运行2.2.1的demo出错，编码是UTF-8的

报的错是 E/AndroidRuntime(1958): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.easemob.chatuidemo/com.easemob.chatuidemo.activity.SplashActivity}: java.lang.ClassNotFoundException: Didn't find class "com.easemob.chatuidemo.activity.SplashActivity" on path: DexPathList[[zip file "/data/app/com.easemob.chatuidemo-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.easemob.chatuidemo-2, /system/lib]]。