我正在使用Download Manger下载一些多媒体文件并对其进行分类.我也在使用Crashlytics,这是一个错误,我经常在不同的设备和Android版本上得到它.我正在寻找你的解决方案/建议！
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)
您可以在下面看到我的代码：
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);
}
}
)
)
)
