Implement map search function on custom Application like in native google maps-Collection of common programming errors

By Name og Location

public void searchPlace()
{       

    AlertDialog.Builder alert = new AlertDialog.Builder(this);

    alert.setTitle("Search Location");
    alert.setMessage("Enter Location Name: ");

    // Set an EditText view to get user input 
    final EditText input = new EditText(this);
    alert.setView(input);

    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {
      String value = input.getText().toString();
      // Do something with value!
      Log.d("value", value);

      Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());    
        try {
            List addresses = geoCoder.getFromLocationName(
                value, 5);
            String add = "";
            if (addresses.size() > 0) {
                p = new GeoPoint(
                        (int) (addresses.get(0).getLatitude() * 1E6), 
                        (int) (addresses.get(0).getLongitude() * 1E6));
                mc.animateTo(p);    // create mapController object like `MapController mc = mapView.getController();`
                mapView.invalidate();
            }    
        } catch (IOException e) {
            e.printStackTrace();
        }


      }
    });

    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int whichButton) {
        // Canceled.
      }
    });

    alert.show();

}  

By LAtLang.

public void byLatLang()
{       

    LayoutInflater factory = LayoutInflater.from(this);            
    final View textEntryView = factory.inflate(R.layout.latlong, null);

    AlertDialog.Builder alert = new AlertDialog.Builder(this);

    alert.setTitle("Search Location");
    alert.setMessage("Enter Lattitude and Longitude: ");

    alert.setView(textEntryView); 
    // Set an EditText view to get user input
    AlertDialog latLongPrompt = alert.create();

    final EditText lat = (EditText) textEntryView.findViewById(R.id.lat);
    final EditText longi = (EditText) textEntryView.findViewById(R.id.longi);

    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener()   {
    public void onClick(DialogInterface dialog, int whichButton) {

        Toast.makeText(getBaseContext(), "clicked ok ", Toast.LENGTH_SHORT).show();
      Double value1 = Double.parseDouble(lat.getText().toString());
      Double value2 = Double.parseDouble(longi.getText().toString());
      // Do something with value!
                  //Log.d("value1", value1);
          //Log.d("value2", value2);

      p = new GeoPoint(
                (int) (value1 * 1E6), 
                (int) (value2 * 1E6));

            mc.animateTo(p);
            mc.setZoom(17); 
            mapView.invalidate();


      }
    });

    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int whichButton) {
        // Canceled.
      }
    });

    alert.show();

}