Hai ragione, provvedo subito
codice:
E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: loredana.bdefinitiva, PID: 11892
                   java.lang.RuntimeException: Unable to start activity  ComponentInfo{loredana.bdefinitiva/loredana.bdefinitiva.ControlPanel}:  java.lang.NullPointerException: Attempt to invoke virtual method  'java.lang.String android.os.Bundle.getString(java.lang.String)' on a  null object reference
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2702)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2767)
                      at android.app.ActivityThread.access$900(ActivityThread.java:177)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1449)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:145)
                      at android.app.ActivityThread.main(ActivityThread.java:5951)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at java.lang.reflect.Method.invoke(Method.java:372)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
                    Caused by: java.lang.NullPointerException: Attempt to invoke virtual  method 'java.lang.String android.os.Bundle.getString(java.lang.String)'  on a null object reference
                      at loredana.bdefinitiva.ControlPanel.onCreate(ControlPanel.java:24)
                      at android.app.Activity.performCreate(Activity.java:6289)
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2655)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2767) 
                      at android.app.ActivityThread.access$900(ActivityThread.java:177) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1449) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:145) 
                      at android.app.ActivityThread.main(ActivityThread.java:5951) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at java.lang.reflect.Method.invoke(Method.java:372) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
]