下面的代码是我一直尝试用于多点触控的代码。finger one设置正确,当我拖动手指时,它会四处移动。当我触摸和松开我的手指时,手指二会出现和消失,但它从来不会移动。知道出什么问题了吗?
我已经读过developers blog了,我仍然不明白问题是什么。
@Override
public boolean onTouchEvent(MotionEvent event) {
int action = event.getAction() & MotionEvent.ACTION_MASK;
int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
int pointerId = event.getPointerId(pointerIndex);
switch (action) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_POINTER_DOWN:
if (pointerId == 0)
{
fingerOneDown = 1;
fingerOneX = event.getX(pointerIndex);
fingerOneY = event.getY(pointerIndex);
}
if (pointerId == 1)
{
fingerTwoDown = 1;
fingerTwoX = event.getX(pointerIndex);
fingerTwoY = event.getY(pointerIndex);
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
case MotionEvent.ACTION_CANCEL:
if (pointerId == 0)
{
fingerOneDown = 0;
fingerOneX = event.getX(pointerIndex);
fingerOneY = event.getY(pointerIndex);
}
if (pointerId == 1)
{
fingerTwoDown = 0;
fingerTwoX = event.getX(pointerIndex);
fingerTwoY = event.getY(pointerIndex);
}
break;
case MotionEvent.ACTION_MOVE:
if (pointerId == 0)
{
fingerOneDown = 1;
fingerOneX = event.getX(pointerIndex);
fingerOneY = event.getY(pointerIndex);
}
if (pointerId == 1)
{
fingerTwoDown = 1;
fingerTwoX = event.getX(pointerIndex);
fingerTwoY = event.getY(pointerIndex);
}
break;
}
return true;
}
https://stackoverflow.com/questions/9028357
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