Android Question What causes this problem. (SOLVED)

[ciprian]

Hello.
I'm having a serious error in my app but i don't understand where is the problem.
Everything running well in emulator, but on my phone it's crushes.
Here is the log:

JobName = job2, Success = true
--------- beginning of crash
java.lang.RuntimeException: java.io.FileNotFoundException: /data/user/0/com.cip.droid.ipx800/cache/4 (No such file or directory)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:233)
    at anywheresoftware.b4a.BA$2.run(BA.java:370)
    at android.os.Handler.handleCallback(Handler.java:789)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6938)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.io.FileNotFoundException: /data/user/0/com.cip.droid.ipx800/cache/4 (No such file or directory)
    at java.io.FileOutputStream.open0(Native Method)
    at java.io.FileOutputStream.open(FileOutputStream.java:287)
    at java.io.FileOutputStream.<init>(FileOutputStream.java:223)
    at anywheresoftware.b4a.objects.streams.File.OpenOutput(File.java:448)
    at anywheresoftware.b4a.samples.httputils2.httputils2service._hc_responsesuccess(httputils2service.java:173)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:196)
    ... 8 more

 

[ilan]

java.io.FileNotFoundException

from the logs you can see that the file you are trying to read/use does not exists. you will need to provide some code so we can see whats the problem.
are you downloading something and saving it to a file?

post the relevant code.

 

[nypaulie]

I had a "FileNotFound..." problem too. A user (sorex) told me to rename the .apk file to a .zip one so I could open it. In doing so I saw that my file Was actually missing. Try this trick to check yours.

 

[DonManfred]

I had a "FileNotFound..." problem too

Your issue is another one than this one.

This one is probably related to a httpjob

 

[Erel]

Are you checking that Job.Success is true? Are you calling Job.Release? Is it possible that there is no space left on the device?

 

[ciprian]

This is related to a http job efectively, with httputils2 library.
When i do an job.download , this causes a crash.
I've allready tried to change job.download with job.poststring... but same result.
I dont try to download some file, but just using job.download to send a http order to a http machine.
This is the code into my toogle button:

Sub tog_CheckedChange(checked As Boolean)
    Dim index As Int
    index = clv1.GetItemFromView(Sender)
    Dim pnl As Panel
    pnl = clv1.GetPanel(index)
    Dim tog As ToggleButton
    tog = pnl.GetView(2) 
    Dim btn As Button
    btn = pnl.GetView(1) 
    If checked Then
        Job2.Initialize("job2", Me)
        Job2.Username = manager.GetString("user")
        Job2.Password = manager.GetString("pass")
        Job2.Download("http://"&ServerIp&":"&port&"/leds.cgi?led="&index)
        Job2.Release
        btn.Enabled = False
    Else
        Job2.Initialize("job2", Me)
        Job2.Username = manager.GetString("user")
        Job2.Password = manager.GetString("pass")
        Job2.Download("http://"&ServerIp&":"&port&"/leds.cgi?led="&index)
        Job2.Release
        btn.Enabled = True
    End If
End Sub

I'm using a samsung galaxy s8 smartphone... dont having space issues...

Same problem into a button_click sub:

Sub Button_Click
    Dim index As Int
    index = clv1.GetItemFromView(Sender)
    Dim pnl As Panel
    pnl = clv1.GetPanel(index)
    Dim btn As Button
    btn = pnl.GetView(1)
    Dim indexOK As String = index +1
    Log(txtMsg.Text)
    Job2.Initialize("job2", Me)
    Job2.Username = manager.GetString("user")
    Job2.Password = manager.GetString("pass")
    Job2.Download("http://"&ServerIp&":"&port&"/preset.htm?RLY"&indexOK&"=1")
    Job2.Release
    ToastMessageShow("Impulsion Envoyé",True)
End Sub

 

[DonManfred]

You are not using httpjob correctly.
https://www.b4x.com/android/forum/threads/b4x-okhttputils2-with-wait-for.79345/

 

[ciprian]

Do you mean i need to change it like this?

Sub Button_Click
    Dim index As Int
    index = clv1.GetItemFromView(Sender)
    Dim pnl As Panel
    pnl = clv1.GetPanel(index)
    Dim btn As Button
    btn = pnl.GetView(1)
    Dim indexOK As String = index +1
    Log(txtMsg.Text)
    Dim Job2 as httpjob
    Job2.Initialize("job2", Me)
    Job2.Username = manager.GetString("user")
    Job2.Password = manager.GetString("pass")
    Job2.Download("http://"&ServerIp&":"&port&"/preset.htm?RLY"&indexOK&"=1")
    Wait For (Job2) JobDone(Job2 As HttpJob)
    If Job2.Success Then
        Log(Job2.GetString)
    End If
    Job2.Release
    ToastMessageShow("Impulsion Envoyé",True)
End Sub

 

[DonManfred]

yes. Or use the jobdone eventsub. The point is that you need to Release the job after the wait for resp. in the jobdone sub.

Sub Button_Click
    Dim index As Int
    index = clv1.GetItemFromView(Sender)
    Dim pnl As Panel
    pnl = clv1.GetPanel(index)
    Dim btn As Button
    btn = pnl.GetView(1)
    Dim indexOK As String = index +1
    Log(txtMsg.Text)
    dim job as httpjob ' you should initialize a new instance each time
    Job.Initialize("job2", Me)
    Job.Username = manager.GetString("user")
    Job.Password = manager.GetString("pass")
    Job.Download("http://"&ServerIp&":"&port&"/preset.htm?RLY"&indexOK&"=1")
    Wait For (Job) JobDone(Job As HttpJob)
    If Job.Success Then
        Log(Job.GetString)
    End If
    Job.Release
    ToastMessageShow("Impulsion Envoyé",True)
End Sub

 

[ciprian]

Thank you, i'll try it this morning...
Will keep you informed.

 

[ciprian]

It works now.
Thank you for your precious help, as allways.
I have to do more study from now...