变焦跳跃!有谁知道这个问题?
boolean surfaceTouchEvent(MotionEvent event) {
pointNum=event.getPointerCount();
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_POINTER_DOWN:
// User is pressing down another finger.
float x11 = event.getX(0) - event.getX(1);
float y22 = event.getY(0) - event.getY(1);
z4 = sqrt(x11*x11+y22*y22);
break;
case MotionEvent.ACTION_POINTER_UP:
// User is released one of the fingers.
break;
case MotionEvent.ACTION_MOVE:
if (pointNum >= 2 ) {
x1=event.getX(0);
x2=event.getX(1);
y1=event.getY(0);
y2=event.getY(1);
float x = event.getX(0) - event.getX(1);
float y= event.getY(0) - event.getY(1);
float z3 = sqrt(x*x+y*y);
if (pointNum >= 2 ) {
if ( z3 < z4 ) {
zoom = z3/z4;
}
else {
zoom = z3/z4;
}
zoom = constrain(zoom, 0, 100);
}
press1=event.getSize(0);
press2=event.getSize(1);
}
break;
}
return super.surfaceTouchEvent(event);
}