i got a spinner with some options, and i want to change visibility of text box when the specific "other" option get selected , how should i do this ?

```
this.arraySpinner = new String[] {"Mobile", "Gaming", "Media Features", "Medical", "Sports And Nutrition","Security","Space","Other"};
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_item, arraySpinner);
    categories.setAdapter(adapter);

```