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Zoé Bruwer
Courses Plus Student 195 PointsApp not running at all and no error code Adding the OnClick Method 2:57 with Ben Deitch
ok, so I am doing this section of the course and my app won't run. not on an emulator or on my Xperia x. and I see no errors. I've tried updating that didn't work. But what bothers me is the fact that it worked perfectly in the previous sections. What am I doing wrong? Should i post some code here? I'm very new to this. i hope you can help me .
7 Answers
Fernando Martinez
Android Development Techdegree Student 921 PointsWhat operating system are you using ??
Fernando Martinez
Android Development Techdegree Student 921 PointsIf you are using Linux is a big difference ?
Fernando Martinez
Android Development Techdegree Student 921 PointsTry this if won't help you let me know
Zoé Bruwer
Courses Plus Student 195 Pointsum but it is using android studio?
Fernando Martinez
Android Development Techdegree Student 921 PointsDid try to run other app ?
Zoé Bruwer
Courses Plus Student 195 Pointsum no. dont have any other app. and like is said the app worked perfectly before this section. im still new to this
Fernando Martinez
Android Development Techdegree Student 921 PointsSorry I did a search on eclipse.
Zoé Bruwer
Courses Plus Student 195 Pointslol, anyway you can look at my code?
Fernando Martinez
Android Development Techdegree Student 921 PointsNo. I don't see any code
Zoé Bruwer
Courses Plus Student 195 Pointsum i think you misunderstood my question. i meant can you please look at my code?
Zoé Bruwer
Courses Plus Student 195 Pointsid appreciate it if you could help me?
Zoé Bruwer
Courses Plus Student 195 PointsE/AndroidRuntime: FATAL EXCEPTION: main Process: za.co.nissiacademy.funfacts, PID: 12752 java.lang.RuntimeException: Unable to start activity ComponentInfo{za.co.nissiacademy.funfacts/za.co.nissiacademy.funfacts.FunFactActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2464) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2524) at android.app.ActivityThread.access$900(ActivityThread.java:154) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1391) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:234) at android.app.ActivityThread.main(ActivityThread.java:5526) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at za.co.nissiacademy.funfacts.FunFactActivity.onCreate(FunFactActivity.java:32) at android.app.Activity.performCreate(Activity.java:6285) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2524) at android.app.ActivityThread.access$900(ActivityThread.java:154) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1391) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:234) at android.app.ActivityThread.main(ActivityThread.java:5526) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Jason Anders
Treehouse Moderator 145,860 PointsHey Zoé,
I'm sorry, I don't use Windows at all, so I'm not sure I can be much help. You said that it worked in the previous sections, so it's very possible that you introduced a minor syntax issue in the current section that is preventing from running. You will have to have a look at all you code (especially the lines added since the last section). It could be as simple as a missing semi-colon or comma. Remember to also check you XML files.
If you can't figure it out and depending on which course you are referring to, you should be able to download the course files that would be complete up to the point where you are in the course. Not all courses provide this, however. But most courses to provide starter files for each section at least.
Hope you get this all sorted out soon. :)
Keep Coding!
Zoé Bruwer
Courses Plus Student 195 PointsZoé Bruwer
Courses Plus Student 195 PointsWindows 10
Zoé Bruwer
Courses Plus Student 195 PointsZoé Bruwer
Courses Plus Student 195 Pointsdoes that make a difference?