Android keyboard next button issue on EditText

add this lines below your lines of code you provided:

txtUserid.setOnKeyListener(new OnKeyListener() {

    public boolean onKey(View v, int keyCode, KeyEvent event) {
          // If the event is a key-down event on the "enter" button
          if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
               (keyCode == KeyEvent.KEYCODE_ENTER))
          {
                // Perform action on Enter key press
                txtUserid.clearFocus();
                txtUserPasword.requestFocus();
                return true;
          }
          return false;
    }
});

txtUserPasword.setOnKeyListener(new OnKeyListener() {

    public boolean onKey(View v, int keyCode, KeyEvent event) {

          if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
                    (keyCode == KeyEvent.KEYCODE_ENTER))
          {
                 // Perform action on Enter key press
                 // check for username - password correctness here
                 return true;
          }
          return false;
    }
});

In your layout, just set the XML attributes android:imeOptions="actionNext" for your first three text boxes and android:imeOptions="actionDone" for the last one.

More Examples

Add android:singleLine="true" android:nextFocusDown="@+id/textView2" on your xml. Will show Next key and also focus to the next field.