Bug? Why is my app crashing in 10.2

MitchBu

Well-Known Member
Licensed User
Longtime User
My app is working just fine in B4A 10, but in 10.2, I get the java error below.

I am not versed enough in the Java errors to find out what may be going on.

Is there any way to know where I should look in my B4A code ?

java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/core/content/ContextCompat;
at anywheresoftware.b4a.objects.RuntimePermissions.GetAllSafeDirsExternal(RuntimePermissions.java:134)
at com.bujardet.checkprinter.main._sdpresent(main.java:22241)
at com.bujardet.checkprinter.main$ResumableSub_Register_Click.resume(main.java:7931)
at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resumeAsUserSub(DebugResumableSub.java:48)
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.BA.raiseEvent(BA.java:193)
at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resume(DebugResumableSub.java:43)
at anywheresoftware.b4a.keywords.Common$13.run(Common.java:1704)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:7000)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.core.content.ContextCompat" on path: DexPathList[[zip file "/data/app/com.bujardet.checkprinter-ExeAsGmAJCpbmsmQOZzglw==/base.apk"],nativeLibraryDirectories=[/data/app/com.bujardet.checkprinter-ExeAsGmAJCpbmsmQOZzglw==/lib/arm, /system/lib, /system/vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 21 more
 

josejad

Expert
Licensed User
Longtime User
Try searching, in the last days some people has reported the same,
Try to update your SDK, follow again the setup instructions

B4X RuntimePermissions Failing completely in 10.2

I just installed 10.2 partly to see if it would solve this problem. But now I get a new error - all RuntimePermissions that I use are failing with the same error. This error occurs on RP.Check(RP.PERMISSION_WRITE_EXTERNAL_STORAGE) RP.Check(RP.PERMISSION_CALL_PHONE) and...
www.b4x.com

B4A v10.2 is available for download

I'm happy to release B4A v10.2. This update adds support for the latest version of Firebase, Crashlytics and Android SDK. B4ASdkManager updated to support latest version of Android SDK command line tools. Firebase libraries updated to support latest version of Firebase SDK. OkHttp updated...
www.b4x.com
 

MitchBu

Well-Known Member
Licensed User
Longtime User
Tracking the error by stepping, I was able to find where it exactly occurs:

B4X: 
Sub SDPresent() As Boolean
    Log("---SDPresent")
    Dim rtp As RuntimePermissions
    Dim s() As String = rtp.GetAllSafeDirsExternal("")
    Return(s.Length > 1)
End Sub

It is triggered by Dim s() As String = rtp.GetAllSafeDirsExternal("")
 

MitchBu

Well-Known Member
Licensed User
Longtime User

Yes, it is the same error with RuntimePermissions. I will try to update the SDK.

Thank you José.
 

JohnC

Expert
Licensed User
Longtime User
This is a long shot, but maybe try adding this to your manifest:

B4X: 
<application android:requestLegacyExternalStorage="true"  >
 

MitchBu

Well-Known Member
Licensed User
Longtime User
I am growing desperate.

I read Erel's advice at https://www.b4x.com/android/forum/t...ailing-completely-in-10-2.122539/#post-765534 :

You are using a very old Android SDK.
Carefully follow the installation instructions and it will work: https://www.b4x.com/b4a.html
Click to expand...

So I renamed my current Android folder to Was-Android, created a new C:\Android folder, and carefully followed exactly the instructions.

Now I get the below error. I have no clue about what I should be doing



Apparently the error could be related to the content of my project, since the default "Hello world" doe not trigger it.
 

josejad

Expert
Licensed User
Longtime User
What version of android.jar have you set up in path?


  • Download B4A Full Version
  • Open B4A.
  • Choose Tools > Configure Paths.
  • Set the path to "javac.exe" if it is empty (C:\java\jdk-11.0.1\bin\javac.exe or C:\Program Files\Java\jdk1.8.0_211\bin\javac.exe).
  • Set the path to "android.jar" (C:\Android\platforms\android-30\android.jar).
 

MitchBu

Well-Known Member
Licensed User
Longtime User
Thank you José, thank you Erel. That was it.

Now, I encounter yet another issue. What could it be ? I don't call print at the launch of the app.

----

Logger connected to: samsung SM-T585
--------- beginning of main
*** Service (starter) Create ***
Starter.Service_Create
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
Samsung device
Air motion: false
Button: false
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/print/PrintHelper;
at anywheresoftware.b4a.objects.PdfDocumentWrapper$Printer.Initialize(PdfDocumentWrapper.java:119)
at com.bujardet.checkprinter.main._activity_create(main.java:941)
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 com.bujardet.checkprinter.main.afterFirstLayout(main.java:105)
at com.bujardet.checkprinter.main.access$000(main.java:17)
at com.bujardet.checkprinter.main$WaitForLayout.run(main.java:83)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:7000)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.print.PrintHelper" on path: DexPathList[[zip file "/data/app/com.bujardet.checkprinter-CkGWiPyRYLQ-YYHxMlqXCg==/base.apk"],nativeLibraryDirectories=[/data/app/com.bujardet.checkprinter-CkGWiPyRYLQ-YYHxMlqXCg==/lib/arm, /system/lib, /system/vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 18 more
** Activity (main) Resume **
 

MitchBu

Well-Known Member
Licensed User
Longtime User
You must log in or register to reply here.

Similar Threads

  • Question
Android Question Crash in Java.util.list.com
Replies
3
Views
631
drgottjr
  • Solved
Android Question help: crash in release - OK in debug
2
Replies
22
Views
2K
Zeev Goldstein
K
  • Question
Android Question B4XPages & B4XDrawer -> App Crashes when Loading page with Drawer
Replies
6
Views
2K
Keith Flanagan
K
F
  • Question
Android Question App crashes - Help needed in understanding logs
Replies
3
Views
2K
FrankBerra
F
G
  • Question
Android Question B4A 8.3 Beta - App Crashing
Replies
13
Views
1K
GuyBooth
G
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…