Android Question try-catch does not work

mohsen programmer · May 7, 2024

Hello friends,

I am working on a B4A project and I got java.lang.NoClassDefFoundError: Failed resolution of: Ljava/util/Base64 error on Android 7.

I tried using try-catch to handle this error, but to no avail. The application closes completely on some devices (force close)

I jetified the library but it didn't work.
Why doesn't try-catch work in this case?
Is there a solution to prevent the app from force closing?

Erel · May 7, 2024

This is a more severe error so it cannot caught.

Use StringUtils for base64 encoding.

mohsen programmer · May 7, 2024

Erel said:
This is a more severe error so it cannot caught.

Use StringUtils for base64 encoding.

Thank you for your answer. I don't use encryption, but I use a library that probably uses the base64 class.

Erel · May 7, 2024

This means that this library is a Java library and isn't compatible with Android (at least not older versions).

mohsen programmer · May 7, 2024

Erel said:
This means that this library is a Java library and isn't compatible with Android (at least not older versions).

It works on top Androids like 12 and 13, but not on Android 7. Can't we first check if the user's Android has base64 or not?

Erel · May 10, 2024

B4X:

Private Sub CheckIfClassExists (class As String) As Boolean
    Try
        Dim j As JavaObject
        j.InitializeStatic(class)
        Return True
    Catch
        Return False
    End Try
End Sub

Android Question try-catch does not work

mohsen programmer

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Android Question try-catch does not work

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