Android onTouch() makes sound like double tap

Question

I've implemented onTouch for my layout to function as buttons.
It all works great besides the fact that a 2 clicks sound is made sometimes as touching the button.
I've tried to debug it but I wasn't able to understand what is the problem.

Here is the onTouch code :

button.setOnTouchListener(new OnTouchListener() 
{
    @Override
    public boolean onTouch(View v, MotionEvent event)
    {
        Log.d(TAG, "onTouch "+event.getAction());
        switch (event.getAction())
        {
            case MotionEvent.ACTION_HOVER_ENTER:
                v.setBackgroundResource(R.color.main_menu_buttons_bg_pressed);
                break;
            case MotionEvent.ACTION_HOVER_EXIT:
                v.setBackgroundResource(R.color.background_color);
                break;
            case MotionEvent.ACTION_DOWN:
                v.setBackgroundResource(R.color.main_menu_buttons_bg_pressed);
                break;
            case MotionEvent.ACTION_UP:
                Log.d(TAG, "on click");
                v.performClick();
                v.setBackgroundResource(R.color.background_color);
                break;
            default:
                // empty    
        }
        return false;
    }
});

As you can see I've added log messages, which usually prints :

onTouch 0
onTouch 2
onTouch 2
onTouch 2
onTouch 2
onTouch 1
on click

so it should be ok but yet the clicks are heard twice (sometimes, can't determine exactly when it happens)

Answer 1

it's the expected behaviour du of v.performClick(); , when the view has also an OnClikListener: From GrepCode

2480    public boolean More ...performClick() {
2481        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
2482
2483        if (mOnClickListener != null) {
2484            playSoundEffect(SoundEffectConstants.CLICK);
2485            mOnClickListener.onClick(this);
2486            return true;
2487        }
2488
2489        return false;
2490    }