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AEFA19
Asked: 2020-06-13 13:03:02 +0800 CST 2020-06-13 13:03:02 +0800 CST

Problem with the context of a Toast

  • 772

The program gives me an error in the context of the toast. I already tried with getApplicationContext(), with NombreActivity.thisand with only this.

I have a main activity called ReaderActivity, from it I command to call ServiceListener, which is a java class.

Inside the ServiceListener is the toast inside an OnClick. Here I leave the code. [Here I command to call the Service Listener class][1]

android

1 Answers

  1. Best Answer

    If your class extends from Activity, AppCompatActivityetc, you can use:

    getApplicationContext(), NombreActivity.thisorthis

    If your class extends from Serviceyou can use:

    this

    But in this case you have to send the context to the class. In this case you can modify your class ServiceListenerso that when you create it, you send the context from the Activity, example:

    ServiceListener servListener = new ServiceListener(getApplicationContext());

    this way you can get the context in the listener class.

    private Context context;

 //Puedes recibir en el constructor el contexto.
 public ServiceListener(Context ctx) {
        this.context = ctx;       
  }

    Now the variable context would be the one you would use as the context.

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