Android Question R8 - code now crashing

Robert Valentino · Sunday at 11:45 PM

Crash where??:

Get this crash Info

java.lang.NullPointerException
        at com.BOBs.BOBsCommon.cdropdown._vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv1(SourceFile:32)
        at com.BOBs.BOBsCommon.cdropdown._vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv4(SourceFile:273)

cdropdown line 32 says what?
public anywheresoftware.b4a.objects.B4XViewWrapper _vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv5 = null;

This make no sense to me
so I go to line 273 to see what is there
@Override
        public String toString() {
            return BA.TypeToString(this, false);
        }}
public void  _add_item(com.BOBs.BOBsCommon.cdropdown._tdropdown_itementry _itementry) throws Exception{
ResumableSub_Add_Item rsub = new ResumableSub_Add_Item(this,_itementry);
rsub.resume(ba, null);
}
The string to string does not mean anything but _add_item??

This only happen when I compile with #R8 option (probably something I did wrong years ago coming back to haunt me)

not sure how to debug (i was crashing somewhere else) until I recompiled this library with #r8 options. (not sure if this helps)

Final note this is code that has been running file (not saying it isn't my error - just how to shoot these is a problem

Peter Simpson · 2026-10-05T00:14:56+0100

Hmm, you can try adding this to the manifest file.

I would personally go with this line.

B4X:

AddProguardText(
-keep class com.BOBs.BOBsCommon.cdropdown { *; }
)

Or maybe even this.

B4X:

AddProguardText(
  -keep class com.BOBs.BOBsCommon.** { *; }
)

I doubt any of the lines above will fix your issue though...

Robert Valentino · 2026-10-05T02:50:41+0100

no. didn't help.

I believe the routine below is where it is happening

if (BA.isShellModeRuntimeCheck(ba))
this.getClass().getMethod("_class_globals", com.BOBs.BBS.cdropdown.class).invoke(this, new Object[] {null});
else

Whole Return:

public class cdropdown extends B4AClass.ImplB4AClass implements BA.SubDelegator{
    private static java.util.HashMap<String, java.lang.reflect.Method> htSubs;
    private void innerInitialize(BA _ba) throws Exception {
        if (ba == null) {
            ba = new BA(_ba, this, htSubs, "com.BOBs.BBS.cdropdown");
            if (htSubs == null) {
                ba.loadHtSubs(this.getClass());
                htSubs = ba.htSubs;
            }
            
        }
        if (BA.isShellModeRuntimeCheck(ba))
               this.getClass().getMethod("_class_globals", com.BOBs.BBS.cdropdown.class).invoke(this, new Object[] {null});
        else
            ba.raiseEvent2(null, true, "class_globals", false);
    }

Erel · 2026-10-05T04:54:35+0100

Robert, is this the full stack trace? What happens in debug mode ? Or release (not obfuscated)?

Robert Valentino · 2026-10-05T13:46:20+0100

Sorry, didn't realize I could use #r8 with debug.

its crashing on this line
mTypesDropDown.Initialize(Root, Me, "TypesList", True, IsSmallScreen)

mTyesDropDown is defined as
Private mTypesDropDown As cDropDown

it never even steps into the Initializer

cDropDown - Initialize:

Public  Sub Initialize(xRoot As B4XView, xCallRoutine As Object, xCallFunction As String, xNarrowBitmaps As Boolean, xSmallScreen As Boolean)
   
            mHideKB            = Null
           
            mRoot = xRoot
           
            mDDListItems.Initialize

            mLastSelected        = -1
            mPreviousSelected     = -1
            gNarrowBitmaps      = xNarrowBitmaps
            gSmallScreen        = xSmallScreen
           
           
            If  cRelativePosition.IsInitialized = False Then cRelativePosition.Initialize
            If  mT8TextSize.IsInitialized        = False Then mT8TextSize.Initialize
           
            InitializeCommon(mRoot, xCallRoutine, xCallFunction, xNarrowBitmaps)
End Sub

Crash Report:

pPrizeFund::Initialize
pBilling::Initialize
pScoreCollectors::Initialize
Cuts Panel Top  Small P:867
Error occurred on line: 1082 (pPrizeFund)
java.lang.NullPointerException
    at R1.a.a(SourceFile:12)
    at com.BOBs.BOBsCommon.cdropdown._vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv1(SourceFile:21)
    at com.BOBs.BOBsCommon.cdropdown._vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv4(SourceFile:273)
    at com.BOBs.BOBsCommon.cdropdown._initialize(SourceFile:46)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runVoidMethod(SourceFile:43)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(SourceFile:380)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(SourceFile:12)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(SourceFile:264)
    at anywheresoftware.b4a.debug.Debug.delegate(SourceFile:9)
    at com.BOBs.BBS.pprizefund._create_screen_common(SourceFile:28)
    at com.BOBs.BBS.pprizefund$ResumableSub_Create_Screen.resume(SourceFile:38)
    at com.BOBs.BBS.pprizefund._create_screen(SourceFile:49)
    at com.BOBs.BBS.pprizefund$ResumableSub_UI_Create.resume(SourceFile:77)
    at com.BOBs.BBS.pprizefund._ui_create(SourceFile:49)
    at com.BOBs.BBS.pprizefund$ResumableSub_B4XPage_Resize.resume(SourceFile:270)
    at com.BOBs.BBS.pprizefund._b4xpage_resize(SourceFile:46)
    at com.BOBs.BBS.pprizefund._b4xpage_created(SourceFile:57)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.debug.Debug.CallSub4(SourceFile:138)
    at anywheresoftware.b4a.debug.Debug.CallSubNew2(SourceFile:7)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.keywords.Common.CallSubDebug2(SourceFile:43)
    at com.BOBs.BBS.b4xpagesmanager._createpageifneeded(SourceFile:106)
    at com.BOBs.BBS.b4xpagesmanager._addpageandcreate(SourceFile:51)
    at com.BOBs.BBS.b4xpages._addpageandcreate(SourceFile:42)
    at com.BOBs.BBS.b4xmainpage$ResumableSub_B4XPage_Resize.resume(SourceFile:1142)
    at com.BOBs.BBS.b4xmainpage._b4xpage_resize(SourceFile:46)
    at com.BOBs.BBS.b4xmainpage$ResumableSub_B4XPage_Created.resume(SourceFile:300)
    at com.BOBs.BBS.b4xmainpage._b4xpage_created(SourceFile:35)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.debug.Debug.CallSub4(SourceFile:138)
    at anywheresoftware.b4a.debug.Debug.CallSubNew2(SourceFile:7)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.keywords.Common.CallSubDebug2(SourceFile:43)
    at com.BOBs.BBS.b4xpagesmanager._createpageifneeded(SourceFile:106)
    at com.BOBs.BBS.b4xpagesmanager._showpage(SourceFile:63)
    at com.BOBs.BBS.b4xpagesmanager._addpage(SourceFile:121)
    at com.BOBs.BBS.b4xpagesmanager._addpageandcreate(SourceFile:39)
    at com.BOBs.BBS.b4xpagesmanager._initialize(SourceFile:296)
    at com.BOBs.BBS.main$ResumableSub_SignedIn_Complete.resume(SourceFile:104)
    at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resumeAsUserSub(SourceFile:10)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(SourceFile:115)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(SourceFile:344)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(SourceFile:12)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(SourceFile:264)
    at anywheresoftware.b4a.BA.raiseEvent(SourceFile:7)
    at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resume(SourceFile:42)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(SourceFile:45)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(SourceFile:227)
    at anywheresoftware.b4a.BA.raiseEvent(SourceFile:7)
    at anywheresoftware.b4a.keywords.Common$15.run(SourceFile:19)
    at android.os.Handler.handleCallback(Handler.java:1070)
    at android.os.Handler.dispatchMessage(Handler.java:125)
    at android.os.Looper.dispatchMessage(Looper.java:358)
    at android.os.Looper.loopOnce(Looper.java:288)
    at android.os.Looper.loop(Looper.java:392)
    at android.app.ActivityThread.main(ActivityThread.java:10346)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:638)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:972)
Message longer than Log limit (4000). Message was truncated.

I cannot step into the Initialize routine - doesn't seem to like the parameters I am passing?

Attaching JavaCode for cDropDown

Tried in all release mode and fails when using #r8 - otherwise works fine.

Erel · 2026-10-05T14:24:44+0100

Where does cdropdown come from? Is this a library you created? If so, build it again. You will now have an additional Proguard file for this library.

Robert Valentino · 2026-10-05T16:04:49+0100

it was in a library. pulled it out to debug the problem

I attached the complete program. Wrote this probably 10 years ago before we had one on the site and before all the good designer stuff

has always work perfectly

Here's how it is called:

            mTypesDropDown.Initialize(Root, Me, "TypesList", True, IsSmallScreen)
            mTypesDropDown.SetBorderFrame(mTypesDropDown.MakeTDropDown_Border(cColors.White, 5dip, 3dip, cColors.DarkGray))                     
            mTypesDropDown.SetListInfo(mTypesDropDown.MakeTDropDown_Text(5dip, 18, cColors.Gray, cColors.White, Typeface.DEFAULT_BOLD, Bit.Or(Gravity.LEFT, Gravity.CENTER_VERTICAL)))
            mTypesDropDown.SetDisplayInfo(mTypesDropDown.MakeTDropDown_Text(15dip, 22, cColors.White, cColors.Blue, Typeface.CreateNew(Typeface.DEFAULT, Typeface.STYLE_ITALIC), Bit.Or(Gravity.LEFT, Gravity.CENTER_VERTICAL)))                                                           
            mTypesDropDown.Attach(sSP_TypesList)     
            
    It's creating a dropdown list and attaching it to a Panel "sSP_TypesList"

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Android Question R8 - code now crashing

Robert Valentino

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Android Question R8 - code now crashing

Robert Valentino

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Peter Simpson

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Robert Valentino

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Erel

B4X founder

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