Android Question EditText scroll

Fadi-l · Sep 17, 2015

Hi...

I'm new to B4A , I've a question please

how can I show the scroll bars ( vertical and horizontal ) ofthe EditText ( multi lines )

thank you ...

Erel · Sep 18, 2015

Try this:

B4X:

Dim jo As JavaObject = EditText1
jo.RunMethod("setScrollbarFadingEnabled", Array (False))

Luiz Fernando Orlandini · Mar 2, 2016

I used this piece of code in my APP just crash when passthrough it.

Any ideas? I just wanna to make my edit text with a vertical scroll

Thanks.

mangojack · Mar 2, 2016

what error do you get ? see logs ...

post some code to show how you use that code
[code] insert paste code here .. [/code]

Luiz Fernando Orlandini · Mar 3, 2016

mangojack said:
what error do you get ? see logs ...

post some code to show how you use that code
[code] insert paste code here .. [/code]

No errors in the logs, APP just crash, what sounds weird.

I used the same piece of code

B4X:

Dim jo As JavaObject = edtMessage
jo.RunMethod("setScrollbarFadingEnabled", Array (False))

Any thoughts?

mangojack · Mar 4, 2016

Luiz Fernando Orlandini said:
No errors in the logs, APP just crash, what sounds weird.
I used the same piece of code

You should have seen the Error .. Logs tab > Connect.

the error is : java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ScrollBarDrawable.setAlpha(int)' on a null object reference.

Hopefully someone can offer help soon.

Computersmith64 · Sep 14, 2016

Shouldn't

B4X:

jo.RunMethod("setScrollbarFadingEnabled", Array (False))

actually be

B4X:

jo.RunMethod("setScrollbarFadingEnabled", Array As Object(False))

?

- Colin.

Computersmith64 · Sep 15, 2016

AndOrNot said:
It's the same thing, when you pass an array without declaration it will be an array of object

Oh - OK, I didn't know that. I always declare it explicitly...

I don't think it's the EditText because I tried it on an EditText where I can successfully execute

B4X:

jo.RunMethod("setFocusableInTouchMode", Array As Object(True))

However if I switch it to

B4X:

jo.RunMethod("setScrollbarFadingEnabled", Array As Object(False))

I get the java.lang.NullPointerException error.

- Colin.

canalrun · Sep 15, 2016

I tried the JavaObject code shown above, because I'd really like to have scrollbars in my EditText.

I also got the NullPointerException error, but it seemed to reference a pointer to a scrollbar that did not exist. I'm guessing that the EditText does not have an embedded scrollbar object.

I did a Google search and a found a StackOverflow similar question. The response seemed to say that a res XML file needs to be modified to include a vertical scrollbar in the EditText object:

http://stackoverflow.com/questions/6555986/android-how-to-set-scrollbar-in-edittext

But, modifying res XML files is beyond my capability.

Hopefully someone can confirm and describe how this is done.

JohnC · Mar 23, 2017

Nobody found a solution to this?

I get the same error:

B4X:

java.lang.NullPointerException
    at android.view.View.onDrawScrollBars(View.java:11820)
    at android.view.View.draw(View.java:14186)
    at android.view.View.draw(View.java:14064)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14062)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14062)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14183)
    at android.widget.FrameLayout.draw(FrameLayout.java:467)
    at android.widget.ScrollView.draw(ScrollView.java:2386)
    at android.view.View.draw(View.java:14064)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14062)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14062)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14062)
    at android.view.ViewGroup.drawChild(ViewGroup.java:3024)
    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2893)
    at android.view.View.draw(View.java:14183)
    at android.widget.FrameLayout.draw(FrameLayout.java:467)
    at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2453)
    at android.view.ViewRootImpl.drawSoftware(ViewRootImpl.java:2541)
    at android.view.ViewRootImpl.draw(ViewRootImpl.java:2435)
    at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2303)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2109)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1179)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4861)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
    at android.view.Choreographer.doCallbacks(Choreographer.java:562)
    at android.view.Choreographer.doFrame(Choreographer.java:532)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
    at android.os.Handler.handleCallback(Handler.java:725)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5293)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
    at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
    at dalvik.system.NativeStart.main(Native Method)

Roberto P. · Sep 4, 2017

Hi all
I've the same error!
Thanks

Creideiki · Feb 15, 2021

I know the thread is old... but is there a solution for this?

Mahares · Feb 15, 2021

Creideiki said:
I know the thread is old... but is there a solution for this?

Take a look at the B4XLongTextTemplate in B4xViews library.:

[B4X] XUI Views - Cross platform views and dialogs

XUI Views is a b4x library (https://www.b4x.com/android/forum/threads/100383/#content). The same b4xlib library is compatible with B4A, B4i and B4J It is a collection of custom views and dialogs. Everything is written in B4X. The source code is included inside the b4xlib file, which is a zip...

www.b4x.com

Android Question EditText scroll

Fadi-l

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Erel

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Luiz Fernando Orlandini

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mangojack

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Luiz Fernando Orlandini

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JohnC

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Roberto P.

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Creideiki

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Mahares

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[B4X] XUI Views - Cross platform views and dialogs

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