Android OnKeyListener and OnTouchListener ？

/**
 * Interface definition for a callback to be invoked when a hardware key event is
 * dispatched to this view. The callback will be invoked before the key event is
 * given to the view. This is only useful for hardware keyboards; a software input
 * method has no obligation to trigger this listener.
 */
public interface OnKeyListener {
    /**
     * Called when a hardware key is dispatched to a view. This allows listeners to
     * get a chance to respond before the target view.
     * <p>Key presses in software keyboards will generally NOT trigger this method,
     * although some may elect to do so in some situations. Do not assume a
     * software input method has to be key-based; even if it is, it may use key presses
     * in a different way than you expect, so there is no way to reliably catch soft
     * input key presses.
     *
     * @param v The view the key has been dispatched to.
     * @param keyCode The code for the physical key that was pressed
     * @param event The KeyEvent object containing full information about
     *        the event.
     * @return True if the listener has consumed the event, false otherwise.
     */
    boolean onKey(View v, int keyCode, KeyEvent event);
}

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/**
     * Interface definition for a callback to be invoked when a touch event is
     * dispatched to this view. The callback will be invoked before the touch
     * event is given to the view.
     */
    public interface OnTouchListener {
        /**
         * Called when a touch event is dispatched to a view. This allows listeners to
         * get a chance to respond before the target view.
         *
         * @param v The view the touch event has been dispatched to.
         * @param event The MotionEvent object containing full information about
         *        the event.
         * @return True if the listener has consumed the event, false otherwise.
         */
        boolean onTouch(View v, MotionEvent event);
    }