Android: why is my OnKeyListener() not called?

I defined an EditText-field and I want to be informed when the user edits that fields. So I thought: simple - I add an OnKeyListener and so I did. But even though the text field gets edited (and even displays the entered/modified text) I don't get any callback, i.e. the LOG-output doesn't show up.

    TextView text = new TextView(this);
    text.setText(...);
    ...
    text.setOnKeyListener(new OnKeyListener()
    {                           
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            TextView tv = (TextView)v;
            CharSequence val = tv.getText();
            Log.v(TAG, "value: " + val);
            // ... rest omitted for brevity
        }
    });

Any idea, why that callback is never called?

Michael

PS.: Sigh! Android is really full of oddities! It seems that almost nothing I touched so far worked immediatly as one would expect. And - believe it or not - I have LOTS of experience with GUIs, esp. in Java (AWT, Swing, SWT, you name it...) But Android is a really tough beast!