How To Create A Single Native Shared Library With No Dependency For Android Using Qt Creator

I have created a shared library using Qt Creator and I have added the Android SDK, Android NDK and Android Qt kit. Then I compiled my library for Android successfully. I even teste

Solution 1:

By reading the compile output, I executed the following command manually and created my library with 1 MB size. And it works correctly.

/home/matin/Applications/android-ndk-r13b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++ --sysroot=/home/matin/Applications/android-ndk-r13b/platforms/android-9/arch-arm/ -Wl,--no-undefined -Wl,-z,noexecstack -shared -Wl,-soname,libMatinChess.so -o libMatinChess.so matinchessdll.o bishop.o piece.o board.o king.o memorymanager.o pawn.o queen.o blackpawn.o knight.o rook.o whitepawn.o squarelist.o game.o boardhistory.o -L/home/matin/Applications/android-ndk-r13b/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a -L/home/matin/Applications/android-ndk-r13b/platforms/android-9/arch-arm//usr/lib -lgnustl_static

But still I don't know how to automate this command in QMake

Solution 2:

Below script android.pri did help for me which I include in my projects to get rid of some QtCreator related bugs:

## this file changes many values set by "Qt/mkspec/android-g++/qmake.conf"## since the failed to work with newest Android SDK and/or NDK#### use below lines before including this file###ANDROID_API = 21#ANDROID_ARCH = armeabi-v7a#do you after using this have still problems?#there is an bug inside "QtCreator" (not inside "Gradle")#   that leads to .o and .so files get not found#solved: not required to change "QMAKE_LIBDIR" just open "AndroidManifest.xml"#   and change "Minimum required SDK" to "not set" save then restore to last#   value and save agian to force "QtCreator" update

isEmpty(ANDROID_API): ANDROID_API = 21
isEmpty(ANDROID_ARCH): ANDROID_ARCH = armeabi-v7a #ANDROID_TARGET_ARCH=armeabi-v7a#remove old values
CONFIG         -= $$ANDROID_PLATFORM
QMAKE_CFLAGS   -= --sysroot=$$ANDROID_PLATFORM_ROOT_PATH
QMAKE_CXXFLAGS -= --sysroot=$$ANDROID_PLATFORM_ROOT_PATH
QMAKE_LFLAGS   -= --sysroot=$$ANDROID_PLATFORM_ROOT_PATH#NDK Root directory
ANDROID_NDK_ROOT = $$(ANDROID_NDK_ROOT) #first try Environment variable
isEmpty(ANDROID_NDK_ROOT) | !exists($$ANDROID_NDK_ROOT) {
    ANDROID_NDK_ROOT = D:/android/sdk/ndk-bundle }
NDK_ROOT = $$ANDROID_NDK_ROOT#API Level
ANDROID_NDK_PLATFORM = android-$$ANDROID_API
ANDROID_PLATFORM = $$ANDROID_NDK_PLATFORM
CONFIG  += $$ANDROID_PLATFORM
DEFINES += __ANDROID_API__=$$ANDROID_API#Architecture
ANDROID_TARGET_ARCH = $$ANDROID_ARCH
equals(ANDROID_TARGET_ARCH, x86): ANDROID_ARCHITECTURE = x86
else: equals(ANDROID_TARGET_ARCH, x86_64): ANDROID_ARCHITECTURE = x86_64
else: equals(ANDROID_TARGET_ARCH, mips): ANDROID_ARCHITECTURE = mips
else: equals(ANDROID_TARGET_ARCH, mips64): ANDROID_ARCHITECTURE = mips64
else: equals(ANDROID_TARGET_ARCH, arm64-v8a): ANDROID_ARCHITECTURE = arm64
else: ANDROID_ARCHITECTURE = arm

#API Path
ANDROID_PLATFORM_ROOT_PATH  = $$NDK_ROOT/platforms/$$ANDROID_PLATFORM/arch-$$ANDROID_ARCHITECTURE/
ANDROID_PLATFORM_PATH  = $$ANDROID_PLATFORM_ROOT_PATH/usr
QMAKE_CFLAGS   += --sysroot=$$ANDROID_PLATFORM_ROOT_PATH
QMAKE_CXXFLAGS += --sysroot=$$ANDROID_PLATFORM_ROOT_PATH
QMAKE_LFLAGS   += --sysroot=$$ANDROID_PLATFORM_ROOT_PATH# used to compile platform plugins for android-4 and android-5
QMAKE_ANDROID_PLATFORM_INCDIR = $$NDK_ROOT/sysroot/usr/include #headers bundled
QMAKE_ANDROID_PLATFORM_LIBDIR = $$ANDROID_PLATFORM_PATH/lib #same as before

ANDROID_SOURCES_CXX_STL_LIBDIR = $$NDK_ROOT/sources/cxx-stl/gnu-libstdc++/$$NDK_TOOLCHAIN_VERSION/libs/$$ANDROID_TARGET_ARCH
ANDROID_SOURCES_CXX_STL_INCDIR = $$NDK_ROOT/sources/cxx-stl/gnu-libstdc++/$$NDK_TOOLCHAIN_VERSION/include $$ANDROID_SOURCES_CXX_STL_LIBDIR/include

equals(ANDROID_TARGET_ARCH, x86_64)|equals(ANDROID_TARGET_ARCH, mips64): \
    QMAKE_ANDROID_PLATFORM_LIBDIR = $${QMAKE_ANDROID_PLATFORM_LIBDIR}64

#additionl fix

QMAKE_CFLAGS += -Wno-attributes #ignore Android Macros
QMAKE_CFLAGS += \
    -Wno-unused-parameter \
    -Wno-unused-variable \
    -Wno-unused-but-set-variable \
    -Wno-unused-value \
    -Wno-unused-function

INCLUDEPATH += $$ANDROID_NDK_ROOT/sysroot/usr/include
INCLUDEPATH += $$ANDROID_NDK_ROOT/sysroot/usr/include/arm-linux-androideabi

## you most times need set "ANDROID_PACKAGE_SOURCE_DIR" manualys
isEmpty(ANDROID_PACKAGE_SOURCE_DIR) {
    DISTFILES += \
        $$PWD/res/android/AndroidManifest.xml \
        $$PWD/res/android/gradle/wrapper/gradle-wrapper.jar \
        $$PWD/res/android/gradlew \
        $$PWD/res/android/res/values/libs.xml \
        $$PWD/res/android/build.gradle \
        $$PWD/res/android/gradle/wrapper/gradle-wrapper.properties \
        $$PWD/res/android/gradlew.bat

    ANDROID_PACKAGE_SOURCE_DIR = $$PWD/res/android

    !build_pass:warning(no ANDROID_PACKAGE_SOURCE_DIR defaulted to $$ANDROID_PACKAGE_SOURCE_DIR)
}
#ANDROID_EXTRA_LIBS = $$PWD/libTest.so ## you may need#ANDROID_DEPLOYMENT_SETTINGS_FILE = $$PWD/android-settings.json ## no need ever#QML_IMPORT_PATH#QML_DESIGNER_IMPORT_PATH#QMAKE_PROJECT_NAME#isEmpty(ANDROID_PACKAGE_SOURCE_DIR) {#    # note that $$PWD/android/assets directory is "QFile::ReadOnly" on android#    android: varDirInstall.path =/assets#    else: varDirInstall.path =$$OUT_PWD##    varDirInstall.files = $$files($$PWD/android/assets)#    win32: varDirInstall.files ~= s|\\\\|/|g#    varDirInstall.depends += FORCE#    INSTALLS += varDirInstall#}

usage sample:

ANDROID_API = 21
ANDROID_ARCH = armeabi-v7a
include($$PWD/android.pri)

but I do get below error some times any way for TEMPLATE = app:

No Android arch set by the .pro file. Error while building/deploying project vpnAndroid (kit: Qt5_android_armeabi-v7a) When executing step "Deploy to Android device"

This special QtCreator related bug costs time to fix:

1. Close IDE and delete all the QtCreator setting files (in windows "C:\Users\Admin\UserName\Roaming\QtProject")
2. Start IDE again and reconfigure Android Paths, Compilers, Debugers and Kits in this order
3. Close IDE to save changes
4. Backup the folder mentioned before to save time see below:

the QtCreator plugins related to Android do store there failure in settings and so you need to backup since the plugins may do that again