Android Question Is this a bug or I forgot the most basic command ?

rdkartono

Member
Licensed User
Longtime User
Long time not touching B4A.

I just want to create a panel and loadlayout to it . Very simple, right ?


customview class: 
'Custom View class
#Event: ExampleEvent (Value As Int)
#DesignerProperty: Key: BooleanExample, DisplayName: Boolean Example, FieldType: Boolean, DefaultValue: True, Description: Example of a boolean property.
#DesignerProperty: Key: IntExample, DisplayName: Int Example, FieldType: Int, DefaultValue: 10, MinRange: 0, MaxRange: 100, Description: Note that MinRange and MaxRange are optional.
#DesignerProperty: Key: StringWithListExample, DisplayName: String With List, FieldType: String, DefaultValue: Sunday, List: Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday
#DesignerProperty: Key: StringExample, DisplayName: String Example, FieldType: String, DefaultValue: Text
#DesignerProperty: Key: ColorExample, DisplayName: Color Example, FieldType: Color, DefaultValue: 0xFFCFDCDC, Description: You can use the built-in color picker to find the color values.
#DesignerProperty: Key: DefaultColorExample, DisplayName: Default Color Example, FieldType: Color, DefaultValue: Null, Description: Setting the default value to Null means that a nullable field will be displayed.
Sub Class_Globals
    Private mEventName As String 'ignore
    Private mCallBack As Object 'ignore
    Private mBase As Panel
    Private Const DefaultColorConstant As Int = -984833 'ignore
    
    Private sp As ScrollView
    Private spkvarpanel As Panel
    Private airvarpanel As Panel
End Sub

Public Sub Initialize (Callback As Object, EventName As String)
    mEventName = EventName
    mCallBack = Callback
    
    sp.Initialize(1000dip)
    spkvarpanel.Initialize("spkvarpanel")
    spkvarpanel.LoadLayout("newlayout")
    airvarpanel.Initialize("airvarpanel")
    Log("VarPanel initialized")
End Sub

Public Sub DesignerCreateView (Base As Panel, Lbl As Label, Props As Map)
    mBase = Base
    mBase.AddView(sp,2dip, 2dip, mBase.Width-4dip, mBase.Height-4dip)
    
    Log("Varpanel DesignerCreateView")
End Sub

Public Sub GetBase As Panel
    Return mBase
End Sub


Layout file "newlayout" is completely empty layout, but an exist .bal file



But I am getting this exception :

exception code: 
Logger connected to:  HUAWEI LIO-L29
--------- beginning of system
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
Panel size is unknown. Layout may not be loaded correctly.
Error occurred on line: 26 (VarPanel)
java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:170)
    at anywheresoftware.b4a.objects.PanelWrapper.LoadLayout(PanelWrapper.java:134)
    at gtc.splcalculator.varpanel._initialize(varpanel.java:130)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:197)
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:61)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    at anywheresoftware.b4a.objects.ActivityWrapper.LoadLayout(ActivityWrapper.java:209)
    at gtc.splcalculator.main._activity_create(main.java:392)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at gtc.splcalculator.main.afterFirstLayout(main.java:105)
    at gtc.splcalculator.main.access$000(main.java:17)
    at gtc.splcalculator.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:900)
    at android.os.Handler.dispatchMessage(Handler.java:103)
    at android.os.Looper.loop(Looper.java:219)
    at android.app.ActivityThread.main(ActivityThread.java:8349)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:44)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    ... 29 more
** Activity (main) Resume **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
Panel size is unknown. Layout may not be loaded correctly.
Error occurred on line: 26 (VarPanel)
java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:170)
    at anywheresoftware.b4a.objects.PanelWrapper.LoadLayout(PanelWrapper.java:134)
    at gtc.splcalculator.varpanel._initialize(varpanel.java:130)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:197)
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:61)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    at anywheresoftware.b4a.objects.ActivityWrapper.LoadLayout(ActivityWrapper.java:209)
    at gtc.splcalculator.main._activity_create(main.java:392)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at gtc.splcalculator.main.afterFirstLayout(main.java:105)
    at gtc.splcalculator.main.access$000(main.java:17)
    at gtc.splcalculator.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:900)
    at android.os.Handler.dispatchMessage(Handler.java:103)
    at android.os.Looper.loop(Looper.java:219)
    at android.app.ActivityThread.main(ActivityThread.java:8349)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:44)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    ... 29 more
** Activity (main) Resume **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
Panel size is unknown. Layout may not be loaded correctly.
Error occurred on line: 26 (VarPanel)
java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:170)
    at anywheresoftware.b4a.objects.PanelWrapper.LoadLayout(PanelWrapper.java:134)
    at gtc.splcalculator.varpanel._initialize(varpanel.java:130)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:197)
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:61)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    at anywheresoftware.b4a.objects.ActivityWrapper.LoadLayout(ActivityWrapper.java:209)
    at gtc.splcalculator.main._activity_create(main.java:392)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at gtc.splcalculator.main.afterFirstLayout(main.java:105)
    at gtc.splcalculator.main.access$000(main.java:17)
    at gtc.splcalculator.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:900)
    at android.os.Handler.dispatchMessage(Handler.java:103)
    at android.os.Looper.loop(Looper.java:219)
    at android.app.ActivityThread.main(ActivityThread.java:8349)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:44)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    ... 29 more
** Activity (main) Resume **
Service started in the background. Trying to start again in foreground mode.
*** Service (starter) Create ***
** Service (starter) Start **
Service started in foreground mode.
** Activity (main) Create, isFirst = true **
Panel size is unknown. Layout may not be loaded correctly.
Error occurred on line: 26 (VarPanel)
java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:170)
    at anywheresoftware.b4a.objects.PanelWrapper.LoadLayout(PanelWrapper.java:134)
    at gtc.splcalculator.varpanel._initialize(varpanel.java:130)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:197)
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:61)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    at anywheresoftware.b4a.objects.ActivityWrapper.LoadLayout(ActivityWrapper.java:209)
    at gtc.splcalculator.main._activity_create(main.java:392)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at gtc.splcalculator.main.afterFirstLayout(main.java:105)
    at gtc.splcalculator.main.access$000(main.java:17)
    at gtc.splcalculator.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:900)
    at android.os.Handler.dispatchMessage(Handler.java:103)
    at android.os.Looper.loop(Looper.java:219)
    at android.app.ActivityThread.main(ActivityThread.java:8349)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to android.widget.TextView
    at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:44)
    at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
    ... 29 more
** Activity (main) Resume **

Of course I browsed this forum threads before posting it :

Scrollview, layouts and getting current selected

Hi, I like the scrollview so much that i want to use it to replace my Listviews, simply because it is much more flexible. What I want to do it taking one layout file and load that one into a scrollview multiple times. However, I have some practical problems solving my wishes. - how...
www.b4x.com

Catch-22 with Panels and LoadLayout.

When creating a Panel in code, I need to define its size to match the dimensions of the layout which will be loaded into it using the LoadLayout method. If the size of the Panel is not correct, the layout won't display properly. But the dimensions of the layout are only available once it has...
www.b4x.com

B4A version : 10.2
Core version : 9.90
XUI version : 2.00
 
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agraham

Expert
Licensed User
Longtime User
You haven't initialized the panels and scrollview. Because they are not declared in the designer you need to initialize them yourself.
Sorry. Forget this rubbish. I obviously haven't woken up properly and my morning tea fix hasn't kicked in properly yet.
 
Upvote 0

rdkartono

Member
Licensed User
Longtime User
Erel said:
I recommend you to use the Custom View (XUI) template. It is better.

This error means that a global view variable has the wrong type. If you can't find it then please upload the project.
Click to expand...
well actually, the code i posted here, is a 2 times downgrade.
first time, I use B4XPages (newest), then found this error .
confused, I downgrade my codes to XUI Custom View, but still same error
furiously , I downgrade my codes again to become old stype Custom View (this code), yet still error the same
 

Attachments

  • SPLCalc.zip
    14.3 KB · Views: 227
Upvote 0

rdkartono

Member
Licensed User
Longtime User
morning tea is not enough caffein , my friend .
double shots espresso should do the job
 
Upvote 0

Erel

B4X founder
Staff member
Licensed User
Longtime User
You cannot load a layout while another layout is being loaded.

If you want to load a layout in a custom view then it needs to be done like this:
B4X: 
Public Sub DesignerCreateView (Base As Panel, Lbl As Label, Props As Map)
    mBase = Base
    mBase.AddView(sp,2dip, 2dip, mBase.Width-4dip, mBase.Height-4dip)
    
    Sleep(0)
     'you can load a layout here
End Sub
 
Upvote 0

rdkartono

Member
Licensed User
Longtime User

I can confirm this work. Thanks Erel !
 
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