My code goes like this:
- A button triggers one Activity on result, meaning that the activity should give back a result. 
- When the activity finishes and returns to the activity where the button was clicked, I would like to disable this button. 

I created the buttons dynamically, this is why I have to use them through View v on the onClick method. 

```
 public void onClick(View v) {
    b= (Button)v;

    Intent ir_a_emociones = new Intent(this,emociones_votar.class);
    ir_a_emociones.putExtra("alumno",alumno);
    ir_a_emociones.putExtra("asignatura",b.getText().toString());
    startActivityForResult(ir_a_emociones, 55);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 55) {
        if (resultCode == RESULT_OK) {
            Toast.makeText(this, "¡Gracias!", Toast.LENGTH_SHORT).show();
           ***--> here the button that triggered the intent should be disabled.***
        }
    }
}

```

There it is the onclick and the onActivityResult. I don't know how to referenciate back the button. B is a button, but as far as I know, it just let me get the references inside onClick.