B4A v3.80 adds support for conditional compilation.
From Wikipedia:
Conditional compilation allows you to exclude parts of the code based on the selected build configuration. You can use it to create several applications from the same project. For example you can create one application with ads and another application without ads.
Build Configurations
The build configurations dialog is available under Project -> Build Configurations (Ctrl + B).
This dialog allows you to edit or add new configurations and to choose the current active configuration.
A build configuration is made of a package name and a set of conditional symbols.
The package name replaces the previously global package field. This means that you can produce APKs with different package names from the same project. Note that multiple configurations can share the same package name.
The conditional symbols define the active compiler symbols. This allows you to exclude parts of the code based on the chosen build configuration.
You can set multiple symbols separated with commas.
There are several built-in symbols:
- B4A: B4A, DEBUG and RELEASE. Either DEBUG or RELEASE will be active based on the deployment mode.
- B4J: B4J, DEBUG, RELEASE, UI or NON_UI (based on the app type)
- B4i: B4I, DEBUG, RELEASE
Code Exclusion
With the conditional compilation feature you can exclude any code you like from the code editor, manifest editor and designer script (any text can be excluded, including complete subs and attributes).
Excluded code will not be parsed and will be effectively removed before it reaches the compiler.
Note that the manifest editor and designer script will not visualize the excluded code. However it still works properly.
The code exclusion syntax:
Each build configuration holds a set of symbols. Multiple configurations can share all or some of the symbols. This makes it possible to include or exclude code in several different configurations.
Starting from B4A v5, B4J v3 and B4i v2 more complex expressions are supported.
For example:
From Wikipedia:
In computer programming, conditional compilation is compilation implementing methods which allow the compiler to produce differences in the executable produced controlled by parameters that are provided during compilation.
Conditional compilation allows you to exclude parts of the code based on the selected build configuration. You can use it to create several applications from the same project. For example you can create one application with ads and another application without ads.
Build Configurations
The build configurations dialog is available under Project -> Build Configurations (Ctrl + B).
This dialog allows you to edit or add new configurations and to choose the current active configuration.
A build configuration is made of a package name and a set of conditional symbols.
The package name replaces the previously global package field. This means that you can produce APKs with different package names from the same project. Note that multiple configurations can share the same package name.
The conditional symbols define the active compiler symbols. This allows you to exclude parts of the code based on the chosen build configuration.
You can set multiple symbols separated with commas.
There are several built-in symbols:
- B4A: B4A, DEBUG and RELEASE. Either DEBUG or RELEASE will be active based on the deployment mode.
- B4J: B4J, DEBUG, RELEASE, UI or NON_UI (based on the app type)
- B4i: B4I, DEBUG, RELEASE
Code Exclusion
With the conditional compilation feature you can exclude any code you like from the code editor, manifest editor and designer script (any text can be excluded, including complete subs and attributes).
Excluded code will not be parsed and will be effectively removed before it reaches the compiler.
Note that the manifest editor and designer script will not visualize the excluded code. However it still works properly.
The code exclusion syntax:
B4X:
#If [symbol]
...
#End IfEach build configuration holds a set of symbols. Multiple configurations can share all or some of the symbols. This makes it possible to include or exclude code in several different configurations.
Starting from B4A v5, B4J v3 and B4i v2 more complex expressions are supported.
For example:
B4X:
#If FULL and Not(WITH_ADS)
'Do something
#Else If WITH_ADS OR (TRIAL And IN_APP)
'...
#Else
'...
#End If
Last edited: