Callback while typing a character in editfield blackberry

Question

I need to get a callback with every character typed or deleted in EditField in BlackBerry. I need to get the text of EditField as soon as it is written, without losing focus.

Answer 1

There's multiple ways to do this. For example, if you have an EditField instance like this:

private EditField _editField;

then you can subclass EditField and override the keyChar() method:

_editField = new EditField() {
    protected boolean keyChar(char key, int status, int time) {
       super.keyChar(key, status, time);
       // 'key' is the most recent entered char
    }
});

or, you can implement a FieldChangeListener and listen for changes:

_editField.setChangeListener(new FieldChangeListener() {
    public void fieldChanged(Field field, int context) {
        String text = _editField.getText();
        // 'text' is the full text contents of the EditField
    }
});