >); // Create and display alert dialog AlertDialog dialog = builder.create(); dialog.show(); return; > // Display short toast on download clicked Toast.makeText(getActivity(), R.string.lesson_download_start, Toast.LENGTH_SHORT).show(); // Get attach from view tag Attache attache = (Attache) view.getTag(); // Get lesson using lesson id Lesson lesson = new Select().from(Lesson.class) .where(Condition.column("id").is(attache.getLessonId())) .querySingle(); // Set file name from url and attache name Uri uri = Uri.parse(attache.getFile()); String fileName = attache.getName() + '.' + MimeTypeMap.getFileExtensionFromUrl(attache.getFile()); // Check if path directory not exist and create it String filePath = Environment.getExternalStorageDirectory() + "/myapp/" + lesson.getTitle() + "/"; File path = new File(filePath); if (!path.exists() || !path.isDirectory()) < if (!path.mkdirs()) < Timber.e("Could not create path directory."); >> // Check if file exist and then delete it File file = new File(filePath, fileName); if (file.exists() && file.isFile()) < if (file.delete()) < Timber.v("%s just deleted.", fileName); >> // Create download manager request using url DownloadManager.Request request = new DownloadManager.Request(uri); request.setTitle(attache.getName()); request.setDestinationInExternalPublicDir("/myapp/" + lesson.getTitle(), fileName); // Using DownloadManager for download attache file DownloadManager manager = (DownloadManager) getActivity().getSystemService(Context.DOWNLOAD_SERVICE); manager.enqueue(request); > >