Sqlite Android Qt drivers error

Avtansh Sharma

Hi,

Is there any way can create sqlite database through qt commands in Android.

Below is the error log

Starting remote process.I art : Late-enabling -Xcheck:jni
W System : ClassLoader referenced unknown path:
I QtCore : Start
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libQt5Gui.so: unsupported flags DT_FLAGS_1=0x81
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libQt5Widgets.so: unsupported flags DT_FLAGS_1=0x81
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libQt5Charts.so: unsupported flags DT_FLAGS_1=0x81
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libQt5AndroidExtras.so: unsupported flags DT_FLAGS_1=0x81
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libQt5Bluetooth.so: unsupported flags DT_FLAGS_1=0x81
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libQt5Sql.so: unsupported flags DT_FLAGS_1=0x81
W linker : /data/data/org.qtproject.example.splinechart/qt-reserved-files/plugins/platforms/android/libqtforandroid.so: unsupported flags DT_FLAGS_1=0x81
I Qt : qt start
I art : Do partial code cache collection, code=11KB, data=27KB
I art : After code cache collection, code=11KB, data=27KB
I art : Increasing code cache capacity to 128KB
W linker : /data/app/org.qtproject.example.splinechart-1/lib/arm/libsplinechart.so: unused DT entry: type 0xf arg 0x739a
W : (null):0 ((null)): QSqlDatabase: QSQLITE driver not loaded
W : (null):0 ((null)): QSqlDatabase: available drivers:
W : (null):0 ((null)): QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins
D : ../splinechart/devicedata.cpp:55 (DeviceData::DeviceData(QObject*)): Error: connection with database fail
W : (null):0 ((null)): QSqlDatabase: QSQLITE driver not loaded

jsulm

@Avtansh-Sharma It looks like you did not deploy SQLite driver together with your app. Try to set QT_DEBUG_PLUGINS variable before starting your app, you then will see more information about what is missing.

Avtansh Sharma

17:25:43: Running steps for project splinechart...
17:25:43: Configuration unchanged, skipping qmake step.
17:25:43: Starting: "/usr/bin/make"
make: Nothing to be done for 'first'.
17:25:43: The process "/usr/bin/make" exited normally.
17:25:43: Removing directory /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/assets
17:25:43: Removing directory /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/libs
17:25:43: Starting: "/usr/bin/make" INSTALL_ROOT=/home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build install
/home/user/Qt5.9.0/5.9/android_armv7/bin/qmake -install qinstall program libsplinechart.so /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/libs/armeabi-v7a/libsplinechart.so
17:25:44: The process "/usr/bin/make" exited normally.
17:25:44: Starting: "/home/user/Qt5.9.0/5.9/android_armv7/bin/androiddeployqt" --input /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-libsplinechart.so-deployment-settings.json --output /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build --deployment bundled --android-platform android-22 --jdk /home/user/Downloads/jdk1.8.0_131 --verbose --gradle
Generating Android Package
Input file: /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-libsplinechart.so-deployment-settings.json
Output directory: /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/
Application binary: /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/libsplinechart.so
Android build platform: android-22
Install to device: No
Delete missing files /home/user/Qt5.9.0/5.9/android_armv7/src/android/templates/res /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/res
Delete missing files /home/user/Qt5.9.0/5.9/android_armv7/src/android/templates/res/values /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/res/values
Copying Android package template.
-- Skipping file /home/user/Qt5.9.0/5.9/android_armv7/src/3rdparty/gradle/gradle/wrapper/gradle-wrapper.jar. Same or newer file already in place.
-- Skipping file /home/user/Qt5.9.0/5.9/android_armv7/src/3rdparty/gradle/gradle/wrapper/gradle-wrapper.properties. Same or newer file already in place.
-- Skipping file /home/user/Qt5.9.0/5.9/android_armv7/src/3rdparty/gradle/gradlew. Same or newer file already in place.
-- Skipping file /home/user/Qt5.9.0/5.9/android_armv7/src/3rdparty/gradle/gradlew.bat. Same or newer file already in place.
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/AndroidManifest.xml
-- Skipping file /home/user/Qt5.9.0/5.9/android_armv7/src/android/templates/build.gradle. Same or newer file already in place.
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/res/values/libs.xml
Detecting dependencies of application.
Reading dependencies from /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/libsplinechart.so
lib/libQt5Charts.so
lib/libQt5Widgets.so
lib/libQt5Gui.so
lib/libQt5Bluetooth.so
lib/libQt5Sql.so
lib/libQt5Core.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5Charts.so
lib/libQt5Widgets.so
lib/libQt5Gui.so
lib/libQt5Core.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5Widgets.so
lib/libQt5Gui.so
lib/libQt5Core.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5Gui.so
lib/libQt5Core.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5Core.so
Appending dependency: lib/libQt5Core.so
Reading Android dependencies for Qt5Core
Appending dependency: lib/libQt5Gui.so
Reading Android dependencies for Qt5Gui
Appending dependency from xml: plugins/platforms/android/libqtforandroid.so
Appending dependency from xml: plugins/iconengines/libqsvgicon.so
Appending dependency from xml: plugins/imageformats/libqgif.so
Appending dependency from xml: plugins/imageformats/libqicns.so
Appending dependency from xml: plugins/imageformats/libqico.so
Appending dependency from xml: plugins/imageformats/libqjpeg.so
Appending dependency from xml: plugins/imageformats/libqsvg.so
Appending dependency from xml: plugins/imageformats/libqtga.so
Appending dependency from xml: plugins/imageformats/libqtiff.so
Appending dependency from xml: plugins/imageformats/libqwbmp.so
Appending dependency from xml: plugins/imageformats/libqwebp.so
Appending dependency: lib/libQt5Widgets.so
Reading Android dependencies for Qt5Widgets
Appending dependency: lib/libQt5Charts.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5Bluetooth.so
lib/libQt5Core.so
lib/libQt5AndroidExtras.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5AndroidExtras.so
lib/libQt5Core.so
Appending dependency: lib/libQt5AndroidExtras.so
No android dependencies for Qt5AndroidExtras
Appending dependency: lib/libQt5Bluetooth.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/lib/libQt5Sql.so
lib/libQt5Core.so
Appending dependency: lib/libQt5Sql.so
No android dependencies for Qt5Charts
Reading Android dependencies for Qt5Bluetooth
Reading Android dependencies for Qt5Sql
Appending dependency from xml: plugins/sqldrivers/libqsqlite.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/plugins/platforms/android/libqtforandroid.so
lib/libQt5Gui.so
lib/libQt5Core.so
Reading dependencies from /home/user/Qt5.9.0/5.9/android_armv7/plugins/platforms/android/libqtforandroid.so
lib/libQt5Gui.so
lib/libQt5Core.so
Scanning for QML imports.
Copying GNU STL library
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libgnustl_shared.so
Copying 21 dependencies from Qt into package.
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5Core.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/QtAndroid-bundled.jar
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5Gui.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_platforms_android_libqtforandroid.so
-- Skipping /home/user/Qt5.9.0/5.9/android_armv7/plugins/iconengines/libqsvgicon.so. It has unmet dependencies: lib/libQt5Svg.so.
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqgif.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqicns.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqico.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqjpeg.so
-- Skipping /home/user/Qt5.9.0/5.9/android_armv7/plugins/imageformats/libqsvg.so. It has unmet dependencies: lib/libQt5Svg.so.
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqtga.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqtiff.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqwbmp.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_imageformats_libqwebp.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5Widgets.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5Charts.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5AndroidExtras.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5Bluetooth.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libQt5Sql.so
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/QtAndroidBluetooth-bundled.jar
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libplugins_sqldrivers_libqsqlite.so
Checking if application binary is in package.
Copying gdbserver into package.
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/gdbserver
-- Copied /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//libs/armeabi-v7a/libgdbserver.so
Stripping libraries to minimize size.
Updating Android package files with project settings.
-- res/values/libs.xml
-- AndroidManifest.xml
Pregenerating entry list for assets file engine.
Initialized native services in: /home/user/.gradle/native
Creating new cache for fileHashes, path /home/user/.gradle/caches/3.4/fileHashes/fileHashes.bin, access org.gradle.cache.internal.DefaultCacheAccess@7c214cc0
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Creating new cache for client-status, path /home/user/.gradle/caches/3.4/plugin-resolution/client-status.bin, access org.gradle.cache.internal.DefaultCacheAccess@25bfcafd
Starting Build
Settings evaluated using settings file '/master/settings.gradle'.
Projects loaded. Root project using build file '/home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/build.gradle'.
Included projects: [root project 'android-build']
Evaluating root project 'android-build' using build file '/home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/build.gradle'.
Creating new cache for metadata-2.23/module-metadata, path /home/user/.gradle/caches/modules-2/metadata-2.23/module-metadata.bin, access org.gradle.cache.internal.DefaultCacheAccess@612e21b9
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Using 4 worker leases.
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Parsing the SDK, no caching allowed
Parsing /home/user/Downloads/AndroidSdk/build-tools/26.0.0/package.xml
Parsing /home/user/Downloads/AndroidSdk/platform-tools/package.xml
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The JavaCompile.setDependencyCacheDir() method has been deprecated and is scheduled to be removed in Gradle 4.0.
Using incremental javac compilation.
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The TaskInputs.source(Object) method has been deprecated and is scheduled to be removed in Gradle 4.0. Please use TaskInputs.file(Object).skipWhenEmpty() instead.
Using incremental javac compilation.
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All projects evaluated.
Selected primary task 'assembleDebug' from project :
Creating new cache for fileHashes, path /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/.gradle/3.4/taskHistory/fileHashes.bin, access org.gradle.cache.internal.DefaultCacheAccess@2c2aab92
Creating new cache for annotation-processors, path /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/.gradle/3.4/fileContent/annotation-processors.bin, access org.gradle.cache.internal.DefaultCacheAccess@7573c7b5
Tasks to be executed: [task ':preBuild', task ':preDebugBuild', task ':checkDebugManifest', task ':prepareDebugDependencies', task ':compileDebugAidl', task ':compileDebugRenderscript', task ':generateDebugBuildConfig', task ':generateDebugResValues', task ':generateDebugResources', task ':mergeDebugResources', task ':processDebugManifest', task ':processDebugResources', task ':generateDebugSources', task ':incrementalDebugJavaCompilationSafeguard', task ':compileDebugJavaWithJavac', task ':compileDebugNdk', task ':compileDebugSources', task ':mergeDebugShaders', task ':compileDebugShaders', task ':generateDebugAssets', task ':mergeDebugAssets', task ':transformClassesWithDexForDebug', task ':mergeDebugJniLibFolders', task ':transformNative_libsWithMergeJniLibsForDebug', task ':processDebugJavaRes', task ':transformResourcesWithMergeJavaResForDebug', task ':validateSigningDebug', task ':packageDebug', task ':assembleDebug']
Creating new cache for jvmClassSignatures, path /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/.gradle/3.4/taskHistory/jvmClassSignatures.bin, access org.gradle.cache.internal.DefaultCacheAccess@2c2aab92
Creating new cache for fileSnapshots, path /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/.gradle/3.4/taskHistory/fileSnapshots.bin, access org.gradle.cache.internal.DefaultCacheAccess@2c2aab92
Creating new cache for taskHistory, path /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/.gradle/3.4/taskHistory/taskHistory.bin, access org.gradle.cache.internal.DefaultCacheAccess@2c2aab92
:preBuild (Thread[main,5,main]) started.
:preBuild
Skipping task ':preBuild' as it has no actions.
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:compileDebugAidl (Thread[main,5,main]) started.
:compileDebugAidl
Putting task artifact state for task ':compileDebugAidl' into context took 0.022 secs.
Task :compileDebugAidl class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :compileDebugAidl actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Task :compileDebugRenderscript class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :compileDebugRenderscript actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Task :generateDebugBuildConfig class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :generateDebugBuildConfig actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Task :generateDebugResValues class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :generateDebugResValues actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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:generateDebugResources
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:mergeDebugResources
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Task :mergeDebugResources class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :mergeDebugResources actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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:processDebugManifest
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Task :processDebugManifest class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :processDebugManifest actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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:processDebugResources
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Task :processDebugResources class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :processDebugResources actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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:generateDebugSources
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:incrementalDebugJavaCompilationSafeguard
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Task :incrementalDebugJavaCompilationSafeguard class loader hash: a0499cbeba26109b195ac965bbe1e21d
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:compileDebugJavaWithJavac
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Task :compileDebugJavaWithJavac class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :compileDebugJavaWithJavac actions class loader hash: 7f22aa878479725b3a3df2c1e32a33f7
file or directory '/home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/src', not found
file or directory '/home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/java', not found
file or directory '/home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build/src/debug/java', not found
Skipping task ':compileDebugJavaWithJavac' as it is up-to-date (took 0.061 secs).
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:compileDebugNdk (Thread[main,5,main]) started.
:compileDebugNdk
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:compileDebugNdk NO-SOURCE
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:compileDebugSources
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Task :compileDebugShaders actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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:generateDebugAssets
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:mergeDebugAssets
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Task :mergeDebugAssets class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :mergeDebugAssets actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Task :transformClassesWithDexForDebug actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Task :mergeDebugJniLibFolders class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :mergeDebugJniLibFolders actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Task :transformNative_libsWithMergeJniLibsForDebug class loader hash: a0499cbeba26109b195ac965bbe1e21d
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:processDebugJavaRes
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Task :transformResourcesWithMergeJavaResForDebug class loader hash: a0499cbeba26109b195ac965bbe1e21d
Task :transformResourcesWithMergeJavaResForDebug actions class loader hash: e7c2457542b1c563028e7c8e5bda47f9
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Executing task ':validateSigningDebug' (up-to-date check took 0.0 secs) due to:
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Task :packageDebug class loader hash: a0499cbeba26109b195ac965bbe1e21d
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BUILD SUCCESSFUL

Total time: 6.152 secs
Stopped 0 worker daemon(s).
Android package built successfully in 6.449 ms.
-- File: /home/user/Downloads/build-splinechart-Android_for_armeabi_v7a_GCC_4_9_Qt_5_9_0_for_Android_armv7-Debug/android-build//build/outputs/apk/android-build-debug.apk
17:25:50: The process "/home/user/Qt5.9.0/5.9/android_armv7/bin/androiddeployqt" exited normally.
17:25:50: Elapsed time: 00:07.

jsulm

@Avtansh-Sharma "QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins" - do you try to connect to the DB before creating QApplication instance?

Avtansh Sharma

This post is deleted!

Avtansh Sharma

Here is the code
I am using QApplication not QCoreApplication

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

DeviceData obj_DeviceData; ///does the database work
obj_DeviceData.syncDevice(true);

QMainWindow window;
ThemeWidget *widget = new ThemeWidget();
window.setCentralWidget(widget);

window.resize(900, 600);
window.show();
return a.exec();

}

jsulm

@Avtansh-Sharma Do you have any static variables which are accessing the database?

Avtansh Sharma

No there is no static variable

Avtansh Sharma

@jsulm

Here is the constructor

DeviceData::DeviceData(QObject *parent)
: QObject(parent), m_bluetoothSocket(0)
{

try
{
m_bterminate=false;
m_db = QSqlDatabase::addDatabase("QSQLITE");

//m_db.setDatabaseName("/home/user/db_Health.db");

QString basePath = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation)[1];
m_db.setDatabaseName(basePath+"/db_Health.db");
if (!m_db.open())
{
    qDebug() << "Error: connection with database fail";

}

m_db is member variable

jsulm

@Avtansh-Sharma "Ok. I will change that however it worked fine on Ubuntu desktop app. maybe a reinitializition woul have happened in desktop app" - after changing what errors do you get now?

Avtansh Sharma

Errors is that the sqlite driver is missing on Android

W : (null):0 ((null)): QSqlDatabase: QSQLITE driver not loaded

this error still comes. I have tried use QStandardPaths. Still there is an error

jsulm

@Avtansh-Sharma In my first answer I suggested this: "Try to set QT_DEBUG_PLUGINS variable before starting your app, you then will see more information about what is missing."
Did you try this?
And please post all error messages not just that one line.

Avtansh Sharma

@jsulm Please check above in thread . I have posted atleast 200-300 lines of compile and debug inof using debug flag