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Can't create main activity, java.lang.String.split(java.lang.String)' on a null object reference

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  • L Offline
    L Offline
    lucaszanella
    wrote on 5 Aug 2020, 23:29 last edited by
    #1
    E Qt      : Can't create main activity
    E Qt      : java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] java.lang.String.split(java.lang.String)' on a null object reference
    E Qt      : 	at org.qtproject.qt5.android.bindings.QtLoader.startApp(QtLoader.java:613)
    E Qt      : 	at org.qtproject.qt5.android.bindings.QtActivityLoader.onCreate(QtActivityLoader.java:183)
    E Qt      : 	at org.qtproject.qt5.android.bindings.QtActivity.onCreateHook(QtActivity.java:266)
    E Qt      : 	at org.qtproject.qt5.android.bindings.QtActivity.onCreate(QtActivity.java:273)
    E Qt      : 	at android.app.Activity.performCreate(Activity.java:6984)
    E Qt      : 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1235)
    E Qt      : 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2797)
    E Qt      : 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2923)
    E Qt      : 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
    E Qt      : 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1616)
    E Qt      : 	at android.os.Handler.dispatchMessage(Handler.java:105)
    E Qt      : 	at android.os.Looper.loop(Looper.java:164)
    E Qt      : 	at android.app.ActivityThread.main(ActivityThread.java:6617)
    E Qt      : 	at java.lang.reflect.Method.invoke(Native Method)
    E Qt      : 	at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
    E Qt      : 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:769)
    

    Here's the main:

    int main(int argc, char *argv[])
    {
        qDebug() << "gonna create application";
        QApplication a(argc, argv);
        qDebug() << "gonna create main window";
        MainWindow w;
        w.show();
        return a.exec();
    }
    

    I dont even see those qDebug messages, which means the problem is probably before this.

    Looks like some bug in the Qt itself

    P 1 Reply Last reply 6 Aug 2020, 13:49
    0
    • L lucaszanella
      5 Aug 2020, 23:29
      E Qt      : Can't create main activity
      E Qt      : java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] java.lang.String.split(java.lang.String)' on a null object reference
      E Qt      : 	at org.qtproject.qt5.android.bindings.QtLoader.startApp(QtLoader.java:613)
      E Qt      : 	at org.qtproject.qt5.android.bindings.QtActivityLoader.onCreate(QtActivityLoader.java:183)
      E Qt      : 	at org.qtproject.qt5.android.bindings.QtActivity.onCreateHook(QtActivity.java:266)
      E Qt      : 	at org.qtproject.qt5.android.bindings.QtActivity.onCreate(QtActivity.java:273)
      E Qt      : 	at android.app.Activity.performCreate(Activity.java:6984)
      E Qt      : 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1235)
      E Qt      : 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2797)
      E Qt      : 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2923)
      E Qt      : 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
      E Qt      : 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1616)
      E Qt      : 	at android.os.Handler.dispatchMessage(Handler.java:105)
      E Qt      : 	at android.os.Looper.loop(Looper.java:164)
      E Qt      : 	at android.app.ActivityThread.main(ActivityThread.java:6617)
      E Qt      : 	at java.lang.reflect.Method.invoke(Native Method)
      E Qt      : 	at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
      E Qt      : 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:769)
      

      Here's the main:

      int main(int argc, char *argv[])
      {
          qDebug() << "gonna create application";
          QApplication a(argc, argv);
          qDebug() << "gonna create main window";
          MainWindow w;
          w.show();
          return a.exec();
      }
      

      I dont even see those qDebug messages, which means the problem is probably before this.

      Looks like some bug in the Qt itself

      P Offline
      P Offline
      Pablo J. Rogina
      wrote on 6 Aug 2020, 13:49 last edited by Pablo J. Rogina 8 Jun 2020, 13:52
      #2

      @lucaszanella could you show your project file (.pro)?

      In addition, do you have any Java code in your project? If so, could you also show that?`

      Just in case, and to check that your Qt Creator/Android environment is setup OK, are you able to run any Android example? like Qt Notifier or Qt JNI Messenger?

      Upvote the answer(s) that helped you solve the issue
      Use "Topic Tools" button to mark your post as Solved
      Add screenshots via postimage.org
      Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

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      5 Aug 2020, 23:29

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