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Editorial Team
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Asked: 2026-05-27T10:25:14+00:00

I have an app with : an activity class that allows the user to

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I have an app with :

  • an activity class that allows the user to set multiple alarms.
  • a service class to manage those alarms in the background.
  • a receiver class to do certain work when the alarm is called.

Everything works fine.

Now I want to automatically start the service when the phone boots up. The onBootReceiver is received but the app crashes (NPE) when this line is reached in my service class:

Intent intent = new Intent (MainActivity.getContext(),AReceiver.class);

I can’t use this instead of MainActivity.getContext() either.

Any ideas of what may be causing this?

Thanks 🙂

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1 Answer

  1. Editorial Team

    From your code sample, it looks like the MainActivity class is not being initialized when being passed into the Intent. This means that the getContext() method will return a null value, and thats where your error is.

    You need to use getContext() or getApplicationContext() from a initialized object. If this proves impossible, you could do something like this.

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