Android Tutorial Download huge files with HttpUtils2

Erel · Jun 13, 2013

Better to use: https://www.b4x.com/android/forum/threads/simple-progress-http-download.127214/#post-796463

The attached project includes a slightly modified version of HttpUtils2 and a new service named DownloadService. The purpose of DownloadService is to make it simple to download files of any size.

It is very simple to use this service.

Start a download:

B4X:

Sub btnDownload_Click
   Dim dd As DownloadData
   dd.url = link1 '<--- download link
   dd.EventName = "dd"
   dd.Target = Me
   CallSubDelayed2(DownloadService, "StartDownload", dd)
End Sub

Handle the events:

B4X:

Sub dd_Progress(Progress As Long, Total As Long)
   ProgressBar1.Progress = Progress / Total * 100
   Label1.Text = NumberFormat(Progress / 1024, 0, 0) & "KB / " & _
      NumberFormat(Total / 1024, 0, 0) & "KB"
End Sub

Sub dd_Complete(Job As HttpJob)
   Log("Job completed: " & Job.Success)
   Job.Release
End Sub

Cancel a download:

B4X:

Sub btnCancel_Click
   CallSubDelayed2(DownloadService, "CancelDownload", link1)
End Sub

DownloadService allows you to download multiple files at once and track the progress of each one of them.

The following libraries are required:
OkHttp
StringUtils
Phone (required in order to acquire a partial lock during the download)
RandomAccessFile

As this is a modified version of OkHttpUtils2 you should not reference OkHttpUtils2 library. You should instead add the three modules from the attached project. Note that the modified code is in Sub hc_ResponseSuccess.

incendio · Oct 13, 2014

As this is a modified version of HttpUtils2 you should not reference HttpUtils2 library. You should instead add the three modules from the attached project.

Hi guys,

I used RDC in my app, without HttpUtils2 library, RDC doesn't work, is it possible to make download & RDC works?

Thanks in advance.

Erel · Oct 13, 2014

Which error do you get when you use these modules with RDC?

incendio · Oct 13, 2014

I got error message like this :
Unfortunately myapp has closed.

Myapp just quit. It was happen on login, which I use RDC to load user name & password from remote server.

Erel · Oct 13, 2014

Check the logs. You will find the full error message there.

You can always change HttpJob and HttpUtils2Service names to HttpJob2 and HttpUtils2Service2 and then add a reference to HttpUtils2 library.

However you will also need to update the code in HttpJob2 and HttpUtils2Service2 so the new modules are used.

incendio · Oct 14, 2014

I renamed HttpJob and HttpUtils2Service, RDC worked fine, but there are 2 errors
1) Downloading running but Progress bar and label that shows downloaded size was not updated
2) After Downloading running for a while, it raised an error : "Unfortunately myapp has stopped"

Downloading is point to dropbox. Use friend phone to test it, but this device not attached to pc, so don't know the logs.

My tablet is attached to PC but for a strange reason, this tablet can't even connect to www.dropbox.com, thats why, tested on friend phone.

If only running your example (without HttpUtils2 library) on phone, it was ok. I guest it was conflict with HttpUtils2 library.

ibra939 · Oct 25, 2014

Erel said:

B4X:

Dim out As OutputStream = File.OpenOutput(...) 'target folder
File.Copy2(Job.GetInputStream, out)
out.Close

Erel this for saving the file or URL ?

ibra939 · Oct 25, 2014

Problem attached file

Erel · Oct 26, 2014

Your dd_complete code is wrong.

It should be:

B4X:

Sub dd_Complete(Job As HttpJob)
   Log("Job completed: " & Job.Success)
   If Job.Success Then
   Dim OutStream As OutputStream
  Log("DownloadReady: "&Job.Tag)
  OutStream = File.OpenOutput(File.DirRootExternal, Job.Tag, False) ' Job.Tag is read to set the Original Filename we specify earlier in the creation of the Job
  File.Copy2(Job.GetInputStream,OutStream) ' save the file
  OutStream.Close
 End IF
Job.Release
End Sub

ibra939 · Oct 26, 2014

Erel said:

Your dd_complete code is wrong.

It should be:

B4X:

Sub dd_Complete(Job As HttpJob)
   Log("Job completed: " & Job.Success)
   If Job.Success Then
   Dim OutStream As OutputStream
  Log("DownloadReady: "&Job.Tag)
  OutStream = File.OpenOutput(File.DirRootExternal, Job.Tag, False) ' Job.Tag is read to set the Original Filename we specify earlier in the creation of the Job
  File.Copy2(Job.GetInputStream,OutStream) ' save the file
  OutStream.Close
End IF
Job.Release
End Sub

thanks for your help Erel ....

ibra939 · Oct 26, 2014

, IsInitialized=true]: open failed: ENOENT (No such file or directory) mp3 file Link

Erel · Oct 26, 2014

You should post the full error message and the relevant code.

ibra939 · Oct 26, 2014

ibra939 said:
, IsInitialized=true]: open failed: ENOENT (No such file or directory) mp3 file Link

Erel said:
You should post the full error message and the relevant code.

but the size for the file 850kb .....not working donload as i test pdf file

** Activity (main) Pause, UserClosed = false **

** Activity (main) Resume **

** Activity (main) Create, isFirst = true **

** Activity (main) Resume **

** Service (downloadservice) Create **

** Service (downloadservice) Start **

** Service (httputils2service) Create **

** Service (httputils2service) Start **

false

java.io.FileNotFoundException: /storage/sdcard0/Android/data/B.altoki/files/[CountingStream=(MyOutputStream) anywheresoftware.b4a.randomaccessfile.CountingStreams$MyOutputStream@414aea70, Data=[EventName=dd, url=http:/moysar.com/download/molay.mp3, Target=class B.altoki.main

, IsInitialized=false], Total=880768
, IsInitialized=true]: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:460)
at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
at anywheresoftware.b4a.objects.streams.File.OpenOutput(File.java:370)
at B.altoki.main._dd_complete(main.java:378)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:175)
at anywheresoftware.b4a.keywords.Common$5.run(Common.java:952)
at android.os.Handler.handleCallback(Handler.java:800)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:194)

at android.app.ActivityThread.main(ActivityThread.java:5371)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
at libcore.io.IoBridge.open(IoBridge.java:444)
... 16 more
java.io.FileNotFoundException: /storage/sdcard0/Android/data/B.altoki/files/[CountingStream=(MyOutputStream) anywheresoftware.b4a.randomaccessfile.CountingStreams$MyOutputStream@414aea70, Data=[EventName=dd, url=http:/moysar.com/download/molay.mp3, Target=class B.altoki.main
, IsInitialized=false], Total=880768
, IsInitialized=true]: open failed: ENOENT (No such file or directory)
** Activity (main) Pause, UserClosed = true **

Cableguy · Oct 26, 2014

aren't you missing an extra '/' here?

....http://moysar.com/download/molay.mp3...

ibra939 · Oct 26, 2014

Cableguy said:
aren't you missing an extra '/' here?

....http://moysar.com/download/molay.mp3...

i created as this u can check

https://www.mediafire.com/?dg9tc015n7kz0zu

Cableguy · Oct 26, 2014

for the day I cannot help you much. I will try to help you with this tomorow.
in the meanwhile, try to create a paralel simpler project just to accomplish file download... then you can start building on it...

ibra939 · Oct 26, 2014

Cableguy said:
for the day I cannot help you much. I will try to help you with this tomorow.
in the meanwhile, try to create a paralel simpler project just to accomplish file download... then you can start building on it...

Playing working fine but downloading i tried to do it .............

Cableguy · Oct 26, 2014

have you tried to download via browser in a pc? just to make sure the file is not download protected...

ibra939 · Oct 26, 2014

Cableguy said:
have you tried to download via browser in a pc? just to make sure the file is not download protected...

browser working fine

Erel · Oct 27, 2014

You haven't fixed the code like I told you. Fix it and then post your code in Sub dd_complete.

ibra939 · Oct 27, 2014

Erel said:
You haven't fixed the code like I told you. Fix it and then post your code in Sub dd_complete.

my i upload other file this with your code i inserted the change file .....
https://www.mediafire.com/?9aykcnnsvl0fxv0

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