Question

Hi Does anyone know how to create a refresh button that when pressed it shows a loading spinner and then when its stopped goes back to the button?

heres what ive got so far

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    //Check Preferences which sets UI

    checkPreferences();
   PostTask posttask;
   posttask = new PostTask();
   posttask.execute();

   Button backbtn = (Button) findViewById(R.id.backbtn);

    //Listening to button event
    backbtn.setOnClickListener(new View.OnClickListener() {

        public void onClick(View arg0) {
            //Starting a new Intent
            Intent previousScreen = new Intent(getApplicationContext(), ChooseTeamActivity.class);
            ChosenMethod = "null";
            SharedPreferences preferences = getSharedPreferences("prefs", Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = preferences.edit();
            editor.putString("ChosenMethod", ChosenMethod);            
            editor.commit();
            previousScreen.putExtra("FullData", fulldata);
            startActivity(previousScreen);

        }
    });

    Button refresh = (Button) findViewById(R.id.refresh);

    //Listening to button event
    refresh.setOnClickListener(new View.OnClickListener() {

        public void onClick(View arg0) {
            // TODO Auto-generated method stub

             PostTask posttask;
               posttask = new PostTask();
               posttask.execute();

        }


    });

heres the function i want it to load

public class PostTask extends AsyncTask<Void, String, Boolean> {


    @Override
    protected Boolean doInBackground(Void... params) {
        boolean result = false;


        loadFixtures();
        publishProgress("progress");
        loadResultsFeed();
        publishProgress("progress");
        loadNewsFeed();
        publishProgress("progress");
        return result;
    }

    protected void onProgressUpdate(String... progress) {
        StringBuilder str = new StringBuilder();
            for (int i = 1; i < progress.length; i++) {
                str.append(progress[i] + " ");

            }
    }

        @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        Log.v("BGThread", "begin fillin data");
         FillData();

      }
}

Answer 1

in your xml file make

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

    <Button
        android:id="@+id/refresh"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <ProgressBar
        android:id="@+id/progress"
        style="?android:attr/progressBarStyleSmall"
        android:layout_width="40dip"
        android:layout_height="40dip"
        android:layout_margin="10dip"
        android:visibility="gone" >
    </ProgressBar>
</RelativeLayout>

then in your PostTask onPreExecute method

findViewById(R.id.refresh).setVisibility(View.GONE);
findViewById(R.id.progress).setVisibility(View.VISIBLE);

and on your OnPostExecute

findViewById(R.id.refresh).setVisibility(View.VISIBLE);
findViewById(R.id.progress).setVisibility(View.GONE);