对于新的Runnable（）{}类型，未定义方法getActivity（）

Question

I am trying to populate a Spinner with a JSON object that I am pulling from a restful API.

But I cannot figure out how to get Adapter working for the spinner. I have tried getActivity() and I've tried the this keyword. Neither one has worked and I can't find anything on Google where people are trying to update the spinner in this context.

Here is the code I am using. http://pastebin.com/bQWDHekB . When I just getActivity() it says, The method getActivity() is undefined for the type new Runnable(){}

but when I use this is says The constructor ArrayAdapter<String>(new Runnable(){}, int, String[]) is undefined

-- EDIT -- As per Maartens' answer, I found that using MainActivity.this worked better than getApplicationContext() . When you use getApplicationContext() it tends to use a different style and made my spinner have white text on a white background. Hopefully this helps someone else who had the same troubles as me.

Answer 1

Well, it's because Runnable doesn't have a getActivity() method.

You can get a reference to the wrapping activity by replacing

new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item, array_spinner);

by

new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, array_spinner);

or, because you just need any Context

new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_dropdown_item, array_spinner);

which is equivalent to

new ArrayAdapter<String>(MainActivity.this.getApplicationContext(), android.R.layout.simple_spinner_dropdown_item, array_spinner);