Develop Reference

Download Manager Android: Download Complete

I have this application wherein a feature of it will allow you to download a video. The download part is working, but I need to do another function right after the download has been completed. Currently, I am using AsyncTask, but whenever I try to toast on the PostExecute, nothing happens. I'd like to call another function to encrypt then delete the original file after the download has been completed.
And btw, the encryption part is working as well. The only thing I need is something that will allow me to know if the download has been completed.
This is the code where in I'll be downloading the file from a URL. But, I need to know if the download is complete to execute the AsyncTask
public void downloadTutorial() throws Exception {
myURL = "";
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(myURL));
request.setTitle(injuryType + " Video");
request.setDescription("File is being downloaded...");
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
String fileName = URLUtil.guessFileName(myURL, null, MimeTypeMap.getFileExtensionFromUrl(myURL));
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
DownloadManager manager = (DownloadManager) getActivity().getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);
//if the download is complete execute this
//new JSONTask().execute();
}
The code of the AsyncTask is:
public class JSONTask extends AsyncTask<Void, Void, Void>{
#Override
protected Void doInBackground(Void... params) {
try {
Encrypter.encrypt(injuryType);
} catch (IOException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
Toast.makeText(getActivity(), "Download Done", Toast.LENGTH_SHORT).show();
}
}

So you want to access the file after downloading the file using Download Manager.
First you will need a Broadcast receiver which will inform you after downloading a file.
In Manifest :
<receiver
android:name="<your download receiver class extends Broadcast receiver>"
android:enabled="true"
android:protectionLevel= "signature"
>
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
</intent-filter>
</receiver>
Now you will need to save the download reference id in sharedpref or database
Now save this download reference id in your sharedpref or database so that we can get it in broadcast receiver.
Uri uri = Uri.parse(content.url);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setDescription("Your App Title").setTitle(<file title>);
request.setDestinationInExternalFilesDir(getActivity(), Environment.DIRECTORY_DOWNLOADS, <file title>);
request.setVisibleInDownloadsUi(false); //the content will not shown in Download Manager App
mydownlodreference = downloadManager.enqueue(request);
Now the main part, in onReceive of BroadcastReceiver class
#Override
public void onReceive(Context context, Intent intent) {
DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
long reference = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
// take out the reference id from your sharedpref or database and check that referenceId with this reference
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(reference);
Cursor c = downloadManager.query(query);
c.moveToFirst();
int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_STATUS);
int status = c.getInt(columnIndex);
int fileNameIndex = c.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME);
String filePath = c.getString(fileNameIndex);
if (status == DownloadManager.STATUS_SUCCESSFUL) {
// do whatever you want here
}
}

onReceive does'n work properly

I have a download manager that downloads an image on clicking a button. with help of broadcast receivers I will do this.
below is my code:
public void myDownloadManager(){
receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(enqueue);
Cursor c = dm.query(query);
if (c.moveToFirst()) {
int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_STATUS);
if (DownloadManager.STATUS_SUCCESSFUL == c.getInt(columnIndex)) {
// download finished successfully
Log.e("count downloads", "counting");
db.insertDownloadsRows(image_id);
}
}
}
}
};
getActivity().registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
public void downloadImage(){
myDownloadManager();
dm = (DownloadManager) getActivity().getSystemService(getActivity().DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(Uri.parse("some uri"));
request.setDestinationInExternalPublicDir("some directory", name);
enqueue = dm.enqueue(request);
}
and downloadImage() is called in button's onClickListener. when I tap the button for the first time, the image will be downloaded once and the Log message shown up once, for the second time when I tap the button, the image will be downloaded once but the Log message shown up twice, and this happens as much as I tap button. why is it this way? how should it be fixed?

That happens because you are registering the receiver multiple times without unregistering it, so you have to do one of two things:
even register the receiver only once like within your onCreate() method for example (which is absolutely the better solution):
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.videoview);
myDownloadManager();
}
public void downloadImage(){
dm = (DownloadManager) getActivity().getSystemService(getActivity().DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(Uri.parse("some uri"));
request.setDestinationInExternalPublicDir("some directory", name);
enqueue = dm.enqueue(request);
}
OR call unregister receiver each time you finish dealing with the downloading file:
public void downloadImage(){
// Un-registering the receiver
unregisterReceiver(receiver);
myDownloadManager();
dm = (DownloadManager) getActivity().getSystemService(getActivity().DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(Uri.parse("some uri"));
request.setDestinationInExternalPublicDir("some directory", name);
enqueue = dm.enqueue(request);
}

During App uninstall ,How to cancel the Download?

In my app i have started download service,it is working fine in background.During download my testing team doing force stop and clear data or Uninstall.But After uninstall or clear data still my Download service is running in background.During download i have installed the same app again but it is misbehaving some thing.While uninstall or clear data or force stop i have to cancel the download How?
public class FileDownloaderService extends IntentService {
private CarcarePreferences preferences;
public FileDownloaderService() {
super("FileDownloaderService");
}
#Override
public void onCreate() {
super.onCreate();
preferences = CarcarePreferences.getCarcarePreferencesObject(getApplicationContext());
DBHelper.getInstance(getApplicationContext()).open();
downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
}
#Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
if (extras == null) {
return;
}
if (extras.containsKey("ResultReceiver")) {
resultReceiver = extras.getParcelable("ResultReceiver");
}
if (extras.containsKey("ContentToDownload")) {
contentToDownload = extras.getInt("ContentToDownload");
} else {
return;
}
if (contentToDownload != Carcare.ContentToDownload.IMAGES) {
isDefaultVehicle = extras.getBoolean("IsDefaultVehicle");
fetchVehicle();
}
switch (contentToDownload) {
case Carcare.ContentToDownload.HEADUNIT_IMAGES:
if (extras.containsKey("HeadUnits")) {
headUnits = (ArrayList<Unit>) extras.getSerializable("Units");
downloadHeadUnits();
resultReceiver.send(0, null);
}
break;
}
}
private void fetchVehicle() {
Object[] objects;
if (isDefaultVehicle) {
objects = DBAdapter.getAllVehicles(preferences.getDefaultModel(),
preferences.getDefaultYear(), isDefaultVehicle);
} else {
objects = DBAdapter.getAllVehicles(preferences.getCurrentModel(),
preferences.getCurrentYear(), isDefaultVehicle);
}
vehicle = (Vehicle) objects[0];
}
private void downloadHeadUnits() {
mHeadUnitDir = SdUtils.getDir(this);
//clearHeadUnits();
for (CUnit unit : Units) {
String fileName = mDir + "/" + unit.getGuid() + ".png";
InputStream stream = null;
final HttpGet httpRequest = new HttpGet(unit.getHuImageUrl());
httpRequest.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE);
try {
File file = new File(fileName);
if (!file.exists()) {
FileOutputStream out = new FileOutputStream(file); //openFileOutput(fileName);
stream = new DefaultHttpClient().execute(httpRequest).getEntity().getContent();
Bitmap bitmap = BitmapFactory.decodeStream(stream);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
}
} catch (IOException ex) {
ex.printStackTrace();
} catch (IllegalStateException ex) {
ex.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
private void download() {
cancelDownload(Carcare.FileType.QRG, vehicle.getPath());
deleteDoc(vehicle.getQRGPath());
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(vehicle.getUrl()));
request.setDestinationUri(Uri.parse(vehicle.getPath()));
request.setTitle("Unit");
request.setDescription("Quick Reference Guide");
preferences.setDownloadID(Carcare.FileType.QRG, downloadManager.enqueue(request));
}
}

You must use a Service.
In the Service's onDestroy(), you can write the code to finish the DownloadManager.
The Service will be killed before the app is about to uninstall.
This way the Download will stop.

Take a look at the remove() method of the DownloadManager.
It says:
public int remove (long... ids) Added in API level 9
Cancel downloads and remove them from the download manager. Each
download will be stopped if it was running, and it will no longer be
accessible through the download manager. If there is a downloaded
file, partial or complete, it is deleted. Parameters ids the IDs of
the downloads to remove Returns
the number of downloads actually removed
Edit
To intercept your application uninstall take a look at this answer.

How to receive status of download manager intent until download success or failed

Here's my problem.
I'm trying to download file from my server using download manager intent via Asynctask.
in my doInBackground of asynctask class, i was call download manager intent, and doinBackground will return boolean value when download finish (Success or Failed).
Here's my code
protected Boolean doInBackground(String... f_url) {
boolean flag = true;
boolean downloading =true;
try{
DownloadManager mManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
Request mRqRequest = new Request(
Uri.parse("http://"+model.getDownloadURL()));
long idDownLoad=mManager.enqueue(mRqRequest);
DownloadManager.Query query = null;
query = new DownloadManager.Query();
Cursor c = null;
if(query!=null) {
query.setFilterByStatus(DownloadManager.STATUS_FAILED|DownloadManager.STATUS_PAUSED|DownloadManager.STATUS_SUCCESSFUL|
DownloadManager.STATUS_RUNNING|DownloadManager.STATUS_PENDING);
} else {
return flag;
}
c = mManager.query(query);
if(c.moveToFirst()) {
int status =c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
while (downloading)
{ Log.i ("FLAG","Downloading");
if (status==DownloadManager.STATUS_SUCCESSFUL)
{ Log.i ("FLAG","done");
downloading = false;
flag=true;
break;
}
if (status==DownloadManager.STATUS_FAILED)
{Log.i ("FLAG","Fail");
downloading = false;
flag=false;
break;
}
c.moveToFirst();
}
}
return flag;
}
catch (Exception e)
{
flag = false;
return flag;
}
}
But DownloadManager status never jump on DownloadManager.STATUS_SUCCESSFUL or DownloadManager.STATUS_FAILED.

There's no need for the AsyncTask or the synchronous query. DownloadManager is already asynchronous. You should register a BroadcastReceiver for ACTION_DOWNLOAD_COMPLETE so that you get notified when the download completes (or fails).
There's a very good example at http://blog.vogella.com/2011/06/14/android-downloadmanager-example

You have to requery the download manager. The cursor stays the same even if the data changes. Try like this:
protected Boolean doInBackground(String... f_url) {
boolean flag = true;
boolean downloading =true;
try{
DownloadManager mManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
Request mRqRequest = new Request(
Uri.parse("http://"+model.getDownloadURL()));
long idDownLoad=mManager.enqueue(mRqRequest);
DownloadManager.Query query = null;
query = new DownloadManager.Query();
Cursor c = null;
if(query!=null) {
query.setFilterByStatus(DownloadManager.STATUS_FAILED|DownloadManager.STATUS_PAUSED|DownloadManager.STATUS_SUCCESSFUL|DownloadManager.STATUS_RUNNING|DownloadManager.STATUS_PENDING);
} else {
return flag;
}
while (downloading) {
c = mManager.query(query);
if(c.moveToFirst()) {
Log.i ("FLAG","Downloading");
int status =c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
if (status==DownloadManager.STATUS_SUCCESSFUL) {
Log.i ("FLAG","done");
downloading = false;
flag=true;
break;
}
if (status==DownloadManager.STATUS_FAILED) {
Log.i ("FLAG","Fail");
downloading = false;
flag=false;
break;
}
}
}
return flag;
}catch (Exception e) {
flag = false;
return flag;
}
}

Download Manager download files in asynchronous manner. So no need to put download manager inside an Asyntask.
You can use Receiver for get the status of download manager if download complete.
public class CheckDownloadComplete extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if (action.equals(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
{
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0));
DownloadManager manager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
Cursor cursor = manager.query(query);
if (cursor.moveToFirst()) {
if (cursor.getCount() > 0) {
int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
Long download_id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID,0);
// status contain Download Status
// download_id contain current download reference id
if (status == DownloadManager.STATUS_SUCCESSFUL)
{
String file = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
//file contains downloaded file name
// do your stuff here on download success
}
}
}
cursor.close();
}
}
}
Dont forget to add your receiver in Manifest
<receiver
android:name=".CheckDownloadComplete"
android:enabled="true"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
</intent-filter>
</receiver>

Downloading images with webview

I m displaying a gallery from a mobile website in webview . How can i download those images from webview ? Are there any extra settings for webview ?

This solved my problem
` `#Override
public boolean shouldOverrideUrlLoading (WebView view, String url) {
boolean shouldOverride = false;
// We only want to handle requests for image files, everything else the webview
// can handle normally
if (url.endsWith(".jpg")) {
shouldOverride = true;
Uri source = Uri.parse(url);
// Make a new request pointing to the mp3 url
DownloadManager.Request request = new DownloadManager.Request(source);
// Use the same file name for the destination
File destinationFile = new File (destinationDir, source.getLastPathSegment());
request.setDestinationUri(Uri.fromFile(destinationFile));
// Add it to the manager
manager.enqueue(request);
}
return shouldOverride;
}``
make sure to add permissions for download manager, SD read, SD write!

I think the best way to do it is to parse the html code of the page and get the images url.

Just load the URL of the image with the webview.

webview.setWebViewClient(new WebViewClient(){
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.contains("http://m.dudamobile.com/?source=DM_DIRECT") ){
DownloadManager dm = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);
Request request = new Request(
Uri.parse(url));
enqueue = dm.enqueue(request);
return true;
}
else
{
view.loadUrl(url);
return true;
}
}}
//register your broadcast reciever of Download manager in the activity
BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadId = intent.getLongExtra(
DownloadManager.EXTRA_DOWNLOAD_ID, 0);
Query query = new Query();
query.setFilterById(enqueue);
try{
Cursor c = dm.query(query);
if (c.moveToFirst()) {
int columnIndex = c
.getColumnIndex(DownloadManager.COLUMN_STATUS);
if (DownloadManager.STATUS_SUCCESSFUL == c
.getInt(columnIndex)) {
// ImageView view = (ImageView) findViewById(R.id.imageView1);
String uriString = c
.getString(c
.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
mNotificationManager.notify(1, notification);
// view.setImageURI(Uri.parse(url1));
/* Intent i = new Intent();
i.setAction(DownloadManager.ACTION_VIEW_DOWNLOADS);
startActivity(i);*/
}
}
}catch(NullPointerException e)
{
Toast.makeText(getApplicationContext(),"Item not downloadable :( ", Toast.LENGTH_LONG).show();
}
}
}
};
registerReceiver(receiver, new IntentFilter(
DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
`