Android Touch Events Pointer Down

Question

Hi I am trying to detect when 2 fingers are touching the screen:

   case MotionEvent.ACTION_POINTER_2_DOWN: {

    twoFing=true;
    return true;
}

the problem is that:

public static final int ACTION_POINTER_2_DOWN

is depreceted, the doc says:

*Constant for getActionMasked(): A non-primary pointer has gone down. Use getActionIndex() to retrieve the index of the pointer that changed. The index is encoded in the ACTION_POINTER_INDEX_MASK bits of the unmasked action returned by getAction().*

but I don't understand how to use it... How could I detect that there are 2 pointers? ActionUP and DOwn always say there is only one pointer if I try getPointerIndex()

thanks a lot

EDIT: I post here the full code to be more clear about the problem. My code is working BUT as the ACTION_POINTER_2_DOWN is a deprecated value I want to replace it by something else but I don't know how.

@SuppressWarnings("deprecation")
public boolean onTouch(View v, MotionEvent event) {

switch(event.getAction()){

case MotionEvent.ACTION_DOWN : {
     Log.i(TAG, "Action Down");
    downX = event.getX(0);
    downY = event.getY(0);
    return true;
}

case MotionEvent.ACTION_UP: {


    upX = event.getX(0);
    upY = event.getY(0);

    float deltaX = downX - upX;
    float deltaY = downY - upY;
    Log.i(TAG, "Action UP deltaX="+deltaX+", deltaY="+deltaY);



    // swipe vertical?
    if(Math.abs(deltaY) > MIN_DISTANCE && twoFing){
        twoFing=false;

        // top or down
        if(deltaY < 0 ) 
        { 
            if(slide.zoom==1) 
            slide.zoom=0; 
        Log.i(TAG, "Going Down zooming in");
            //return true; 
        }
        if((deltaY > 0) )
        { 

            if(slide.zoom==0) 
                slide.zoom=1;  
            Log.i(TAG, "Going up zoomig out");
            //return true;
        }

        return true;
    }
    // swipe horizontal?
  if(Math.abs(deltaX) > MIN_DISTANCE && !twoFing){

        // left or right
        if(deltaX < 0) { this.slideToTheLeft(); return true; }
        if(deltaX > 0) { this.slideToTheRight(); return true; }
        return true;
    }

  return false;
}

case MotionEvent.ACTION_POINTER_2_DOWN: {

    twoFing=true; //inform that the touch was made with 2 fingers
    Log.i(TAG, "Action Second pointer down");

    return true;
}
}
return false;

}

Answer 1

I'm working on pointer stuff myself right now. You want to switch as follows

 switch(event.getAction() & MotionEvent.ACTION_MASK);
     case MotionEvent.ACTION_POINTER_DOWN:

ACTION_DOWN is about the first finger down. ACTION_POINTER_DOWN is about the second finger.

See http://www.vogella.com/articles/AndroidTouch/article.html for a fairly clear description.