Question

In my “OnClickListener” the “ProgressDialog” doesn’t appear (code below):

    Button suchenbutton = (Button) findViewById(R.id.suchen);
    suchenbutton.setOnClickListener(new View.OnClickListener() {
        //TODO
       public void onClick(View v) {

           ProgressDialog dialog= ProgressDialog.show(TankFinderActivity.this, "", 
                "Loading. Please wait...", true);
           InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
           imm.hideSoftInputFromWindow(filterTextSSD.getWindowToken(), 0);
           loadsuchen();

           dialog.dismiss();

       }

    });

What did I do wrong?

Answer 1

It seems that loadsuchen() is a heavy method that runs on the main thread. Use AsyncTask to run that method in a separate thread and call dialog.dismiss() at the end:

@Override
public void onClick(View arg0)
{
    final ProgressDialog dialog = ProgressDialog.show(TankFinderActivity.this, "", "Loading. Please wait...", true);
    InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(filterTextSSD.getWindowToken(), 0);

    new AsyncTask<Void, Void, Void>()
    {
        @Override
        protected Void doInBackground(Void... params)
        {
            loadsuchen();
            return null;
        }

        @Override
        protected void onPostExecute(Void result)
        {
            dialog.dismiss();
        }
    }.execute();
}