Rebuilding the Delphi & C++Builder Android Java files

Some while back I posted a command script (or batch file as we used to call them) that could be used by RAD Studio 10.3 users if they felt the need to change any of the few Java files underlying Delphi's (and C++Builder's) Android RTL and FireMonkey code.

The script would rebuild all the Java files into the required fmx.dex.jar and fmx.jar archives and copy them into the relevant RAD Studio installation folders to be used on subsequent builds.

When I tried to use the script with RAD Studio 10.3.3 of course it didn't work as things have changed, different files need to be involved in the process. I have updated the script now to work with RAD Studio 10.3.3 and thought I'd share it in case anyone else needs to do this.

An obvious question is: Why would anyone else want to rebuild the Java Android RTL files? Well this is normally a necessary step if you find an issue in the code as Embarcadero ships it and you want to try to fix it or enhance it. Indeed the previous post on rebuilding the 10.3 Java files was all about patching the Java code to get Android Intent support working.

If you have no interest in tweaking the Java code or fixing any issues you encounter in the Java code then you probably won't be needing this script.

If you do need the script, remember to take a backup of your original compiled archives before you proceed. These are found in:

• C:\Program Files (x86)\Embarcadero\Studio\20.0\lib\android\debug\fmx.jar
• C:\Program Files (x86)\Embarcadero\Studio\20.0\lib\android\debug\fmx.dex.jar
• C:\Program Files (x86)\Embarcadero\Studio\20.0\lib\android\release\fmx.jar
• C:\Program Files (x86)\Embarcadero\Studio\20.0\lib\android\release\fmx.dex.jar

The script needs to be run from an administrative command prompt and before you run it you should double-check the various paths set up in the environment variables at the start are all valid on your system.

The script can be found below (apologies for any layout issues caused by longer lines than the narrow blog width); hat-tip and thanks to Tom Byrnes for test-driving it:

@echo off
cls

rem Android RTL Java files rebuilder for RAD Studio 10.3.3

setlocal enabledelayedexpansion

rem Set environment variables
rem *NOTE*: check these folders match your setup

set EMBT=Embarcadero\Studio\20.0
set BDS=%ProgramFiles(x86)%\%EMBT%
set JAVA_PATH=%ProgramFiles%\Java\jdk1.8.0_60\bin
rem This is the default path for the Android SDK when installed from the .iso installer
set SDK_PATH=%PUBLIC%\Documents\%EMBT%\PlatformSDKs\android-sdk-windows
if not exist "%SDK_PATH%\" (
  rem This is the default path for the Android SDK when installed from the web install (aka ESD install)
  set SDK_PATH=%PUBLIC%\Documents\%EMBT%\CatalogRepository\AndroidSDK-2525_20.0.36039.7899
)

rem Set more environment variables based on those above

set DX_PATH=%SDK_PATH%\build-tools\28.0.2
set ANDROID_JAR=%SDK_PATH%\platforms\android-26\android.jar
set BDS_LIB=%BDS%\lib
set BDS_DEBUG_LIB=%BDS%\lib\android\debug
set BDS_RELEASE_LIB=%BDS%\lib\android\release
set FMX_SRC_PATH=%BDS%\source\rtl\androiddex\java\fmx
set CLASS_PATH=%ANDROID_JAR%
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\android-support-v4.jar
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\cloud-messaging.jar
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\com-google-android-gms.play-services-base.16.0.1.jar
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\com-google-android-gms.play-services-maps.16.1.0.jar
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\debug\com-google-android-gms.play-services-ads.17.2.0.jar
rem For adListener
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\com-google-android-gms.play-services-ads-lite.17.2.0.jar
rem For AbstractSafeParcelable
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\com-google-android-gms.play-services-basement.16.2.0.jar
rem For ReflectedParcelable
set CLASS_PATH=%CLASS_PATH%;%BDS_DEBUG_LIB%\com-google-android-gms.play-services-basement.16.2.0.jar

echo.
echo Checking environment variables

if not exist "%BDS%\" (
  echo Path used to set BDS environment variable does not exist^^! Is RAD Studio installed elsewhere?
  goto :Error
)

if not exist "%JAVA_PATH%\" (
  echo Path used to set JAVA_PATH environment variable does not exist^^! Is the JDK installed elsewhere?
  goto :Error
)

if not exist "%SDK_PATH%\" (
  echo Path used to set SDK_PATH environment variable does not exist^^! Is the Android SDK installed elsewhere?
  goto :Error
)

if not exist "%ANDROID_JAR%" (
  echo Path used to set ANDROID_JAR environment variable does not exist^^! Is your android.jar in a different platform folder?
  goto :Error
)

echo.
echo Changing to the FMX source folder
echo.

pushd %FMX_SRC_PATH%

echo Getting fully qualified list of all Java source file we need to rebuild
echo.

if not exist bin\classes mkdir bin\classes
if not exist bin\debug mkdir bin\debug
if not exist bin\release mkdir bin\release
dir src\android\bluetooth\*.java /s /b > JavaSources.txt
dir src\android\telephony\*.java /s /b >> JavaSources.txt
dir src\com\*.java /s /b >> JavaSources.txt

echo Ensuring FMX source path ends in a '\'
echo.

set LAST_CHAR=%FMX_SRC_PATH:~-1%
if not "%LAST_CHAR%"=="\" set FMX_SRC_PATH=%FMX_SRC_PATH%\

echo Making Java source file paths relative to current directory
echo.

if exist JavaSources2.txt del JavaSources2.txt
for /F "tokens=*" %%A in (JavaSources.txt) do (
  set STR=%%A
  set "STR=!STR:%FMX_SRC_PATH%=!"
  echo !STR!>>JavaSources2.txt
)

echo Compiling all the FMX Java code into class files with debug info
echo.

"%JAVA_PATH%"\javac -g -d bin\classes -classpath "%CLASS_PATH%" -encoding UTF-8 -g @JavaSources2.txt
if errorlevel 1 (
  echo.
  echo Problem encountered during Java compilation
  goto :Error
)

echo.
echo Creating jar containing the new compiled FMX Java classes with debug info
echo.

"%JAVA_PATH%"\jar cf bin\debug\fmx.jar -C bin\classes .
if errorlevel 1 (
  echo.
  echo Problem encountered during Java archiving
  goto :Error
)

echo Creating DEX jar containing the new compiled FMX Java classes with debug info
echo.

call %DX_PATH%\dx --dex --output=bin\debug\fmx.dex.jar --positions=lines bin\debug\fmx.jar
if errorlevel 1 (
  echo.
  echo Problem encountered during DEXing
  goto :Error
)

echo Compiling all the FMX Java code into class files without debug info
echo.

"%JAVA_PATH%"\javac -g:none -d bin\classes -classpath "%CLASS_PATH%" -encoding UTF-8 @JavaSources2.txt
if errorlevel 1 (
  echo.
  echo Problem encountered during Java compilation
  goto :Error
)

echo.
echo Creating jar containing the new compiled FMX Java classes without debug info
echo.

"%JAVA_PATH%"\jar cf bin\release\fmx.jar -C bin\classes .
if errorlevel 1 (
  echo.
  echo Problem encountered during Java archiving
  goto :Error
)

echo Creating DEX jar containing the new compiled FMX Java classes without debug info
echo.

call %DX_PATH%\dx --dex --output=bin\release\fmx.dex.jar --positions=lines bin\release\fmx.jar
if errorlevel 1 (
  echo.
  echo Problem encountered during DEXing
  goto :Error
)

copy bin\debug\* "%BDS_DEBUG_LIB%"
copy bin\release\* "%BDS_RELEASE_LIB%"

echo Tidying up...
echo.
if exist JavaSources.txt del JavaSources.txt
if exist JavaSources2.txt del JavaSources2.txt
rd /s /q bin

goto :End

:Error
echo.
echo Sorry, we had a problem :(
echo.

:End

echo Changing back to the folder we started in

popd

endlocal