Android Question NullPointerException

sultan87 · Feb 22, 2016

Hello,
I have a project that works fine in debug mode
in release mode I have this error message inadvertently
An error has occurred in sub:main_drawme(javaline:624)
java.lang.NullPointerException Continue?
Below is my code

B4X:

Sub drawMe(Canv As Canvas)
   
'    Msgbox("passage 1","anomalie")
   
'    drawBackground(Canv,"anomalie")

    If ExDraw <> Null Then
'            Msgbox("passage 2","anomalie")
        ExDraw.drawBitmap2(Canv, background, 0,0, backgroundPaint)
'            Msgbox("passage 3","anomalie")
        ExDraw.save2(Canv, ExDraw.MATRIX_SAVE_FLAG)
'            Msgbox("passage 4","anomalie")
        ExDraw.scale(Canv, scale, scale)
    End If
'    Msgbox("passage 5","anomalie")
'    drawmsgboxo(Canv,"anomalie")
    drawHand(Canv)
'    Msgbox("passage 6","anomalie")
    drawTemp(Canv)
'    Msgbox("passage 7","anomalie")   
    If ExDraw <> Null Then
        ExDraw.restore(Canv)   
    End If
   
'    Msgbox("passage 8","anomalie")
   
'    If handNeedsToMove Then
'        MoveHand
'    End If
   
'    handPosition = 25.2
       
    Panel1.Invalidate
End Sub

why?
best regards

RandomCoder · Feb 22, 2016

Is it possible that ExDraw has not been initialised and so it's failing on the not null check? If it has an IsInitialised method then I would check this first before continuing with the rest of the code in your function.

sultan87 · Feb 23, 2016

RandomCoder said:
Is it possible that ExDraw has not been initialised and so it's failing on the not null check? If it has an IsInitialised method then I would check this first before continuing with the rest of the code in your function.

hello,
thank's for your response
there is no method to IsInitialized exdraw
best regards

wonder · Feb 23, 2016

How about the canvas object that you're passing? Was it set-up properly and initialized?

sultan87 · Feb 23, 2016

wonder said:
How about the canvas object that you're passing? Was it set-up properly and initialized?

hello,
I had

B4X:

    If FirstTime Then
        MyCanvas.Initialize(Panel1)
    End If

with error
now, i have

B4X:

    MyCanvas.Initialize(Panel1)

without firstime and I have no error
Thank's
best regards

Android Question NullPointerException

sultan87

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sultan87

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wonder

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sultan87

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