B4A Library SD: ZipLibrary

SD_ZipLibray

Author: Star-Dust
Version: 1.03

• SD_ZipLibrary
  • Event
    • finish (Success as Boolean)
  • Functions:
    • Class_Globals As String
    • Initialize (CallBack As Object, EventName As String) As String
      Initializes the object. You can add parameters to this method if needed.
    • IsInitialized As Boolean
      Verifica se l'oggetto sia stato inizializzato.
    • unZip (FileZip As String, OutPutFolder As String) As String
    • unZipList (FileZip As String) As List
    • Zip (FilesTxt As String(), FileZip As String) As String

SD_ZipLibray

Author: Star-Dust
Version: 1.03

• SD_ZipLibrary
  • Event
    • finish (Success as Boolean)
  • Functions:
    • Class_Globals As String
    • Initialize (CallBack As Object, EventName As String) As String
      Initializes the object. You can add parameters to this method if needed.
    • IsInitialized As Boolean
      Verifica se l'oggetto sia stato inizializzato.
    • unZip (FileZip As String, OutPutFolder As String) As String
    • unZipList (FileZip As String) As List
    • Zip (FilesTxt As String(), FileZip As String) As String

List file in to Zip

Dim UZ As SD_ZipLibrary

    UZ.Initialize
    Log("File: " & File.Exists(File.DirRootExternal,fileZipName))
    Dim L As List = UZ.unZipList(File.Combine(File.DirRootExternal,fileZipName))

Unzip

Dim UZ As SD_ZipLibrary

UZ.Initialize
    UZ.unZip(File.Combine(File.DirRootExternal,fileZipName),File.Combine(File.DirRootExternal,DestinationPath))

Zip files

Dim ZL As SD_ZipLibray
Dim ListFiles as List

ZL.Initialize(Me,"ZL")
ZL.Zip(ListFiles,ZipFileName)

Wait For

Dim UZ As SD_ZipLibrary

UZ.Initialize
Log("File: " & File.Exists(File.DirRootExternal,fileZipName))
Dim L As List = UZ.unZipList(File.Combine(File.DirRootExternal,fileZipName))

Wait For UZ_finish(Success As Boolean)
Log("result:" &Success)
Log("Num: " & L.Size)

 

[Erel]

It is worth explaining the difference between this library and the archiver library: https://www.b4x.com/android/forum/threads/lib-archiver.21688/

 

[Star-Dust]

Frankly I do not know, to create my application B4J I had to create a library to compress and decompress that B4J is not found.

I used Inline Java with the native library java.util.zip. *;
Then I thought about rewriting it for B4A, I did not even see if there were other Zip libraries in B4A.

My library is very simple because I am very limited in java, I suppose @Informatix has created something more complete.

Among other things, the source code of my library can be found within this application that I shared in the forum.

So who wants to make changes can also have the source code.

 

[Erel]

Note that Archiver is also supported by B4J.

 

[Star-Dust]

Thanks, I was not sure and I solved this way.
But good to know for future uses

 

[ilan]

hi, @Star-Dust, your lib is working well for me. i have 2 questions.
the zip that is created is also created with the folder scheme as in my phone so if i zip a file in filedireinternel i get all folders to the zip and i have to dig in the zip to find the file itself. would it be possible to filter those folders and add only the file to the zip so when i open it i see all files in it and not inside folders?

question 2, it would be awesome to have a finish zip/unzip event that will be called when app has finished the job.

thanx a lot, ilan

btw. the difference between archiverplus and this lib is that archiverplus crashes on android 8+ and this one works

 

[Star-Dust]

hi, @Star-Dust, your lib is working well for me. i have 2 questions.
the zip that is created is also created with the folder scheme as in my phone so if i zip a file in filedireinternel i get all folders to the zip and i have to dig in the zip to find the file itself. would it be possible to filter those folders and add only the file to the zip so when i open it i see all files in it and not inside folders?

question 2, it would be awesome to have a finish zip/unzip event that will be called when app has finished the job.

thanx a lot, ilan

btw. the difference between archiverplus and this lib is that archiverplus crashes on android 8+ and this one works

I believe it is possible to make selections and raise a decompression file event.I've simply used a native Java library, they are really 2 lines of code.
But I have to look good, because I do not overdo myself like I did.

Do you dare to java?

 

[ilan]

I believe it is possible to make selections and raise a decompression file event.I've simply used a native Java library, they are really 2 lines of code.
But I have to look good, because I do not overdo myself like I did.

Do you dare to java?

can you post the class that you converted to b4a lib?

thank you

 

[Star-Dust]

Update 1.02 - Add finish event

 

[ilan]

Update 1.02 - Add finish event

Perfect thanx a lot !

 

[wbtcpip]

sorry but i don't know how to initialize the object

ZL.Initialize is not enough, now a callback and event are required, what i have to pass here? (note that i need to receive the finish event)

i created the sub

Sub zl_finish(Success As Boolean)

End Sub

grazie

 

[Star-Dust]

sorry but i don't know how to initialize the object

ZL.Initialize is not enough, now a callback and event are required, what i have to pass here? (note that i need to receive the finish event)

i created the sub

Sub zl_finish(Success As Boolean)

End Sub

grazie

Dim ZL As SD_ZipLibray
Dim ListFiles as List
 
ZL.Initialize(Me,"ZL")
ZL.Zip(ListFiles,ZipFileName)

 

[wbtcpip]

During compiling i get:

ZL.Zip(ListFiles,zipfilename)
javac 1.8.0_144
src\mbsoft\mblive\main.java:1335: error: incompatible types: List<Object> cannot be converted to String[]
mostCurrent._zl._v7((String[])(_listfiles.getObject()),_zipfilename);

what im doing wrong?

 

[Star-Dust]

Show your code, the error says you tried to insert a string where there should be a list.

ListFile is a array of String, which must be populated with the names of the files to be compressed complete with the path.
If you use SDK 23+ you must have access to the card

 

[wbtcpip]

Dim ListFiles As List, zipfilename As String, mbint As Int, myfile As String
    ListFiles.Initialize
    DateTime.DateFormat ="dd_MMMM_yyyy"
    For mbint=0 To 6
        myfile="MBLive_" & DateTime.Date(DateTime.Add(DateTime.Now,0,0,-mbint)) & ".txt"'
        If File.Exists(File.DirInternal, myfile) Then
            ListFiles.Add(File.Combine(File.DirInternal,myfile))
        End If
    Next
    If ListFiles.Size > 0 Then
        ZL.Initialize(Me,"ZL")
        zipfilename=File.Combine(File.DirInternal, idtelefono & "-" & DateTime.Date(DateTime.Now) & "-" & DateTime.Time(DateTime.Now) & ".zip")
        ZL.Zip(ListFiles,zipfilename)
    End If

 

[Star-Dust]

ListFiles is not a List but an Array of Strings. Change as necessary

    Dim ListFiles As List, zipfilename As String, mbint As Int, myfile As String
    ListFiles.Initialize
    DateTime.DateFormat ="dd_MMMM_yyyy"
    For mbint=0 To 6
        myfile="MBLive_" & DateTime.Date(DateTime.Add(DateTime.Now,0,0,-mbint)) & ".txt"'
        If File.Exists(File.DirInternal, myfile) Then
            ListFiles.Add(File.Combine(File.DirInternal,myfile))
        End If
    Next
    If ListFiles.Size > 0 Then
        ZL.Initialize(Me,"ZL")
        zipfilename=File.Combine(File.DirInternal, idtelefono & "-" & DateTime.Date(DateTime.Now) & "-" & DateTime.Time(DateTime.Now) & ".zip")
        ZL.Zip(ListToArray(ListFiles),zipfilename)
    End If

End Sub

Sub ListToArray(L As List) As String()
    Dim S(l.Size) As String
  
    For i=0 To L.Size-1
        S(i)=L.Get(i)
    Next
  
    Return S
End Sub

 

[wbtcpip]

all is ok now.

One last question: when i decomrpess the zip file on my windows desktop i get the full path:

"\data\user\0\mbsoft.mblive\files\MBLive_06_Novembre_2018.txt"

is there an option to zip a file without the full path? i only need "MBLive_06_Novembre_2018.txt"

 

[Star-Dust]

In my library you can select the destination folder, but recreate the original subfolders.
It is possible to delete the subfolders, but not in my library. I just realized something simple.

But you will find many libraries on the forum that is more powerful than this and will certainly better meet your needs.
I do not foresee any further updates to this library

 

[JohnC]

I can't seem to figure out how I can eliminate the separate ZL_Finish sub and simply use a "Wait For".

I tried the below, but the code just hangs:

Zip.Initialize(Me,"Zip")
Zip.Zip(ArrayofFiles, File.Combine(ZipFileDirectory,ZipFileName))
Wait For (Zip) Finish(Success As Boolean)

Anyone have any suggestions?

 

[DonManfred]

try it like this

Zip.Initialize(Me,"Zip")
Zip.Zip(ArrayofFiles, File.Combine(ZipFileDirectory,ZipFileName))
Wait For Zip_Finish(Success As Boolean)
' or 
'Wait For (Zip) Zip_Finish(Success As Boolean)