android - How to combine OnClickListener and OnTouchListener for an ImageButton

Question

I need to do something when the user clicks the ImageButton I've tried to create a static class that implements both OnClickListener and OnTouchListener

static class ClickListenerForScrolling implements OnClickListener, OnTouchListener 

that has the following methods:

@Override
public void onClick(View v)

and

@Override
public boolean onTouch(View arg0, MotionEvent arg1)

The whole idea behind this is to change the image source of the ImageButton when the user touches it, and perform a task when the user clicks this button. Can anybody give me a hint on how to do this?

Answer 1

Since both actions consist of the gestures "put finger on screen - lift finger from screen" you can't determine if it was touch action or a click action. So if you implement both listeners on this image button, a touch/click will change the picture AND press the button. Not sure if there is a determined order of these events...

However, if you want to separate these events, you will either need to define to a different gesture to one of the actions (like wiping to change picture), or create different areas who handle the events, for example the image doesn't fit the whole button and the free area serves as button click area.

HTH

Update:

I figured out, that a TouchEvent is more general than a ClickEvent thus it is called first.

public abstract boolean onTouch (View v, MotionEvent event)

This returns true, if the listener has consumed the event, false otherwise. So you can decide in your implementation if the Event should also be handled by OnClickListener, then just return false.