Android : Navigation Drawer with ListView (Unable to start activity ComponentInfo)

I'm trying to create a Navigation Drawer and it's default view is a listview

but when I set the listadapter it just have some bug like below...

07-07 10:22:34.318: E/AndroidRuntime(26075): FATAL EXCEPTION: main 07-07 10:22:34.318: E/AndroidRuntime(26075): Process: com.example.android.navigationdrawerexample, PID: 26075 07-07 10:22:34.318: E/AndroidRuntime(26075): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.navigationdrawerexample/com.example.android.navigationdrawerexample.MainActivity}: java.lang.NullPointerException

Is that something wrong with my code?

MainActivity.java : http://pastebin.com/pVXKLe7t