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Welcome to B4X forum!
B4X is a set of simple and powerful cross platform RAD tools:
B4A
(free) - Android development
B4J
(free) - Desktop and Server development
B4i
- iOS development
B4R
(free) - Arduino, ESP8266 and ESP32 development
All developers, with any skill level, are welcome to
join the B4X community
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B4A - Android
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Android Questions
Please post any technical question in this forum.
Libraries developers questions
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8.1K
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8.1K
Java Question
Youtube Player lib problem
Nov 9, 2025
achank
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Layout and designer script shows correct position, but view is "cut off" when in debug and release mode?
Daica
Jun 25, 2021
Answers
4
Views
1K
Jun 27, 2021
Erel
A
targetSdkVersion=30
Alex_197
Jun 25, 2021
Answers
3
Views
2K
Jun 27, 2021
Erel
Intermittent application problem
jose luis gudino
Jun 26, 2021
Answers
14
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3K
Jun 27, 2021
jose luis gudino
Problem with Initializing JavaObject and running methods
Claude Obiri Amadu
Jun 26, 2021
Answers
0
Views
722
Jun 26, 2021
Claude Obiri Amadu
Receive and save photos
SMOOTSARA
Jun 26, 2021
Answers
1
Views
1K
Jun 26, 2021
mcqueccu
G
When compiling the B4A software, it does not pass, and the following error occurs:
goomoo
Jun 26, 2021
Answers
6
Views
2K
Jun 26, 2021
Shelby
D
[Solved]Error building bundle
DataMiser
Jun 26, 2021
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1
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2K
Jun 26, 2021
DataMiser
D
felUSBSerial library does not receive data
yo3ggx
Jun 24, 2021
Answers
16
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5K
Jun 26, 2021
agraham
xcustomlistview lazy loading
RUNO
Jun 26, 2021
Answers
6
Views
1K
Jun 26, 2021
TILogistic
Turn On Screen Programmatically
Marcos Alves
Aug 8, 2019
Answers
7
Views
7K
Jun 26, 2021
LucaMs
I
Change Project Attributes
invocker
Mar 8, 2020
Answers
4
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2K
Jun 26, 2021
JohnDovey
ContentChooser proper mime
Robert Valentino
Jun 22, 2021
Answers
5
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3K
Jun 25, 2021
Robert Valentino
N
Crashlytics Fatal Exception: java.lang.IllegalStateException
ntuser04
Jun 17, 2021
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5
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3K
Jun 25, 2021
ntuser04
N
Firebase Storage - Never times out
Robert Valentino
Mar 25, 2021
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7
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2K
Jun 25, 2021
Robert Valentino
FTP doesn't work over 4G, only Wifi
adriano.freitas
Jun 22, 2021
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10
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6K
Jun 25, 2021
adriano.freitas
Upgraded B4A / Files and media permissions denied
almontgreen
Jun 24, 2021
Answers
7
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3K
Jun 25, 2021
agraham
S
Logs not showing
Stefano Di Chiano
Jun 25, 2021
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4
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2K
Jun 25, 2021
Stefano Di Chiano
S
P
[SOLVED] Error when running app - java.lang.ClassNotFoundException:
Peter Lewis
Jun 24, 2021
Answers
9
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6K
Jun 25, 2021
Peter Lewis
P
D
Not able to detect orientation in Android 11?
Daica
Jun 25, 2021
Answers
0
Views
753
Jun 25, 2021
Daica
D
ScrollView Position
adriano.freitas
Jun 22, 2021
Answers
7
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2K
Jun 25, 2021
adriano.freitas
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