NullPointerException when starting activity

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E/AndroidRuntime( 7216): FATAL EXCEPTION: main E/AndroidRuntime( 7216): Process: org.openbmap, PID: 7216 E/AndroidRuntime( 7216): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.openbmap/org.openbmap.activities.WifiDetailsActivity}: java.lang.NullPointerException E/AndroidRuntime( 7216): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184) E/AndroidRuntime( 7216): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) E/AndroidRuntime( 7216): at android.app.ActivityThread.access$800(ActivityThread.java:135) E/AndroidRuntime( 7216): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) E/AndroidRuntime( 7216): at android.os.Handler.dispatchMessage(Handler.java:102) E/AndroidRuntime( 7216): at android.os.Looper.loop(Looper.java:136) E/AndroidRuntime( 7216): at android.app.ActivityThread.main(ActivityThread.java:5001) E/AndroidRuntime( 7216): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 7216): at java.lang.reflect.Method.invoke(Method.java:515) E/AndroidRuntime( 7216): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) E/AndroidRuntime( 7216): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) E/AndroidRuntime( 7216): at dalvik.system.NativeStart.main(Native Method) E/AndroidRuntime( 7216): Caused by: java.lang.NullPointerException E/AndroidRuntime( 7216): at org.openbmap.activities.WifiDetailsActivity.onCreate(WifiDetailsActivity.java:74) E/AndroidRuntime( 7216): at android.app.Activity.performCreate(Activity.java:5231) E/AndroidRuntime( 7216): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) E/AndroidRuntime( 7216): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) E/AndroidRuntime( 7216): ... 11 more