iOS Question ImageDownloader

MarcoRome · Feb 27, 2018

Hi, i have this code:

B4X:

Dim m As Map
                    m.Initialize
                    m.Put(ImageView1, "https://www.devil-app.eu/xxxxxxx/pizzerie/"& m.Get("logo_pizzeria"))
                    Downloader.Download(m)

In this way i have this message:

Error downloading image: https://www.devil-app.eu/devil-app.eu/pizzerie/<null>

if i write the code so:

B4X:

Dim foto As String = "https://www.devil-app.eu/xxxxxxx/pizzerie/"& m.Get("logo_pizzeria")
                  
                    Dim m As Map
                    m.Initialize
                    m.Put(ImageView1, foto)
                    Downloader.Download(m)

work.
I dont understand why

Erel · Feb 28, 2018

What is the output of Log("m: " & m.Get("logo_pizzeria"))?

Based on the error message there is no such item in the map.

MarcoRome · Feb 28, 2018

Erel said:
What is the output of Log("m: " & m.Get("logo_pizzeria"))?

Based on the error message there is no such item in the map.

I wrote that in this mode:

B4X:

Dim foto As String = "https://www.devil-app.eu/xxxxxxx/pizzerie/"& m.Get("logo_pizzeria")
                  
                    Dim m As Map
                    m.Initialize
                    m.Put(ImageView1, foto)
                    Downloader.Download(m)

Work.

Don work if i use this code:

B4X:

 m.Put(ImageView1, "https://www.devil-app.eu/xxxxxxx/pizzerie/"& m.Get("logo_pizzeria"))

Erel · Mar 1, 2018

I don't understand your code. m.Get("logo_pizzeria") will return Null for sure as you just initialized the map. Why are you doing it?

MarcoRome · Mar 1, 2018

This isnt null. I copy only a part code. For sure m.Get("logo_pizzeria") have a value infact... if i put the value in variable (foto) work:

Dim foto As String = "https://www.devil-app.eu/xxxxxxx/pizzerie/"& m.Get("logo_pizzeria")

Dim m As Map
m.Initialize
m.Put(ImageView1, foto)
Downloader.Download(m)

but if i assign the variable in direct mode no.

m.Put(ImageView1, "https://www.devil-app.eu/xxxxxxx/pizzerie/"& m.Get("logo_pizzeria"))

The m.Get("logo_pizzeria") have value by a select

B4X:

ExecuteRemoteQuery($"Select logo_pizzeria from pizzeria_xxxx where id_utente = ${Main.id_pizzeria}"$,"CaricoLogo")

....JobDone

        Case "CaricoLogo"
                Dim VERIFICA As List
                Dim m As Map
                m.Initialize
                VERIFICA = parser.NextArray 'returns a list with maps
                If VERIFICA.Size > 0 Then
                    m = VERIFICA.Get(0)
                    Dim foto As String = "https://www.devil-app.eu/devil-app.eu/pizzerie/"& m.Get("logo_pizzeria")
                   
                    Dim m As Map
                    m.Initialize
                    'm.Put(ImageView1, "https://www.devil-app.eu/devil-app.eu/pizzerie/"& m.Get("logo_pizzeria"))
                    m.Put(ImageView1, foto)
                    Downloader.Download(m)

Erel · Mar 4, 2018

It will always be null in the code from the first post. You can also see the null string in the logs. I cannot guess what the code that you haven't posted is doing.

Check the value of foto.

iOS Question ImageDownloader

MarcoRome

Expert

Erel

B4X founder

MarcoRome

Expert

Erel

B4X founder

MarcoRome

Expert

Erel

B4X founder

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