when i run a qt app on android,it's crashed.because app can not find a native function:startQtApp.I find it in libQtAndroidMain.a,but I don't know how to link it to my applicaiont.

this is logcat: W/dalvikvm( 1514): No implementation found for native Lcom/nokia/qt/android/QtApplication;.startQtApp (Ljava/lang/Object;)V D/AndroidRuntime( 1514): Shutting down VM W/dalvikvm( 1514): threadid=1: thread exiting with uncaught exception (group=0x4001d7e0) E/AndroidRuntime( 1514): FATAL EXCEPTION: main E/AndroidRuntime( 1514): java.lang.UnsatisfiedLinkError: startQtApp E/AndroidRuntime( 1514): at com.nokia.qt.android.QtApplication.startQtApp(Native Method) E/AndroidRuntime( 1514): at com.nokia.qt.android.QtApplication.startApplication(QtApplication.java:238) E/AndroidRuntime( 1514): at com.nokia.qt.android.QtActivity.onCreate(QtActivity.java:248) E/AndroidRuntime( 1514): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) E/AndroidRuntime( 1514): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) E/AndroidRuntime( 1514): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) E/AndroidRuntime( 1514): at android.app.ActivityThread.access$2300(ActivityThread.java:125) E/AndroidRuntime( 1514): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) E/AndroidRuntime( 1514): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime( 1514): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime( 1514): at android.app.ActivityThread.main(ActivityThread.java:4627) E/AndroidRuntime( 1514): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 1514): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime( 1514): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) E/AndroidRuntime( 1514): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) E/AndroidRuntime( 1514): at dalvik.system.NativeStart.main(Native Method) W/ActivityManager( 795): Force finishing activity org.myqtapp.qt/.QtMain W/ActivityManager( 795): Activity pause timeout for HistoryRecord{43b93d48 org.myqtapp.qt/.QtMain} I/Process ( 1514): Sending signal. PID: 1514 SIG: 9 I/ActivityManager( 795): Process org.myqtapp.qt (pid 1514) has died. W/InputManagerService( 795): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@43a8c698 D/dalvikvm( 983): GC_EXPLICIT freed 34 objects / 1224 bytes in 24ms

I have meet the same issue. I used android official NDK r5 to compile android-lighthouse and example code, and target runs on android 2.2. The following is the logcat output:

D/AndroidRuntime( 358): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< D/AndroidRuntime( 358): CheckJNI is ON D/AndroidRuntime( 358): --- registering native functions --- I/ActivityManager( 60): Starting activity: Intent { flg=0x10000000 cmp=org.anim.qt/.QtMain } D/AndroidRuntime( 358): Shutting down VM D/jdwp ( 358): adbd disconnected I/AndroidRuntime( 358): NOTE: attach of thread 'Binder Thread #3' failed I/ActivityManager( 60): Start proc org.anim.qt for activity org.anim.qt/.QtMain: pid=365 uid=10040 gids={1015} E/Qt JAVA ( 365): Can't create main activity E/Qt JAVA ( 365): java.lang.NullPointerException E/Qt JAVA ( 365): at com.nokia.qt.android.QtActivity.onCreate(QtActivity.java:208) E/Qt JAVA ( 365): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) E/Qt JAVA ( 365): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) E/Qt JAVA ( 365): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) E/Qt JAVA ( 365): at android.app.ActivityThread.access$2300(ActivityThread.java:125) E/Qt JAVA ( 365): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) E/Qt JAVA ( 365): at android.os.Handler.dispatchMessage(Handler.java:99) E/Qt JAVA ( 365): at android.os.Looper.loop(Looper.java:123) E/Qt JAVA ( 365): at android.app.ActivityThread.main(ActivityThread.java:4627) E/Qt JAVA ( 365): at java.lang.reflect.Method.invokeNative(Native Method) E/Qt JAVA ( 365): at java.lang.reflect.Method.invoke(Method.java:521) E/Qt JAVA ( 365): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) E/Qt JAVA ( 365): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) E/Qt JAVA ( 365): at dalvik.system.NativeStart.main(Native Method) I/Qt JAVA ( 365): onResume W/dalvikvm( 365): No implementation found for native Lcom/nokia/qt/android/QtApplication;.resumeQtApp ()V D/AndroidRuntime( 365): Shutting down VM W/dalvikvm( 365): threadid=1: thread exiting with uncaught exception (group=0x4001d800) E/AndroidRuntime( 365): FATAL EXCEPTION: main E/AndroidRuntime( 365): java.lang.UnsatisfiedLinkError: resumeQtApp E/AndroidRuntime( 365): at com.nokia.qt.android.QtApplication.resumeQtApp(Native Method) E/AndroidRuntime( 365): at com.nokia.qt.android.QtActivity.onResume(QtActivity.java:274) E/AndroidRuntime( 365): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1149) E/AndroidRuntime( 365): at android.app.Activity.performResume(Activity.java:3823) E/AndroidRuntime( 365): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3118) E/AndroidRuntime( 365): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3143) E/AndroidRuntime( 365): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2684) E/AndroidRuntime( 365): at android.app.ActivityThread.access$2300(ActivityThread.java:125) E/AndroidRuntime( 365): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) E/AndroidRuntime( 365): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime( 365): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime( 365): at android.app.ActivityThread.main(ActivityThread.java:4627) E/AndroidRuntime( 365): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 365): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime( 365): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) E/AndroidRuntime( 365): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) E/AndroidRuntime( 365): at dalvik.system.NativeStart.main(Native Method) W/ActivityManager( 60): Force finishing activity org.anim.qt/.QtMain W/ActivityManager( 60): Activity pause timeout for HistoryRecord{43f80a78 org.anim.qt/.QtMain} W/ActivityManager( 60): Activity destroy timeout for HistoryRecord{43f80a78 org.anim.qt/.QtMain} D/SntpClient( 60): request time failed: java.net.SocketException: Address family not supported by protocol

I got a solutin: remove the following lines from you .pro file: TEMPLATE = app android-g++ { TEMPLATE = lib CONFIG += dll }

I found the solution.

I used the shell script "create_android_lighthouse_project.sh" to create java code, but something missed in created AndroidManifest.xml, In my case, "qt_lib_resource_id" and so on is not given in AndroidManifest.xml, so exception happens when creating activity.

The problem solved by replace myproj-java/AndroidManifest.xml with src/android/java/AndroidManifest.xml.

I'm also experiencing the same problems.

I tried the solution with using src/android/java/AndroidManifers.xml, but then I got Java compilation errors.

It seems that Java cannot find the newly added resources. Does anyone have any idea how to resolve this?

/data/local/qt/bin/uic mainwindow.ui -o ui_mainwindow.h /usr/local/android-ndk-r5/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -c -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -fpic -mthumb -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -DANDROID -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DQT_NO_QWS_TRANSFORMED -Os -g -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -Wall -W -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I../../android-lighthouse/mkspecs/android-g++ -I. -I../../android-lighthouse/include/QtCore -I../../android-lighthouse/include/QtNetwork -I../../android-lighthouse/include/QtGui -I../../android-lighthouse/include -I. -I. -I/usr/local/android-ndk-r5/platforms/android-8/arch-arm/usr/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/libs/armeabi/include -o main.o main.cpp /usr/local/android-ndk-r5/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -c -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -fpic -mthumb -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -DANDROID -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DQT_NO_QWS_TRANSFORMED -Os -g -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -Wall -W -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I../../android-lighthouse/mkspecs/android-g++ -I. -I../../android-lighthouse/include/QtCore -I../../android-lighthouse/include/QtNetwork -I../../android-lighthouse/include/QtGui -I../../android-lighthouse/include -I. -I. -I/usr/local/android-ndk-r5/platforms/android-8/arch-arm/usr/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/libs/armeabi/include -o mainwindow.o mainwindow.cpp /data/local/qt/bin/moc -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I../../android-lighthouse/mkspecs/android-g++ -I. -I../../android-lighthouse/include/QtCore -I../../android-lighthouse/include/QtNetwork -I../../android-lighthouse/include/QtGui -I../../android-lighthouse/include -I. -I. -I/usr/local/android-ndk-r5/platforms/android-8/arch-arm/usr/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/libs/armeabi/include mainwindow.h -o moc_mainwindow.cpp /usr/local/android-ndk-r5/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -c -Wno-psabi -march=armv5te -mtune=xscale -msoft-float -fpic -mthumb -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -DANDROID -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DQT_NO_QWS_TRANSFORMED -Os -g -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -Wall -W -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I../../android-lighthouse/mkspecs/android-g++ -I. -I../../android-lighthouse/include/QtCore -I../../android-lighthouse/include/QtNetwork -I../../android-lighthouse/include/QtGui -I../../android-lighthouse/include -I. -I. -I/usr/local/android-ndk-r5/platforms/android-8/arch-arm/usr/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/include -I../../android-ndk-r5/sources/cxx-stl/gnu-libstdc++/libs/armeabi/include -o moc_mainwindow.o moc_mainwindow.cpp rm -f libQtTest6.so.1.0.0 libQtTest6.so libQtTest6.so.1 libQtTest6.so.1.0 /usr/local/android-ndk-r5/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ --sysroot=/usr/local/android-ndk-r5/platforms/android-8/arch-arm/ -L/usr/local/android-ndk-r5/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.4.3 -Wl,-rpath-link=/usr/local/android-ndk-r5/platforms/android-8/arch-arm//usr/lib -Wl,-O1 -Wl,-rpath=/data/local/qt/lib -Wl,-rpath=/data/local/lib -Wl,-rpath=/system/lib/data/local/qt/lib -Wl,--no-undefined -Wl,-z,noexecstack -shared -o libQtTest6.so.1.0.0 main.o mainwindow.o moc_mainwindow.o -L/usr/local/android-ndk-r5/sources/cxx-stl/gnu-libstdc++/libs/armeabi -L/usr/local/android-ndk-r5/platforms/android-8/arch-arm//usr/lib -L/data/local/qt/lib -lQtGui -L/home/vmplanet/tc/android-lighthouse/src/3rdparty/android/precompiled/android-5/arch-arm/lib -L/home/vmplanet/tc/android-lighthouse/lib -L/usr/local/android-ndk-r5/sources/cxx-stl/gnu-libstdc++/libs/armeabi -L/usr/local/android-ndk-r5/platforms/android-5/arch-arm//usr/lib -lQtNetwork -lQtCore -lstdc++ -lsupc++ -llog -lz -lm -ldl -lc -lgcc
ln -s libQtTest6.so.1.0.0 libQtTest6.so ln -s libQtTest6.so.1.0.0 libQtTest6.so.1 ln -s libQtTest6.so.1.0.0 libQtTest6.so.1.0 Buildfile: /home/vmplanet/tc/QtTest6/QtTest6-java/build.xml [setup] Android SDK Tools Revision 8 [setup] Project Target: Android 2.1-update1 [setup] API level: 7 [setup] [setup] ------------------ [setup] Resolving library dependencies: [setup] No library dependencies. [setup] [setup] ------------------ [setup] [setup] WARNING: No minSdkVersion value set. Application will install on all Android versions. [setup] [setup] Importing rules file: tools/ant/main_rules.xml

-debug-obfuscation-check:

-set-debug-mode:

-compile-tested-if-test:

-dirs: [echo] Creating output directories if needed... [mkdir] Created dir: /home/vmplanet/tc/QtTest6/QtTest6-java/gen [mkdir] Created dir: /home/vmplanet/tc/QtTest6/QtTest6-java/bin/classes

-pre-build:

-resource-src: [echo] Generating R.java / Manifest.java from the resources... [null] /home/vmplanet/tc/QtTest6/QtTest6-java/AndroidManifest.xml:14: error: Error: No resource found that matches the given name (at 'resource' with value '@array/pre_qt_bundled_libs'). [null] /home/vmplanet/tc/QtTest6/QtTest6-java/AndroidManifest.xml:16: error: Error: No resource found that matches the given name (at 'resource' with value '@array/qt_libs'). [null] /home/vmplanet/tc/QtTest6/QtTest6-java/AndroidManifest.xml:18: error: Error: No resource found that matches the given name (at 'resource' with value '@array/post_qt_bundled_libs').

BUILD FAILED /home/vmplanet/tc/android-sdk-linux_86/tools/ant/main_rules.xml:306: null returned: 1

Total time: 1 second Ant failed

Please use the latest SDK (http://sourceforge.net/projects/necessitas/files/).

Thank you.