How to open the VirtualKeyboard associated to a TextField when the field is edited? - java-me

Question

I initialized the VKBImplementationFactory in startApp() :
public void startApp() {
VKBImplementationFactory.init();
Display.init(this);
new MenuPrincipalForm(this).show();
}
I created also a VirtualKeyboard in a Form :
...
private VirtualKeyboard vkNombre = new VirtualKeyboard();
...
vkNombre.setInputModeOrder(new String[]{VirtualKeyboard.NUMBERS_SYMBOLS_MODE});
And I bound this VirtualKeyboard to a TextField :
cintxt=new TextField();
VirtualKeyboard.bindVirtualKeyboard(cintxt, vkNombre);
I registered dataChangeListener to this TextField :
public class ModifierFicheClient extends Form implements ActionListener, DataChangedListener
{
...
cintxt.addDataChangeListener(this);
...
}
In the dataChanged(int type, int index) method I want to open the vkNombre VirtualKeyBoard. I know that when clicking the TextField then the VirtualKeyboard is shown automatically. But there is a case when navigating to the TextField through the phone mobile scroll softbuttons then I can navigate to the TextField without clicking it and I can type any letters ! So how to call the VirtualKeyboard when typing a letter on the phone mobile ?
NB : I wrote System.out.println("zzzz"); in the dataChanged(int type, int index) method and the output writes two lines "zzzz" when I type one character ! So why the dataChanged method is called two times when I type only one letter ?

Answer 1

No need to use VKBImplementationFactory.init(); in startApp(). Because LWUIT automatically detect whether that mobile is touch screen or not. And numeric constraint not working on VKB when you use LWUIT 1.5 or before versions. It is bug on that versions. But it will be fixed on current repository version of LWUIT (Revision: 1605). So you can checkout from repository and use the latest LWUIT jar.
Update:
See the sample code for showing VKB while focusing on TextField,
TextField textField = new TextField();
final VirtualKeyboard keyboard = new VirtualKeyboard();
textField.addFocusListener(new FocusListener() {
public void focusGained(Component cmp)
keyboard.show();
}
public void focusLost(Component cmp) {
keyboard.dispose();
}
});
keyboard.setTextField(textField);