use Java code in Qt prolem of compilation

ENSAO_CHEIKH

Hi All,

I try o import java code in Qt, but I het error in compilation, I don't know in the .pro file wich code I put, espicially with ANDROID_PACKAGE_SOURCE_DIR = ?

which file I put in this Macro ANDROID_PACKAGE_SOURCE_DIR, when I delete it the program comiles but the java code doesn't works, Thanks in adavnce

H

SGaist

Hi,

Did you follow Qt's documentation about it ?

ENSAO_CHEIKH

Hello Mr @SGaist ,while using JNI I am faced a problem which is figured below,

Please any suggestion regarding this problem?

SGaist

Based on the error message, are you using an unusual charset somewhere ?

ENSAO_CHEIKH

I don't change anything I follow projects>> Android APK>> create template, then a java directories are created, so I attempt to create a java class to do a simple tak, I've otten this problem

ENSAO_CHEIKH

Mr @SGaist here is below my simple code

SGaist

Can you provide the full error ?

ENSAO_CHEIKH

here is the full error shown in the image below:

SGaist

Did you check your file encoding ?

ENSAO_CHEIKH

which file? gradlew.bat file??

ENSAO_CHEIKH

@SGaist

@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem  Gradle startup script for Windows
@rem
@rem ##########################################################################

@rem Set local scope for the variables with windows NT shell

if "%OS%"=="Windows_NT" setlocal

set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%


@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS=

@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome

set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init

echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.

goto fail

:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe

if exist "%JAVA_EXE%" goto init

echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.

goto fail

:init
@rem Get command-line arguments, handling Windows variants

if not "%OS%" == "Windows_NT" goto win9xME_args

:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2

:win9xME_args_slurp
if "x%~1" == "x" goto execute

set CMD_LINE_ARGS=%*

:execute
@rem Setup the command line

set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar

@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%

:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd

:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1

:mainEnd
if "%OS%"=="Windows_NT" endlocal

:omega

ENSAO_CHEIKH

Mr @SGaist please any idea? this problem persist one week, i am still blocked with my app

SGaist

I'd start with a default project and ensure that it builds and run properly, then add the Java parts from scratch using new files.

ENSAO_CHEIKH

Here you could find my file .pro

QT += quick
QT += quickcontrols2
QT += network
QT += bluetooth
QT += core
QT += androidextras



CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Refer to the documentation for the
# deprecated API to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0




SOURCES += \
        bluetooth.cpp \
        main.cpp \
        wificonnection.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =







# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

HEADERS += \
    bluetooth.h \
    wificonnection.h

DISTFILES += \
    android/AndroidManifest.xml \
    android/build.gradle \
    android/gradle/wrapper/gradle-wrapper.jar \
    android/gradle/wrapper/gradle-wrapper.properties \
    android/gradlew \
    android/gradlew.bat \
    android/res/values/libs.xml \
    android/src/org/JavaClass/JavaClass.java

ANDROID_PACKAGE_SOURCE_DIR = $$PWD/android

ENSAO_CHEIKH

here is all the issue :

Warning: QML import could not be resolved in any of the import paths: QtQuick.Extras.Private.CppUtils
Warning: QML import could not be resolved in any of the import paths: QtQuick.Extras.Private.CppUtils
Starting a Gradle Daemon, 2 incompatible Daemons could not be reused, use --status for details

FAILURE: Build failed with an exception.

* What went wrong:
Unable to start the daemon process.
This problem might be caused by incorrect configuration of the daemon.
For example, an unrecognized jvm option is used.
Please refer to the User Manual chapter on the daemon at https://docs.gradle.org/5.6.4/userguide/gradle_daemon.html
Process command line: C:\Program Files\Java\jdk1.8.0_271\bin\java.exe -Xmx2048m -Dfile.encoding -Duser.country=FR -Duser.language=fr -Duser.variant -cp C:\Users\achraf\.gradle\wrapper\dists\gradle-5.6.4-bin\bxirm19lnfz6nurbatndyydux\gradle-5.6.4\lib\gradle-launcher-5.6.4.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 5.6.4
Please read the following process output to find out more:
-----------------------
Error occurred during initialization of VM
java.nio.charset.IllegalCharsetNameException: 
	at java.nio.charset.Charset.checkName(Charset.java:303)
	at java.nio.charset.Charset.lookup2(Charset.java:484)
	at java.nio.charset.Charset.lookup(Charset.java:464)
	at java.nio.charset.Charset.defaultCharset(Charset.java:609)
	at sun.nio.cs.StreamEncoder.forOutputStreamWriter(StreamEncoder.java:56)
	at java.io.OutputStreamWriter.<init>(OutputStreamWriter.java:111)
	at java.io.PrintStream.<init>(PrintStream.java:104)
	at java.io.PrintStream.<init>(PrintStream.java:151)
	at java.lang.System.newPrintStream(System.java:1148)
	at java.lang.System.initializeSystemClass(System.java:1192)


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org
Building the android package failed!
  -- For more information, run this command with --verbose.
12:42:30: Le processus "D:\Qt\5.15.2\android\bin\androiddeployqt.exe" s'est terminé avec le code 14.
Erreur lors de la compilation/déploiement du projet untitled2 (kit : Android for armeabi-v7a,arm64-v8a,x86,x86_64 (Clang Qt 5.15.2 for Android))
When executing step "Build Android APK"
12:42:30: Elapsed time: 00:23.

SGaist

Looks wrong:
@ENSAO_CHEIKH said in use Java code in Qt prolem of compilation:

-Dfile.encoding

there should be a value there.

ENSAO_CHEIKH

@SGaist pkease in which file I find this -Dfile.encoding, I dont see it ?

ENSAO_CHEIKH

@SGaist please where can I put this -Dfile encoding?

SGaist

Please show some patience and allow at least 24 hours to pass before bumping your own thread. This is a voluntary driven forum and people may not live in the same time zone as you.

I currently do not have a Windows machine at hand to check your issue.

That said:

did you try to apply my suggestion to start from a default project and once it's built, add the Java part ?
did you check your gradle related files for encoding entries ?