How to prevent application file deleted when uninstall the app in android - android

DownloadManager mgr = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
Uri downloadUri = Uri.parse(file_url);
DownloadManager.Request request = new DownloadManager.Request(downloadUri);
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE)
.setTitle("")
.setDestinationInExternalPublicDir(Environment.DIRECTORY_PICTURES + "/MyApp", tsLong.toString() + ".jpg");
The path to download file is here:
new File(Environment.DIRECTORY_PICTURES + "/MyApp")
I found that once the app is uninstall the folder is also deleted, how to preserve that ?
thanks a lot.

Related

my pdf document is not getting saved on my phone

i am trying to save a PDFDocument on my phone but i am not able too. this is my code;
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath(),"/" +nameGet1 + "-" + idGet1+".pdf");

Try using this code, and make use you have permission to save on phone
download.setOnClickListener(v -> {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(your_file_url));
request.addRequestHeader("Cookie", CookieManager.getInstance().getCookie(your_file_url));
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, your_file_name);
DownloadManager downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
});

How does the Android Downloadmanager work?

I'm trying to download a file to the files-folder of the app
/data/user/0/app-name/files/
If I enqueue the download, the app crashes and I don't know why.
Trying setDestinationUri() AND setDestinationInExternalPublicDir() both won't work.
What is the big mistake?
DownloadManager downloadmanager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
Uri uri = Uri.parse("https://testpage.com/download.php");
DownloadManager.Request request = new DownloadManager.Request(uri);
//File fileDl = new File(getApplicationContext().getFilesDir() + "/");
String dFolder = getFilesDir().toString();
request.setDestinationUri(Uri.parse("file://" + dFolder + "/"));
//request.setDestinationInExternalPublicDir(fileDl + "/", "epaper.pdf");
downloadmanager.enqueue(request);
I know some of you can see the misunderstanding, but as a Newbie I'm blind :-)
Can anybody help?
Thx,
Chris

Image downloaded from DownloadManager queuing on Android

I have this code that downloads an image but for some reason the image is in my downloads as "queued" instead of downloading.
String url = file.public_url;
getContext();
DownloadManager manager = (DownloadManager) getContext().getSystemService(Context.DOWNLOAD_SERVICE);
Uri uri = Uri.parse(url);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setTitle(file.filename);
request.setDescription(file.filename + " description.");
request.allowScanningByMediaScanner();
request.setAllowedOverRoaming(true);
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, file.filename + file.file_extension);
manager.enqueue(request);

I have successfully downloaded the images with this Async version that doesn't use DownloadManager https://stackoverflow.com/a/3028660/6136947

Download file via inbuilt download Service

I am trying to download a file from remote server in my app. I do not want to right custom code for this. I want to download the file via inbuilt downloader(which android has built in). How to do that? And is it the correct option for this:
dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
Request request = new Request(
Uri.parse("http://www.vogella.de/img/lars/LarsVogelArticle7.png"));
enqueue = dm.enqueue(request);

try this code it's really working...
DownloadManager mgr = (DownloadManager) context.getApplicationContext().getSystemService(Context.DOWNLOAD_SERVICE);
Uri downloadUri = Uri.parse("http://www.vogella.de/img/lars/LarsVogelArticle7.png");
DownloadManager.Request request = new DownloadManager.Request(downloadUri);
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI
| DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false).setTitle("Demo")
.setDescription("Something useful. No, really.")
.setDestinationInExternalPublicDir("/test_folder", "testimage");
mgr.enqueue(request);

Set custom folder Android Download Manager

I've a question about Download Manager.
I'm going to download a file from a site. When I set the default directory for download (Environment.DIRECTORY_DOWNLOAD) all works fine and my download is started. But if I try to change the directory, my app doesn't download the file. In particular, I want my file to go into a folder inside a Download, for example /storage/sdcard/Download/myFolder. How can I fix that?
File mydownload = new File (Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)+ "/myFolder");
if (!mydownload.exists()){
mydownload.mkdir();
}
String url = sUrl[0];
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
}
request.setDestinationInExternalPublicDir(mydownload.getAbsolutePath(),"Myfile.extension");
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);

check below code: its save file in "sdcard/dhaval_files/". just replace your folder name and give permission write_external_storage in android manifest file.
public void file_download(String uRl) {
File direct = new File(Environment.getExternalStorageDirectory()
+ "/dhaval_files");
if (!direct.exists()) {
direct.mkdirs();
}
DownloadManager mgr = (DownloadManager) this.getSystemService(Context.DOWNLOAD_SERVICE);
Uri downloadUri = Uri.parse(uRl);
DownloadManager.Request request = new DownloadManager.Request(
downloadUri);
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI
| DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false).setTitle("Demo")
.setDescription("Something useful. No, really.")
.setDestinationInExternalPublicDir("/dhaval_files", "test.jpg");
mgr.enqueue(request);
}

There are two options available for you to use.
1) first setDestinationInExternalPublicDir this will let you download in any of the androids standard download folder based on media type eg DIRECTORY_DOWNLOADS, DIRECTORY_MUSIC. these files will remain after uninstall.
request.setDestinationInExternalPublicDir(DIRECTORY_DOWNLOADS,
File.separator + folderName + File.separator + fileName);
The first argument should be a standard downloads directory for this to work properly and cannot be anything else.
2) second is setDestinationInExternalFilesDir this is same as the previous method with the difference that these files will be deleted after app uninstall.
request.setDestinationInExternalFilesDir(context, DIRECTORY_DOWNLOADS,
File.separator + folderName + File.separator + fileName);
here the second argument can be null or any of the android download directories.

Try Below Code:.
String storagePath = Environment.getExternalStorageDirectory()
.getPath()
+ "/Directory_name/";
//Log.d("Strorgae in view",""+storagePath);
File f = new File(storagePath);
if (!f.exists()) {
f.mkdirs();
}
//storagePath.mkdirs();
String pathname = f.toString();
if (!f.exists()) {
f.mkdirs();
}
// Log.d("Storage ",""+pathname);
dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
Uri uri = Uri.parse(image);
checkImage(uri.getLastPathSegment());
if (!downloaded) {
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir("/Directory_name", uri.getLastPathSegment());
Long referese = dm.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading...", Toast.LENGTH_SHORT).show();
}

For Set Your Path For Download File Use: Work For me (Android 11).
File file = new File(Environment.getExternalStorageDirectory().getPath() + "/YOUR FOLDER/", "YOUR FILE.(mp3|mp4|pdf|...)");
request.setDestinationUri(Uri.fromFile(file));
Complete Code:
First Check Directory
private boolean CreateDirectory() {
boolean ret = false;
File filepath = Environment.getExternalStorageDirectory();
File dir = new File(filepath.getPath() + "/YOUR FOLDER/");
if (!dir.exists()) {
try {
dir.mkdirs();
ret = true;
} catch (Exception e) {
ret = false;
e.printStackTrace();
}
}
return ret;
}
Then:
String URL = " YOUR URL ";
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(URL));
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
request.setTitle("YOUR TITLE");
request.setDescription("YOUR DESCRIPTION");
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
File file = new File(Environment.getExternalStorageDirectory().getPath() + "/YOUR FOLDER/", "YOUR FILE.(mp3|mp4|pdf|...)");
request.setDestinationUri(Uri.fromFile(file));
DownloadManager manager= (DownloadManager)
getSystemService(Context.DOWNLOAD_SERVICE);
Long downloadId= manager.enqueue(request);
ok,Finish

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