Show ProgressDialog Android

Question

I have an EditText which takes a String from the user and a searchButton. When the searchButton is clicked, it will search through the XML file and display it in the ListView.

I am able to take input from the user, search through the XML file and display the usersearched value in the ListView also.

What I want is to display a ProgressDialog after the searchButton is clicked like "PLEASE WAIT...RETRIEVING DATA..." or something like that and dismiss it when the data is shown.

public class Tab1Activity extends ListActivity { private Button okButton; private Button searchButton; Toast toast; String xml;  private TextView searchText; private String searchTextString; HashMap<String, String> o; ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();  @Override public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.tab1);      searchButton = (Button) findViewById(R.id.search_button);     searchButton.setOnClickListener(new View.OnClickListener() {          public void onClick(View v) {             // TODO Auto-generated method stub             System.out.print("hello");              searchText = (TextView) findViewById(R.id.search_text);             searchTextString = searchText.getText().toString();             readXml(searchTextString);          }     });  }  private void readXml(String searchTextString1) {     ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();      String xml = XMLfunctions.getXML();             //Here XMLfunctions is class name which parse xml     Document doc = XMLfunctions.XMLfromString(xml);      int numResults = XMLfunctions.numResults(doc);      if ((numResults <= 0)) {         Toast.makeText(Tab1Activity.this, "Testing xmlparser",                 Toast.LENGTH_LONG).show();         finish();     }      NodeList nodes = doc.getElementsByTagName("result");      for (int i = 0; i < nodes.getLength(); i++) {         HashMap<String, String> map = new HashMap<String, String>();          Element e = (Element) nodes.item(i);         String nameMapString = XMLfunctions.getValue(e, "name");             if ( nameMapString.toLowerCase().indexOf(searchTextString1.toLowerCase()) != -1 )   // != -1 means string is present in the search string             {                 map.put("id", XMLfunctions.getValue(e, "id"));                 map.put("name",  XMLfunctions.getValue(e, "name"));                 map.put("Score",  XMLfunctions.getValue(e, "score"));                 mylist.add(map);             }     }      ListAdapter adapter = new SimpleAdapter(this, mylist,             R.layout.parsexml, new String[] { "name", "Score" }, new int[] {                     R.id.item_title, R.id.item_subtitle });      setListAdapter(adapter);      final ListView lv = getListView();     lv.setTextFilterEnabled(true);     lv.setOnItemClickListener(new OnItemClickListener() {         public void onItemClick(AdapterView<?> parent, View view,                 int position, long id) {             @SuppressWarnings("unchecked")             HashMap<String, String> o = (HashMap<String, String>) lv                     .getItemAtPosition(position);                   Toast.makeText(Tab1Activity.this,                          "Name "+o.get("name")+"  Clicked", Toast.LENGTH_LONG)                         .show();                          }     }); } 

Answer 1

Declare your progress dialog:

ProgressDialog progress; 

When you're ready to start the progress dialog:

progress = ProgressDialog.show(this, "dialog title",     "dialog message", true); 

and to make it go away when you're done:

progress.dismiss(); 

---

Here's a little thread example for you:

// Note: declare ProgressDialog progress as a field in your class.  progress = ProgressDialog.show(this, "dialog title",   "dialog message", true);  new Thread(new Runnable() {   @Override   public void run()   {     // do the thing that takes a long time      runOnUiThread(new Runnable() {       @Override       public void run()       {         progress.dismiss();       }     });   } }).start();