Android Question LibGDX conflict

[danijel]

Hi, I want to implement LibGDX in my existing app and getting errors.
I made an example app to show my problems.

Without LibGDX everyting is ok.



At the moment i click on LibGDX in my Libraries Manager and Run in Release mode


Nothing works anymore:


if I comment Image loading then error is somewhere else


and so on.
Everything becomes null object ref.

What is going on and how to resolve this?

 

[DonManfred]

Post errors as TEXT, not images.

 

[danijel]

Post errors as TEXT, not images.

Sorry about that.

Logs:

*** Service (starter) Create ***
** Service (starter) Start **
main_globals (java line: 407)
java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.libgdxexample-1/base.apk"],nativeLibraryDirectories=[/data/app/com.libgdxexample-1/lib/arm64, /data/app/com.libgdxexample-1/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64, /system/vendor/lib64, /product/lib64]]] couldn't find "libopenslplayer.so"
at java.lang.Runtime.loadLibrary0(Runtime.java:989)
at java.lang.System.loadLibrary(System.java:1533)
at flm.b4a.openslplayer.OpenSLSoundPlayer.<clinit>(OpenSLSoundPlayer.java:25)
at com.libgdxexample.main._globals(main.java:407)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:191)
at com.libgdxexample.main.initializeGlobals(main.java:320)
at com.libgdxexample.main.afterFirstLayout(main.java:101)
at com.libgdxexample.main.access$000(main.java:17)
at com.libgdxexample.main$WaitForLayout.run(main.java:82)
at android.os.Handler.handleCallback(Handler.java:761)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
Error (Exception) java.lang.Exception: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.libgdxexample-1/base.apk"],nativeLibraryDirectories=[/data/app/com.libgdxexample-1/lib/arm64, /data/app/com.libgdxexample-1/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64, /system/vendor/lib64, /product/lib64]]] couldn't find "libopenslplayer.so"
StackTrace java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.libgdxexample-1/base.apk"],nativeLibraryDirectories=[/data/app/com.libgdxexample-1/lib/arm64, /data/app/com.libgdxexample-1/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64, /system/vendor/lib64, /product/lib64]]] couldn't find "libopenslplayer.so"
at java.lang.Runtime.loadLibrary0(Runtime.java:989)
at java.lang.System.loadLibrary(System.java:1533)
at flm.b4a.openslplayer.OpenSLSoundPlayer.<clinit>(OpenSLSoundPlayer.java:25)
at com.libgdxexample.main._globals(main.java:407)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:191)
at com.libgdxexample.main.initializeGlobals(main.java:320)
at com.libgdxexample.main.afterFirstLayout(main.java:101)
at com.libgdxexample.main.access$000(main.java:17)
at com.libgdxexample.main$WaitForLayout.run(main.java:82)
at android.os.Handler.handleCallback(Handler.java:761)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
** Activity (main) Create, isFirst = true **
Dim IU
Init BMP1
main_activity_create (java line: 363)
java.lang.NullPointerException: Attempt to invoke virtual method 'void flm.b4a.openslplayer.OpenSLSoundPlayer.Initialize(int, boolean)' on a null object reference
at com.libgdxexample.main._activity_create(main.java:363)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:191)
at com.libgdxexample.main.afterFirstLayout(main.java:104)
at com.libgdxexample.main.access$000(main.java:17)
at com.libgdxexample.main$WaitForLayout.run(main.java:82)
at android.os.Handler.handleCallback(Handler.java:761)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
Error (NullPointerException) java.lang.NullPointerException: Attempt to invoke virtual method 'void flm.b4a.openslplayer.OpenSLSoundPlayer.Initialize(int, boolean)' on a null object reference
StackTrace java.lang.NullPointerException: Attempt to invoke virtual method 'void flm.b4a.openslplayer.OpenSLSoundPlayer.Initialize(int, boolean)' on a null object reference
at com.libgdxexample.main._activity_create(main.java:363)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:191)
at com.libgdxexample.main.afterFirstLayout(main.java:104)
at com.libgdxexample.main.access$000(main.java:17)
at com.libgdxexample.main$WaitForLayout.run(main.java:82)
at android.os.Handler.handleCallback(Handler.java:761)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
** Activity (main) Resume **

 

[Erel]

Are you testing it on a real device? It fails to load the native (C++) library.

 

[danijel]

Yes Erel,

It have been tested on 4 different real device:
HUAWEI VNS-L21, ARM64-v8a (64-bit) - (FAILS)
LGE LG-H815, ARM64-v8a (64-bit) - (FAILS)
HTC Desire 601, armeabi-v7a (32-bit) - (WORKS)
Prestigio PMP5770D, armeabi-v7a, armeabi (32-bit) - (WORKS)

and BlueStacks Android Emulator:
SAMSUNG-SM-N900A x86, armeabi-v7a (32-bit) - (WORKS)

My conclusion is that the conflict is generated on 64-bit devices and fails to load .so library
After research I found this:
https://stackoverflow.com/questions...es-on-64-bit-android-device/30799825#30799825

If so, is there way to workaround this and force 32-bit native libraries on 64-bit Android device using B4A.

 

[Erel]

Open the compiled APK with 7zip or a similar tool. Which folders and files do you see inside the lib folder?

BTW, you should test XUI2D.

 

[danijel]

libopenslplayer.so is missing from folders:

\lib\arm64-v8a

• libgdx.so
• libgdx-box2d.so
• libgdx-freetype.so

\lib\armeabi

• libgdx.so
• libgdx-box2d.so
• libgdx-freetype.so
• libopenslplayer.so

\lib\armeabi-v7a

• libgdx.so
• libgdx-box2d.so
• libgdx-freetype.so
• libopenslplayer.so

\lib\x86

• libgdx.so
• libgdx-box2d.so
• libgdx-freetype.so

\lib\x86_64

• libgdx.so
• libgdx-box2d.so
• libgdx-freetype.so

Basically I just need some good graphics library to rotate 1 image (wheel) at constant rate of 60 FPS.
I tried GameView Lib with timer but that wasn't so smooth on all devices.

Then I moved to LibGDX and animation is great but having conflict with other libraries.
So you are saying its easier to move on XUI2D than try to fix this conflict?

 

[Erel]

I tried GameView Lib with timer but that wasn't so smooth on all devices.

GameView is no longer relevant.

XUI2D is a good option. It is also cross platform.

About the error, you can delete all of the folders except of armeabi (from the library jar). It will then work.

 

[danijel]

Thank you Erel, after deleting it works on all tested phones.
BTW i saved 2MB
So, no phone will be impacted with deleting this folders?

 

[Erel]

No. However starting from August 2019 all native libraries must also include 64 bit libraries: https://android-developers.googleblog.com/2017/12/improving-app-security-and-performance.html