Home/ Questions/Q 8298713
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-08T15:53:08+00:00

When I start my CalendarPopUp Activity, I get a NullPointerException . Here’s my code.

  • 0

When I start my CalendarPopUp Activity, I get a NullPointerException.

Here’s my code.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setUpWindow();
    Intent intent = getIntent();
    Bundle extras = intent.getExtras(); // This is Line 37
    boolean isForResult = extras.containsKey("result");
            //...
}

Here’s the exception

07-30 09:33:47.269: E/AndroidRuntime(19979): FATAL EXCEPTION: main
07-30 09:33:47.269: E/AndroidRuntime(19979): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.moveinblue.planner/com.moveinblue.planner.utils.popup.CalendarPopup}: java.lang.NullPointerException
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2079)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2104)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.ActivityThread.access$600(ActivityThread.java:132)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1157)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.os.Handler.dispatchMessage(Handler.java:99)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.os.Looper.loop(Looper.java:137)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.ActivityThread.main(ActivityThread.java:4575)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at java.lang.reflect.Method.invokeNative(Native Method)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at java.lang.reflect.Method.invoke(Method.java:511)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at dalvik.system.NativeStart.main(Native Method)
07-30 09:33:47.269: E/AndroidRuntime(19979): Caused by: java.lang.NullPointerException
07-30 09:33:47.269: E/AndroidRuntime(19979):    at com.moveinblue.planner.utils.popup.CalendarPopup.onCreate(CalendarPopup.java:37)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.Activity.performCreate(Activity.java:4465)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
07-30 09:33:47.269: E/AndroidRuntime(19979):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2033)
07-30 09:33:47.269: E/AndroidRuntime(19979):    ... 11 more

Can anybody help me here?

After debugging I know intent’s mExtras object is null (intent is actually not null, but most of its inner objects are). Of course when calling getExtras() it returns null, and when calling containsKey() it will throw a NullPointerException.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The getExtras() method returns null, if no extra has been added to the intent (documentation). Try to add that extra to the intent first, then start the CalendarPopUpActivity, then extract this Bundle from the Intent.

    EDIT:

    If you don’t always need that extra, check it first like this

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setUpWindow();
    Intent intent = getIntent();
    Bundle extras = intent.getExtras(); // This is Line 37
    if (extras != null) {
        boolean isForResult = extras.containsKey("result");
        //...
    }
}

    this way you will be able to detect if there is an extra in the intent, and you are saved from the NullPointerException

    • 0