Fail to retrieve bluetooth information on Android 2.3.7

[NGV1]

Hello,

I wouldt like to create a bluetooth application for an HTC Desire (Android 2.3.7) but I can not retrieve its bluetooth information. The error is happening during the deployment and doesn't occurred on a Samsung Galaxy Note 10.1" (with android 4.4.1)

Here is the error :

libApplication_Qt_Bluetooth_last.so 0x40642ba8
D/dalvikvm(31985): Added shared lib /data/data/org.qtproject.example.Application_Qt_Bluetooth_last/lib/libApplication_Qt_Bluetooth_last.so 0x40642ba8
D/dalvikvm(31985): No JNI_OnLoad found in /data/data/org.qtproject.example.Application_Qt_Bluetooth_last/lib/libApplication_Qt_Bluetooth_last.so 0x40642ba8, skipping init
W/dalvikvm(31985): Unable to resolve superclass of Lorg/qtproject/qt5/android/accessibility/QtAccessibilityDelegate; (99)
W/dalvikvm(31985): Link of class 'Lorg/qtproject/qt5/android/accessibility/QtAccessibilityDelegate;' failed
D/libEGL  (31985): loaded /system/lib/egl/libGLES_android.so
D/libEGL  (31985): loaded /system/lib/egl/libEGL_adreno200.so
D/libEGL  (31985): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
D/libEGL  (31985): loaded /system/lib/egl/libGLESv2_adreno200.so
W/dalvikvm(31985): JNI WARNING: DeleteLocalRef(0x406d1b28) failed to find entry (valid=1)
D/dalvikvm(31985): GetMethodID: method not found: Ljava/lang/RuntimeException;.getAddress:()Ljava/lang/String;
D/libApplication_Qt_Bluetooth_last.so(31985): (null):0 ((null)): local device
D/libApplication_Qt_Bluetooth_last.so(31985): (null):0 ((null)): 00:00:00:00:00:00

thanks for help.