where & how to use onKey,onkeyDown,onKeyPressed event in android?

Question

hi where to use onKey and onKeyUp/Down event in android.

e.g. i have one textview . when user pressed any key i want to display that character in textview, In this case which event(above) is used.

PLEASE explain with EXAMPLE 

Or give some other example that get the key event and print in edittext or some other.

Thanks in advance...

Answer 1

If you are looking this in EditText, its better to use these

editText.addTextChangedListener(new TextWatcher() {
                public void afterTextChanged(Editable s) { 
                    Log.v("TAG", "afterTextChanged");
                }

                public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                    Log.v("TAG", "beforeTextChanged");
                }

                public void onTextChanged(CharSequence s, int start, int before, int count) {
                    Log.v("TAG", "onTextChanged");
                }
            });