java.lang.NoClassDefFoundError: com.easemob.chat.EMChat

导入easemob-sdk-2.2.5中的uidemo（2个都试过），编译正常，启动的时候报错，真机模拟器都试过
环境：api23，adt23，buildtools24，eclipse
 
报错log：

 01-13 07:19:46.063: E/dalvikvm(30565): Could not find class 'com.easemob.chatuidemo.ui.MainActivity', referenced from method com.easemob.chatuidemo.DemoHelper.onConnectionConflict
01-13 07:19:46.064: E/dalvikvm(30565): Could not find class 'com.easemob.chatuidemo.ui.MainActivity', referenced from method com.easemob.chatuidemo.DemoHelper.onCurrentAccountRemoved
01-13 07:19:46.065: E/dalvikvm(30565): Could not find class 'com.easemob.chatuidemo.DemoHelper$6', referenced from method com.easemob.chatuidemo.DemoHelper.registerEventListener
01-13 07:19:46.069: E/dalvikvm(30565): Could not find class 'com.easemob.chatuidemo.DemoHelper$5', referenced from method com.easemob.chatuidemo.DemoHelper.setGlobalListeners
01-13 07:19:46.069: E/dalvikvm(30565): Could not find class 'com.easemob.easeui.domain.EaseUser', referenced from method com.easemob.chatuidemo.DemoHelper.updateContactList
01-13 07:19:46.086: E/AndroidRuntime(30565): FATAL EXCEPTION: main
01-13 07:19:46.086: E/AndroidRuntime(30565): Process: com.easemob.chatuidemo, PID: 30565
01-13 07:19:46.086: E/AndroidRuntime(30565): java.lang.NoClassDefFoundError: com.easemob.chat.EMChat
01-13 07:19:46.086: E/AndroidRuntime(30565):  at com.easemob.easeui.controller.EaseUI.init(EaseUI.java:118)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at com.easemob.chatuidemo.DemoHelper.init(DemoHelper.java:153)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at com.easemob.chatuidemo.DemoApplication.onCreate(DemoApplication.java:39)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1007)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4582)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.app.ActivityThread.access$1500(ActivityThread.java:151)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1402)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.os.Handler.dispatchMessage(Handler.java:110)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.os.Looper.loop(Looper.java:193)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at android.app.ActivityThread.main(ActivityThread.java:5333)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at java.lang.reflect.Method.invokeNative(Native Method)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at java.lang.reflect.Method.invoke(Method.java:515)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:828)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644)
01-13 07:19:46.086: E/AndroidRuntime(30565):  at dalvik.system.NativeStart.main(Native Method)