老师，这是闪退提示的信息，看不太懂

05-09 22:39:09.401 2891-2891/com.example.a25071.myapplication D/AndroidRuntime: Shutting down VM
                                                                                
                                                                                
                                                                                --------- beginning of crash
05-09 22:39:09.410 2891-2891/com.example.a25071.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                Process: com.example.a25071.myapplication, PID: 2891
                                                                                java.lang.ClassCastException: com.example.a25071.menudemo.MainActivity$3 cannot be cast to android.view.ActionMode$Callback
                                                                                    at com.example.a25071.menudemo.MainActivity$1.onLongClick(MainActivity.java:34)
                                                                                    at android.view.View.performLongClickInternal(View.java:6404)
                                                                                    at android.view.View.performLongClick(View.java:6362)
                                                                                    at android.widget.TextView.performLongClick(TextView.java:11004)
                                                                                    at android.view.View.performLongClick(View.java:6380)
                                                                                    at android.view.View$CheckForLongPress.run(View.java:24942)
                                                                                    at android.os.Handler.handleCallback(Handler.java:790)
                                                                                    at android.os.Handler.dispatchMessage(Handler.java:99)
                                                                                    at android.os.Looper.loop(Looper.java:192)
                                                                                    at android.app.ActivityThread.main(ActivityThread.java:6706)
                                                                                    at java.lang.reflect.Method.invoke(Native Method)
                                                                                    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
                                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:826)
05-09 22:39:09.493 2891-2891/com.example.a25071.myapplication I/Process: Sending signal. PID: 2891 SIG: 9