CODEWITHSUNDEEP
androiduser-interfaceandroid-asynctaskspinner
Prizoff
Prizoff

Reputation: 4575

Android: Spinner displaying contents from web service

I want to make such thing:

The main goal is to display spinner contents loaded from some web service.

User clicks on spinner - adapter should show some text, like "loading...". And when it finally be loaded - it should replace existing adapter in spinner with loaded contents.

What did I do: I've made a spinner and onTouchListener for it. In Listener I am launching asyncTask, which downloads data from web service. In onPostExecute of asyncTask I am trying actually to replace spinners adapter and do spinner.performClick(). But in fact, user is seeing 2 adapters simultaneously - initial one ("Loading...") and the new one, which was shown by spinner.performClick().

Are there any better ideas how can be done initial task or how I can show only one adapter?

Here is some code I use:

private class CountryRegionCity extends AsyncTask<String, Void, JSONArray> {
    protected JSONArray doInBackground(String... params) {
        // Getting contents from web service            
        {...}
        return someJSONArray;
    }

        protected void onPostExecute (JSONArray jsonArray) {

        ArrayList<String> countryNames = new ArrayList<String>();
        //Filling here countryNames based on jsonArray
        {...}

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_item, countryNames);

        mCountrySpinner.setAdapter(adapter);
        mCountrySpinner.performClick();
    }
}

public View onCreateDialogView() {

    ArrayAdapter<String> countryArrayAdapter=new ArrayAdapter<String> (context(), android.R.layout.simple_spinner_item, new String[] {"Loading..."});
    mCountrySpinner.setAdapter(countryArrayAdapter);

    mCountrySpinner.setOnTouchListener(new OnTouchListener() {      
            public boolean onTouch(View v, MotionEvent event) {
                CountryRegionCity getCountries = new CountryRegionCity();
                getCountries.execute("countries");
                return false;
            }
        });
}

Upvotes: 1

Views: 1047

Answers (1)

bGuruprasad.com
bGuruprasad.com

Reputation: 362

I guess you can user notifyDataSetChanged() method of Spinner control to show the change in adapter data.

Upvotes: 1

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