Android Question [Solved] Public class android.support.v7.app not exist

[angel_]

I try to do this

[B4X] Cross platform example

This is a simple example that demonstrates a recommended method of sharing code and files between B4A, B4i and B4J. It is based on these tips: https://www.b4x.com/android/forum/threads/xui2d-cross-platform-tips.96815/#content The main idea is to implement everything that is possible in one or...

www.b4x.com

I have this line in activity and add it to the public class

#Extends: android.support.v7.app.AppCompatActivity

And appears this error

javac 1.8.0_201
src\com\dd\aa\m00_bb.java:9: error: package android.support.v7.app does not exist
public class m00_bb extends android.support.v7.app.AppCompatActivity implements BA.SubDelegator{
                                                             ^

 

[DonManfred]

Not enough informations.

Are you using AndroidX? If so then Redownload AppCompat 4.0

 

[angel_]

Not enough informations.
Are you using AndroidX? If so then Redownload AppCompat 4.0

This is the error

B4A Version: 9.80
Java Version: 8
Parsing code.    (0.62s)
Building folders structure.    (0.10s)
Running custom action.    (0.05s)
Running custom action.    (0.13s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Running custom action.    (0.05s)
Compiling code.    (2.91s)
Compiling layouts code.    (0.27s)
Organizing libraries.    (0.07s)
    (AndroidX SDK)
Generating R file.    (3.59s)
Compiling debugger engine code.    (7.54s)
Compiling generated Java code.    Error
javac 1.8.0_201
src\com\dd\aa\m00_bb.java:9: error: package android.support.v7.app does not exist
public class m00_bb extends android.support.v7.app.AppCompatActivity implements BA.SubDelegator{
                                                             ^
Note: src\com\dd\aa\starter.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error

Manifest

SetApplicationAttribute(android:theme, "@style/MyAppTheme")

CreateResource(values, MyAppTheme.xml,
<resources>
    <style name="MyAppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
    </style>
</resources>
)

I'm using AppCompat 4.00

 

[DonManfred]

I'm using AppCompat 4.00

Are you using AndroidX? If so then Redownload AppCompat 4.0

DID you redownloaded v4.0 of AppCompat???

 

[angel_]

DID you redownloaded v4.0 of AppCompat???

If you refer to uncheck and check the AppCompat, yes I did it with the same result

 

[DonManfred]

No.
When i want you to uncheck and recheck the library in the librarytab then i would have said it like this.

When i say ReDownload then i mean. Do the download of v4.0 again. The new download also contains a correct androidX artifact.
Use the files from the newdownload. Make sure to place all files from the download in your additional library folder.

REFRESH the librarylist after updated the files.
Clean your project and try again.

 

[angel_]

I did all steps but I have the same error.

If I delete #Extends: android.support.v7.app.AppCompatActivity in the public class I don't have any problem, despite having #Extends:... in the Main.

 

[Erel]

Two options:
1. You are using an old Android SDK. Run B4A Sdk Manager and make sure to install all recommended items.
2. You haven't followed DonManfred suggestion.

 

[angel_]

I have install all recommended items, maybe I have not explained myself well, the error only appears when I add that line to a public class

 

[Erel]

I have install all recommended items, maybe I have not explained myself well, the error only appears when I add that line to a public class

We all did it.

The problem is that you are still using an unjetified version of AppCompat. My guess is that you have an old copy in the internal libraries folder. Delete it.

Download the library again and copy it to the additional libraries folder.

 

[angel_]

I don't know what I'm doing wrong, I have the same problem.

I have deleted the android-support-v7-appcompat file from the internal libraries, reinstalled B4A and downloaded Appcompat again and applied jetified.

 

[Erel]

Have you checked the internal libraries folder?

 

[angel_]

Have you checked the internal libraries folder?

I don't see any problem, I have AppCompat in the adicional libraries, android-support-v7 file is not in the internal library (I deleted it), I've probe in other app with #Extends: android.support.v7.app.AppCompatActivity in the activities and it works well, but in this case with #Extends: android.support.v7... in the Class doesn't work

 

[Erel]

android-support-v7 file

Nobody mentioned this file.
You should delete AppCompat.xml and AppCompat.jar from the internal libraries folder.
I cannot further help here. Sorry.

 

[angel_]

Nobody mentioned this file.
You should delete AppCompat.xml and AppCompat.jar from the internal libraries folder.
I cannot further help here. Sorry.

Thank you for your patience, I will continue testing

 

[DonManfred]

Can you provide a Anydesc ID. I can help you checking your Setup. Hopefully your system is in English language ;-)

 

[angel_]

Thank you very much, it is very generous of you, I will review in depth the threads of the forum about this topic

 

[f0raster0]

I have this line in activity and add it to the public class

#Extends: android.support.v7.app.AppCompatActivity

maybe you can not use:
#Extends: android.support.v7.app.AppCompatActivity in a public class and it should be only added in Main like you are doing

 

[angel_]

Attached an example where you can see the problem, I solved it by creating an activity template which includes #Extends: android.support.v7.app.AppCompatActivity and I removed #Extends from the class, then I load each class on this template, I would like your opinions about this option

 

[Erel]

The Extends line should only be added to the activities. You shouldn't add it to classes.