Android Question katexmathview - error

[derez]

KatexMathView

It is a wrap for this Github project. No other libs required other than the attached B4A libraries. Extract them and copy them to your additional library folder. You need to download and extract this folder (https://www.dropbox.com/s/1sthbkm5vc7fa0h/katex.zip?dl=0) and copy the folder with its...

www.b4x.com

I had an older installation of it which does not run in the modern versions.
I downloaded the katexmathview library and application. It fails with the following errors:

Error occurred on line: 38 (Main)
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:155)
at anywheresoftware.b4a.objects.ActivityWrapper.LoadLayout(ActivityWrapper.java:209)
at JHS.KatexMathView.main._activity_create(main.java:395)
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:157)
at JHS.KatexMathView.main.afterFirstLayout(main.java:105)
at JHS.KatexMathView.main.access$000(main.java:17)
at JHS.KatexMathView.main$WaitForLayout.run(main.java:83)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7918)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:64)
at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:147)
... 19 more
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/content/ContextCompat;
at katex.hourglass.in.mathlib.MathView.<init>(MathView.java:51)
at mathviewwrapper.mathviewWrapper._initialize(mathviewWrapper.java:73)
... 22 more
Caused by: java.lang.ClassNotFoundException: android.support.v4.content.ContextCompat
... 24 more
** Activity (main) Resume **

Adding the additionaljar line does not help, I checked the sdk and it is installed there.

#Additionaljar: com.android.support:support-v4

The cause is: "Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/content/ContextCompat;"

I'll appreciate help here...

 

[Johan Schoeman]

It is maybe looking for this with newer android:

androidx.core.content.ContextCompat

Have not tried the project for a very long time. Will see if I can revisit it sometime this weekend.

 

[derez]

There are some errors like that in the forum but what solves there is re-installation of b4a, which does not help me here.

 

[Johan Schoeman]

There are some errors like that in the forum but what solves there is re-installation of b4a, which does not help me here.

I have wrapped the latest Github Project but get this:

The same as what I get when running the old project on my current device...

Not sure why it now renders like this....? Perhaps something to do with the device browser settings?

Anyone that can shed some light on it?

 

[Johan Schoeman]

There are some errors like that in the forum but what solves there is re-installation of b4a, which does not help me here.

Try to Clean and Jetify the project and see if the compile error goes away.

 

[derez]

It runs on an old device ver 4.0.3 , I get similar screen with the text instead of the mathview.
After cleaning the project I get no mathviews at all...

 

[Johan Schoeman]

It runs on an old device ver 4.0.3 , I get similar screen with the text instead of the mathview.

Maybe someone (@Erel) can give us some direction on how to solve the rendering.

 

[omo]

I have wrapped the latest Github Project but get this:

View attachment 148049

The same as what I get when running the old project on my current device...

Not sure why it now renders like this....? Perhaps something to do with the device browser settings?

Anyone that can shed some light on it?

If I remember very well how I resolved this kind of problem years ago in webview related blurrish text, I found the problem related to manifest. In the manifest editor, try to add this to the manifest if not there already:

SetApplicationAttribute(Android: hardwareAccelerated, false)

 

[Johan Schoeman]

If I remember very well how I resolved this kind of problem years ago in webview related blurrish text, I found the problem related to manifest. In the manifest editor, try to add this to the manifest if not there already:

SetApplicationAttribute(Android: hardwareAccelerated, false)

Does not do the trick. A bit lost why it is not rendering correctly (Android 9).

 

[omo]

Does not do the trick. A bit lost why it is not rendering correctly (Android 9).

Have you checked this thread? And hope you added that attribute rightly to the manifest?

Blurry Text in Webview?

Below is a screen shot of a weird issue I am running into on some devices. Basically, I have an activity that a webview control takes up most of the screen. In code, I am programmically generating HTML code that I then display in the webview - so all of the text that the webview displays is...

www.b4x.com

 

[Johan Schoeman]

Have you checked this thread? And hope you added that attribute rightly to the manifest?

Blurry Text in Webview?

Below is a screen shot of a weird issue I am running into on some devices. Basically, I have an activity that a webview control takes up most of the screen. In code, I am programmically generating HTML code that I then display in the webview - so all of the text that the webview displays is...

www.b4x.com

Yes, added it as what it should be but still not rendering correctly. Is it maybe a device setting that should be set?