gc = new Geocoder(this); //create new geocoder instance

gc = new Geocoder(this); //create new geocoder instance
btnSearch.setOnClickListener(new OnClickListener() {
  public void onClick(View v) {
    String addressInput = adress.getText().toString(); //Get input text
  }
});

gc = new Geocoder(this); //create new geocoder instance
btnSearch.setOnClickListener(new OnClickListener() {
  public void onClick(View v) {
    String addressInput = adress.getText().toString(); //Get input text   
    try {
      List<Address> foundAdresses = gc.getFromLocationName(addressInput, 5); //Search addresses
    }
    catch (Exception e) {
      //@todo: Show error message
    }
  }
});

gc = new Geocoder(this); //create new geocoder instance
btnSearch.setOnClickListener(new OnClickListener() {
  public void onClick(View v) {
    String addressInput = adress.getText().toString(); //Get input text   
    try {
      List<Address> foundAdresses = gc.getFromLocationName(addressInput, 5); //Search addresses
      for (int i = 0; i < foundAdresses.size(); ++i) {
        //Save results as Longitude and Latitude
        //@todo: if more than one result, then show a select-list
        Address x = foundAdresses.get(i);
        lat = x.getLatitude();
        lon = x.getLongitude();
      }
      navigateToLocation((lat * 1000000), (lon * 1000000), myMap); //display the found address
    }
    catch (Exception e) {
      //@todo: Show error message
    }
  }
});

//Lot's of imports here... see full source

public class simpleGoogleMaps extends MapActivity {
  protected boolean isRouteDisplayed() { return false; }
  private MapView myMap;
  private Button btnSearch;
  private EditText adress;
  private Geocoder gc;
  private double lat;
  private double lon;
     
     
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
       
    myMap = (MapView) findViewById(R.id.simpleGM_map); //Get map from XML
    btnSearch = (Button) findViewById(R.id.simpleGM_btn_search); //Get button from XML
    adress = (EditText) findViewById(R.id.simpleGM_adress); //Get address from XML
       
    gc = new Geocoder(this); //create new geocoder instance
          
    btnSearch.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        String addressInput = adress.getText().toString(); //Get input text
                    
        try {
                         
          List<Address> foundAdresses = gc.getFromLocationName(addressInput, 5); //Search addresses
                         
          if (foundAdresses.size() == 0) { //if no address found, display an error
            Dialog locationError = new AlertDialog.Builder(simpleGoogleMaps.this)
              .setIcon(0)
              .setTitle("Error")
              .setPositiveButton(R.string.ok, null)
              .setMessage("Sorry, your address doesn't exist.")
              .create();
            locationError.show();
          }
          else { //else display address on map
            for (int i = 0; i < foundAdresses.size(); ++i) {
              //Save results as Longitude and Latitude
              //@todo: if more than one result, then show a select-list
              Address x = foundAdresses.get(i);
              lat = x.getLatitude();
              lon = x.getLongitude();
            }
          navigateToLocation((lat * 1000000), (lon * 1000000), myMap); //display the found address
          }
        }
        catch (Exception e) {
          //@todo: Show error message
        }
                    
      }
    });
    }
   
  /**
  * Navigates a given MapView to the specified Longitude and Latitude
  */
  public static void navigateToLocation (double latitude, double longitude, MapView mv) {
    GeoPoint p = new GeoPoint((int) latitude, (int) longitude); //new GeoPoint
    mv.displayZoomControls(true); //display Zoom (seems that it doesn't work yet)
    MapController mc = mv.getController();
    mc.animateTo(p); //move map to the given point
    int zoomlevel = mv.getMaxZoomLevel(); //detect maximum zoom level
    mc.setZoom(zoomlevel - 1); //zoom
    mv.setSatellite(false); //display only "normal" mapview 
  }
}

runOnUiThread(new Runnable(){
    public void run(){
        // ...
    }
}