Android Question Need to get Bmp from content URI

[Steini1980]

Could someone help me implementing this Java code in my B4A Project:

InputStream istr = contentResolver.openInputStream(uri);
BufferedInputStream buf_istr = new BufferedInputStream(istr, 8192);
Bitmap bm = BitmapFactory.decodeStream(buf_istr);

B4A ContentResolver doesn't supports the method openInputStream(uri)
And the ContentProvider doesn't results TableData, it results the Bitmap directly.

 

[Erel]

You can see the logs if you enable USB debugging and connect with a USB cable (you can then use adb from Android SDK).

Why don't you add a Try / Catch block to handle this situation?

 

[Steini1980]

In the original App I handle this via Try/Catch, but the exception does always breaks here and the customer can't export images from App to the ERP solution.
It's important to solve the problem. On development device it works proberly, but on customer device some users getting always this error. If it's not possible to read the logs on runtime, I hope the customer will ship me his device as parcel, so I can connect the device on the development environment and debug.

 

[Erel]

Are you sure that the ERP app allows other apps to get images from it?

 

[Steini1980]

I think the're no security restrictions to allow/disallow the communication between apps. I have developed the interface between apps on close collaboration with the developer. It seems that some images are exportable, but not all. The error is very odd, If I request an invalid ID the app should deliver dummy data but not NULL.

 

[Steini1980]

Now I have the customers Tablet here for Debug, here the results of the Cue Stack:

java.lang.NullPointerException
    at android.os.Parcel.readException(Parcel.java:1471)
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:185)
    at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:148)
    at android.content.ContentProviderProxy.openTypedAssetFile(ContentProviderNative.java:682)
    at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1073)
    at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:913)
    at android.content.ContentResolver.openInputStream(ContentResolver.java:638)
    at anywheresoftware.b4a.objects.streams.File.OpenInput(File.java:206)
    at b4a.dms.poellath.datainterchange._projektexport(datainterchange.java:2266)
    at b4a.dms.poellath.datainterchange._button2_click(datainterchange.java:697)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:174)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:162)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:158)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:66)
    at android.view.View.performClick(View.java:4637)
    at android.view.View$PerformClick.run(View.java:19422)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5479)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
    at dalvik.system.NativeStart.main(Native Method)

I get 90% of the Data without any problems, but the're a kind of images which causes this NullPointerException.
But the Data of both Apps seems good.
Ideas?!?

There is another Method to Open the Image via Intent for Edit, this works fine!
Only the Data export causes the failure:

Sub ImageMeterOpenEdit(Dateiname As String)
  Dim In As Intent
  'In.Initialize(In.ACTION_SEND,"")
  In.Initialize("","")
  In.SetComponent("de.dirkfarin.imagemeterpro/de.dirkfarin.imagemeter.lib.MeasureActivity")
  In.PutExtra("de.dirkfarin.imagemeter.image_id",getImageIdByFilename(Dateiname))
  In.PutExtra("de.dirkfarin.imagemeter.folder_id",2)
  Log("Öffne Imagemeter ID: "& getImageIdByFilename(Dateiname) &" / "& Dateiname)
  StartActivity(In)
End Sub

 

[Erel]

Can you post the code in projektexport?

 

[Steini1980]

Here the Code again:

Sub Button1_Click
  Dim url As String
  Dim LongVal As Long
  Dim dialog As InputDialog
  dialog.InputType = dialog.INPUT_TYPE_NUMBERS
  dialog.Show("ImageMeter Image ID","Eingabe","OK","","",Null)
  If dialog.Response = DialogResponse.POSITIVE Then

      LongVal = dialog.Input
      If LongVal <> -1 Then  
        url = "content://de.dirkfarin.imagemeterpro/image/anno/" & LongVal
        File.Delete(File.DirDefaultExternal, "test_"& LongVal &".jpg")
        Dim jo As JavaObject
        jo.InitializeStatic("anywheresoftware.b4a.objects.streams.File")
        Dim In As InputStream = File.OpenInput(jo.GetField("ContentDir"), url)
        Dim bmp As Bitmap
        bmp.Initialize2(In)
        In.Close
        Dim out As OutputStream
        out = File.OpenOutput(File.DirDefaultExternal, "test_"& LongVal &".jpg",False)
        bmp.WriteToStream(out,80,"JPEG")
        out.Close
        ImageView1.Bitmap = LoadBitmap(File.DirDefaultExternal,"test_"& LongVal &".jpg")
      End If
  End If
End Sub

This Line causes the Error:
Dim In As InputStream = File.OpenInput(jo.GetField("ContentDir"), url)

 

[Erel]

How do you know that the url is correct?

 

[Steini1980]

I have checked the url in Debugger and it seems good. If the LongVal isn't correct, the ContentProviders delivers an Dummy image with Text "Cannot find image", so I get in each case an image as result from ImageMeter.

 

[Erel]

All that I can say from the logs is that it fails to open this url. Maybe there will be more information in the unfiltered logs.