java.lang.NoClassDefFoundError: com.loopj.android.airbrake.AirbrakeNotifier

[souissihaythem]

When i tired to integrate AirbrakeNotifier, i got an exception in this line:
AirbrakeNotifier.register(this, api_key);

Here are my logcat:
10-17 01:23:18.136: E/AndroidRuntime(482): FATAL EXCEPTION: main
10-17 01:23:18.136: E/AndroidRuntime(482): java.lang.NoClassDefFoundError: com.loopj.android.airbrake.AirbrakeNotifier
10-17 01:23:18.136: E/AndroidRuntime(482): at com.appoxy.timedroid.free.TimeDroid.initAirbrakeNotifier(TimeDroid.java:139)
10-17 01:23:18.136: E/AndroidRuntime(482): at com.appoxy.timedroid.free.TimeDroid.onCreate(TimeDroid.java:124)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.os.Handler.dispatchMessage(Handler.java:99)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.os.Looper.loop(Looper.java:123)
10-17 01:23:18.136: E/AndroidRuntime(482): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-17 01:23:18.136: E/AndroidRuntime(482): at java.lang.reflect.Method.invokeNative(Native Method)
10-17 01:23:18.136: E/AndroidRuntime(482): at java.lang.reflect.Method.invoke(Method.java:507)
10-17 01:23:18.136: E/AndroidRuntime(482): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-17 01:23:18.136: E/AndroidRuntime(482): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-17 01:23:18.136: E/AndroidRuntime(482): at dalvik.system.NativeStart.main(Native Method)

I don't understand why i get AirbrakeNotifier null, i integrated the jar in libs!!!