Android Question [Solved] Getting errors although the code work (at least I think so!)

[opus]

I'm trying to get my 5year old b4a project into the actual IDE (Version 10).
I got it running on a tablet connected via the B4A Bridge again, however I'm recieving Errors which I can't understand:

Error occurred on line: 50 (clKarte)
java.io.FileNotFoundException: /data/data/Opus.Patience/files/virtual_assets/kreuz1: open failed: ENOENT (No such file or directory)

Public Sub Initialize(i As Int)
    Dim k As Int 'KartenWert-Counter
    Dim l As Int 'KartenSymbol-Counter
    Dim m As Int 'KartenSet-Counter
    Dim BitmapDrawable1 As BitmapDrawable
    'Hier wird eine Karte erstellt.
    'Anhand der übergebenen Zahl wird Kartenwert, das Symbol und Rücken gesetzt.
    k=i Mod 13 'k imer 1 bis 13, also der Kartenwert!
    l=i/13 'l immer 1 bis 4, ergibt das Symbol
    If l>=4 Then
        l=l-4
    End If
    If i>=52 Then 'sind die ersten 52 Karten gemacht (4*13), wird von vorne angefangen
        m=1 'm sagt ob erstes Kartenblatt oder zweites!
    End If
    mWert=k+1
    mSymbol=l
    If l<2 Then
        mFarbe=Allgemeines.Farbe.Schwarz
    Else
        mFarbe=Allgemeines.Farbe.rot
    End If   
    BitmapDrawable1=Main.MyResources.GetApplicationDrawable("rueck" & (m+1))
    mRueckBild=BitmapDrawable1.Bitmap
    Dim temp As String 'enthält den Namen der Bilddatei!
       Select mSymbol
        Case Allgemeines.Symbol.Kreuz
            temp = Allgemeines.constKreuz
        Case Allgemeines.Symbol.Karo
            temp = Allgemeines.constKaro
        Case Allgemeines.Symbol.Herz
            temp = Allgemeines.constHerz
        Case Allgemeines.Symbol.Pik
            temp = Allgemeines.constPik
    End Select
    If  mWert <= 10 Then
        temp =temp & mWert
    Else
           Select mWert
            Case Allgemeines.kartenWert.Bube
                temp = temp & Allgemeines.constBube
            Case Allgemeines.kartenWert.Dame
                temp =  temp & Allgemeines.constDame
            Case Allgemeines.kartenWert.Koenig
                temp =temp & Allgemeines.constKoenig
        End Select
    End If
    BitmapDrawable1=Main.MyResources.GetApplicationDrawable(temp)
    mBild=BitmapDrawable1.Bitmap
    'Hier wird die Größe der Kartenbilder gesetzt, XXXXX
    mWidth = 80
    mHeight = 112   
    mID=i
End Sub

The line highlighted is line 50 in the complete class!

Why this error at this line? The app is seemingly (correct english word?) working as expected, so why this error at all? Before you ask, the file in question ("kreuz1" or Cross Ace ) is showing correctly in the app.

 

[Sagenut]

The error should be somewhere else.
In this piece of code there is no line that try to open that files.
And the file path looks strange to me, with /data/data.
More info are needed to be able to help you.
On which version of Android are you trying to run your code?
From Android 6+ is needed to request Permission to access certain directory.

 

[opus]

The error should be somewhere else.

That's what I think as well, thanks for answering!
The code line 48 would be the only one loading the file in question (in this one does work!).

I changed the manifest to

<uses-sdk android:minSdkVersion="4" android:targetSdkVersion="28"/>

targetSdkVersion was 10.
I have set permissions to

android.permission.WRITE_EXTERNAL_STORAGE *

My actual test is on a Android 4.42 device.


Testing it longer it seems that this error is shown only after starting the app (once or twice).

 

[agraham]

Read https://www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689/

 

[opus]

@agraham Thank you!

 

[Sagenut]

Can you check the exact path to your file?
Because it looks that it could be used the GetSafeDirDefaultExternal that does not need to request for Permission.
Can you show where you load that files?
Steps I suppose You need:
- enable the RuntimePermissions library
- add this to ProcessGlobals:

Private rp As RuntimePermissions

- to access your files use (rp.GetSafeDirDefaultExternal("virtual_assets"), "Kreuz1") as filepath and filename.

 

[opus]

@Sagenut :
I've read the tutorial and wil check exactly that.
As of now I'm using the files from MyResources ( saved under ../jObects/res/drawble).

 

[Sagenut]

Look at the Video Tutorial in the thread that @agraham gave you.
It's really explanatory.

 

[opus]

Why would StringFunctions need the permission

android.permission.WRITE_EXTERNAL_STORAGE

?

Is there a way around it?

 

[DonManfred]

See Post #4
IT is not related to stringfunctipns. IT is related to the path to write to.

 

[opus]

Thanks, will remove StringFunctions by the use of Regex!